Organic light-emitting display panel and organic light-emitting display device having gradient doped electron transmission regions

Provided is an organic light-emitting display panel, including an array substrate and an organic light-emitting component. The array substrate includes a plurality of driving elements, and the organic light-emitting component is arranged to be associated with the driving element. The organic light-emitting component includes an anode and a cathode, and an organic functional layer therebetween. The organic functional layer includes an organic light-emitting layer, and an electron transmission region between the cathode and the organic light-emitting layer. The electron transmission region is doped with a first dopant comprising alkaline earth metal or rare earth metal elements. The electron transmission region includes first and second electron transmission layers. The doping concentrations C1, C2 of the first dopant in the first and second electron transmission layers satisfy: 0≤C2<C1. The electron transmission region can be at the same time matched with the cathode and the organic light-emitting layer.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application claims the benefit of priority to Chinese Patent Application No. 201810550601.8, filed on May 31, 2018, the content of which is incorporated herein by reference in its entirety.

TECHNICAL FIELD

The present disclosure relates to the field of display technologies and, in particular, to an organic light-emitting display panel and an organic light-emitting display device.

BACKGROUND

With the booming development of the planar display technologies, the organic light-emitting display device is becoming more widely used due to its excellent characteristics of self-luminous, high brightness, large angle of view, rapid response, etc.

The organic light-emitting device includes a plurality of organic light-emitting components. The organic light-emitting components include an anode, an organic light-emitting layer, an electron transmission layer and a cathode arranged to be stacked in sequence. During the working process of the organic light-emitting components, the cathode generates electrons, and the anode generates holes. Under the effect of an electrical field between the cathode and the anode, the holes move towards the organic light-emitting layer, and the electrons move towards the organic light-emitting layer through the electron transmission layer, when the holes and the electrons meet each other in the organic light-emitting layer, they are recombined to release energy to let the organic light-emitting component emit light.

Generally, in the related art, in order to improve the electron transmission capacity of the electron transmission layer, the electron transmission layer is doped to have a certain doping concentration. However, the inventor of the present disclosure has found that, the electron transmission layer in the related art cannot be at the same time matched with both the cathode and the organic light-emitting layer located at two sides thereof, resulting in that the luminescent effect of the organic light-emitting component is poor.

SUMMARY

Embodiments of the present disclosure provide an organic light-emitting display panel and an organic light-emitting display device, which can be at the same time matching with the cathode and the organic light-emitting layer located at two sides thereof, thereby improving luminescent effect of the organic light-emitting component.

In an aspect, embodiments of the present disclosure provide an organic light-emitting display panel, including: an array substrate comprising a plurality of driving elements; a plurality of organic light-emitting components arranged to be associated with the plurality of driving elements, wherein the organic light-emitting components each have an anode, a cathode and an organic functional layer between the anode and the cathode, wherein the organic functional layer comprises an organic light-emitting layer and an electron transmission region between the cathode and the organic light-emitting layer, wherein the electron transmission region is doped with a first dopant, and the first dopant comprises alkaline earth metal elements or rare earth metal elements; and wherein the electron transmission region comprises a first electron transmission layer and a second electron transmission layer, a doping concentration C1 of the first dopant in the first electron transmission layer and a doping concentration C2 of the first dopant in the second electron transmission layer satisfy following condition: 0≤C2<C1.

The first electron transmission layer is located between the second electron transmission layer and the cathode.

The second electron transmission layer is undoped with the first dopant.

C2 is variable so that a doping concentration of the first dopant at a side of the second electron transmission layer close to the first electron transmission layer is higher than a doping concentration of the first dopant at a side of the second electron transmission layer away from the first electron transmission layer.

C1 is variable so that a doping concentration of the first dopant at a side of the first electron transmission layer close to the cathode is higher than a doping concentration of the first dopant at a side of the first electron transmission layer away from the cathode.

A basis material of the second electron transmission layer is the same as a basis material of the first electron transmission layer.

The electron transmission region further comprises a third electron transmission layer adjacent to the organic light-emitting layer, and the third electron transmission layer is undoped with the first dopant.

A highest occupied molecular orbital HOMO1 of the third electron transmission layer and a highest occupied molecular orbital HOMO2 of a host material of the organic light-emitting layer satisfy: |HOMO1−HOMO2|<1 eV.

The basis material of the second electron transmission layer is the same as a material of the third electron transmission layer.

The organic light-emitting component further comprises an electron injection layer between the cathode and the electron transmission region, and the electron injection layer is made of at least one of an alkaline earth metal or a rare earth metal.

A thickness d of the electron transmission layer is d, wherein d≤5 nm.

The first dopant comprises at least one of Mg, Ga, Yb, Sm, Y, Tm, Gd and Lu.

The first dopant is an alkaline earth elementary metal or a rare earth elementary metal.

The first dopant is a metal oxide containing alkaline earth metal elements or rare earth metal elements, or the first dopant is a metal halide containing alkaline earth metal elements or rare earth metal elements, or the first dopant is metal complex containing alkaline earth metal elements or rare earth metal elements.

In another aspect, embodiments of the present disclosure provide an organic light-emitting display device, including any one of the above organic light-emitting display panels.

An embodiment of the present disclosure provides an organic light-emitting display panel and an organic light-emitting display device. The organic light-emitting display panel includes an electron transmission region between the cathode and the organic light-emitting layer. The electron transmission region is doped with a first dopant, and the first dopant contains alkaline earth metal elements or rare earth metal elements. The electron transmission region includes a first electron transmission layer and a second electron transmission layer. The doping concentration C1 of the first dopant in the first electron transmission layer and the doping concentration C2 of the first dopant in the second electron transmission layer satisfy: 0≤C2<C1, that is, the electron transmission region is gradient doped, so that the doping concentration at a side (one of the first electron transmission layer and the second electron transmission layer) of the electron transmission region close to the cathode is different from the doping concentration at a side (the other one of the first electron transmission layer and the second electron transmission layer) of the electron transmission region close to the organic light-emitting layer, thus the electron transmission region can be at the same time matched with the cathode and the organic light-emitting layer at two sides thereof, which is beneficial to improving the luminescent effect of the organic light-emitting component, and improving the display effect of the organic light-emitting display panel.

DESCRIPTION OF EMBODIMENTS

In order to make objects, technical solutions and advantages of the present disclosure more clearly, the technical solutions in the embodiments of the present disclosure will be described clearly and completely with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments, rather than all of them. Based on the embodiments of the present disclosure, any other embodiments obtained by those of ordinary skill in the art shall fall in the protection scope of the present disclosure.

It should be noted that, unless conflicts exist, the technical features in the embodiments of the present disclosure can be combined with each other.

An embodiment of the present disclosure provides an organic light-emitting display panel, as shown inFIGS. 1-3.FIG. 1illustrates a cross-sectional view of an organic light-emitting display panel according to an embodiment of the present disclosure,FIG. 2illustrates a first cross-sectional view of an organic light-emitting component according to an embodiment of the present disclosure, andFIG. 3illustrates a second cross-sectional view of an organic light-emitting component according to an embodiment of the present disclosure. The organic light-emitting display panel includes an array substrate1and an organic light-emitting component2. The array substrate1includes a plurality of driving elements11, and the organic light-emitting component2is arranged corresponding to the driving element11. The organic light-emitting component2includes an anode21and a cathode22, and an organic functional layer23between the anode21and the cathode22. The organic functional layer23includes an organic light-emitting layer231, and an electron transmission region232between the cathode22and the organic light-emitting layer231. The electron transmission region232is doped with a first dopant, and the first dopant contains alkaline earth metal elements or rare earth metal elements. The electron transmission region232includes a first electron transmission layer232aand a second electron transmission layer232b. The doping concentration C1 of the first dopant in the first electron transmission layer232aand the doping concentration C2 of the first dopant in the second electron transmission layer232bmeet the following requirement: 0≤C2<C1.

During the working process of the organic light-emitting component2, the cathode22generates electrons, and the anode21generates holes. Under the effect of an electrical field between the cathode22and the anode21, the holes move towards the organic light-emitting layer231, and the electrons move towards the organic light-emitting layer231through the electron transmission layer232. When the holes and the electrons meet each other in the organic light-emitting layer231, they are recombined to release energy to let the organic light-emitting component2emit light. The organic light-emitting component2can be an organic light-emitting diode (OLED).

The first dopant doped in the electron transmission region232can reduce the injection barrier of the electron, improve the electron transfer rate, and thus can effectively improve the electron transmission capacity of the electron transmission region232, which facilitates improving the luminescent effect of the organic light-emitting component and thus improving the display effect of the organic light-emitting display panel.

In the organic light-emitting display panel having the above described structure, the electron transmission region232is gradient-doped, so that the doping concentration at a side (one of the first electron transmission layer232aand the second electron transmission layer232b) of the electron transmission region232close to the cathode22is different from the doping concentration at a side (the other one of the first electron transmission layer232aand the second electron transmission layer232b) of the electron transmission region232close to the organic light-emitting layer231, thus the electron transmission region232can be at the same time matched with both the cathode22and the organic light-emitting layer231at two sides thereof, which is beneficial to improve the luminescent effect of the organic light-emitting component2, and thus improve the display effect of the organic light-emitting display panel.

In a direction towards the cathode22, the first electron transmission layer232aand the second electron transmission layer232bof the electron transmission region232can be stacked in many manners. For example, as shown inFIG. 2, the first electron transmission layer232ais located between the second electron transmission layer232band the cathode22. Alternatively, as shown inFIG. 3, the second electron transmission layer232bis located between the first electron transmission layer232aand the cathode22.

The situation that the doping concentration C1 of the first dopant in the first electron transmission layer232aand the doping concentration C2 of the first dopant in the second electron transmission layer232bmeet the following requirement: 0≤C2<C1 can also be achieved in many manners. For example, the doping concentration C1 of the first dopant in the first electron transmission layer232ais higher than the doping concentration C2 of the first dopant in the second electron transmission layer232b, and the doping concentration C2 of the first dopant in the second electron transmission layer232bis higher than zero. That is, the first electron transmission layer232aand the second electron transmission layer232bare both doped with the first dopant. Alternatively, the doping concentration C1 of the first dopant in the first electron transmission layer232ais higher than the doping concentration C2 of the first dopant in the second electron transmission layer232b, and the doping concentration C2 of the first dopant in the second electron transmission layer232bis zero. That is, the first electron transmission layer232ais doped with the first dopant, but the second electron transmission layer232bis not doped with the first dopant.

Optionally, as shown inFIG. 2, the first electron transmission layer232ais located between the second electron transmission layer232band the cathode22. Since the doping concentration C1 of the first dopant in the first electron transmission layer232ais higher than the doping concentration C2 of the first dopant in the second electron transmission layer232b, such arrangement can achieve that the doping concentration at the side (i.e., the first electron transmission layer232a) of the electron transmission region232close to the cathode22is relatively large, and the doping concentration at the side (i.e., the second electron transmission layer232b) of the electron transmission region232close to the organic light-emitting layer231is relatively small, thus the electrons can easily be injected into the electron transmission region232, and the electron transmission capacity of the electron transmission region232is better. Moreover, the contact between the first dopant and the organic light-emitting layer231can be avoided as far as possible, so as to prevent the adverse influence of the first dopant on the organic light-emitting layer231.

On this basis, the doping concentration of the first dopant in the first electron transmission layer232acan be set in several manners and, similarly, the doping concentration of the first dopant in the second electron transmission layer232bcan also be set in several manners. The first dopant in the first electron transmission layer232acan be gradient-doped or uniform-doped, and the first dopant in the second electron transmission layer232bcan be gradient-doped or uniform-doped or not doped.

For example, the second electron transmission layer232bis not doped with the first dopant, so as to avoid contact between the first dopant and the organic light-emitting layer231, thereby preventing adverse influence of the first dopant on the organic light-emitting layer231.

For another example, the doping concentration of the first dopant at a side of the second electron transmission layer232bclose to the first electron transmission layer232ais higher than the doping concentration of the first dopant at a side of the second electron transmission layer232baway from the first electron transmission layer232a, so that the second electron transmission layer232bis gradient doped, so as to better improve the electron transmission capacity of the electron transmission region232.

For still another example, the doping concentration of the first dopant at a side of the first electron transmission layer232aclose to the cathode22is higher than the doping concentration of the first dopant at a side of the first electron transmission layer232aaway from the cathode22, so that the second electron transmission layer232bis gradient-doped, so as to better improve the electron transmission capacity of the electron transmission region232, reduce the working voltage of the organic light-emitting display panel (compared to the situation of not being gradient doped, the working voltage can be reduced from 100% to 97%), increase the luminescent effect of the organic light-emitting component2(compared to the situation of not being gradient-doped, the luminescent effect can be increased from 100% to 105%), and improve the service life of the organic light-emitting component2(compared to the situation of not being gradient-doped, the service life can be improved from 100% to 104%).

For still another example, the doping concentration of the first dopant at each position of the first electron transmission layer232ais the same, that is, the first dopant is uniformly doped in the first electron transmission layer232a, and the doping concentration of the first dopant at each position of the second electron transmission layer232bis the same, that is, the first dopant is uniformly doped in the second electron transmission layer232b.

It should be noted that, if there is no conflict, the contents in the above examples can be combined with each other.

For example, as shown inFIG. 2, when the first electron transmission layer232ais located between the second electron transmission layer232band the cathode22, the doping concentration C1 of the first dopant in the first electron transmission layer232ais in a range of 10%-50%, the thickness of the first electron transmission layer232ais less than or equal to 10 Å, and the doping concentration C2 of the first dopant in the second electron transmission layer232bis in a range of 1%-5%, and the thickness of the second electron transmission layer232bis less than or equal to 350 Å. It should be noted that, no matter the first dopant in the first electron transmission layer232aor the second electron transmission layer232bis uniform-doped or gradient-doped, the doping concentration of the first dopant in each position of the first electron transmission layer232aor the second electron transmission layer232bsatisfies the above ranges.

Optionally, as shown inFIG. 3, the second electron transmission layer232bis located between the first electron transmission layer232aand the cathode22. In this case, those skilled in the art may refer to the setting manner of the doping concentration of the first dopant for the first and second electron transmission layers232a,232bin the situation that the first electron transmission layer232ais located between the second electron transmission layer232band the cathode22, which will not be repeated herein.

Optionally, in the present disclosure, the basis material of the second electron transmission layer232bis the same as the basis material of the first electron transmission layer232a, without the need of changing the target material of the basis material or the target material of the first dopant when forming the first electron transmission layer232aand the second electron transmission layer232bby vapor deposition, thus the vapor deposition process is simple. Moreover, the second electron transmission layer232band the first electron transmission layer232ahave good compatibility with same electron injection barrier, so that the electron transmission capacity of the electron transmission region232is good. For example, the basis material of the first electron transmission layer232aand the basis material of the second electron transmission layer232bcan both comprise one or more of the following functional groups: dipyridyl, triazine ring, lithium quinoline, carbazole, thiophene, or fluorene.

In addition, as shown inFIG. 4andFIG. 5,FIG. 4illustrates a third cross-sectional view of an organic light-emitting component according to an embodiment of the present disclosure, andFIG. 5illustrates a fourth cross-sectional view of an organic light-emitting component according to an embodiment of the present disclosure. In the present disclosure, the electron transmission region232further includes a third electron transmission layer232carranged adjacent to the organic light-emitting layer231, and the third electron transmission layer232cis not doped with the first dopant, so as to avoid the contact between the first dopant and the organic light-emitting layer231, thereby preventing adverse influence of the first dopant on the organic light-emitting layer231. In this case, the stacking manner of the electron transmission region232can be: as shown inFIG. 4, the third electron transmission layer232c, the second electron transmission layer232band the first electron transmission layer232aare arranged to be stacked in sequence in the direction close to the cathode22. Alternatively, as shown inFIG. 5, the third electron transmission layer232c, the first electron transmission layer232aand the second electron transmission layer232bare arranged to be stacked in sequence in the direction close to the cathode22.

Optionally, the highest occupied molecular orbital HOMO1 of the third electron transmission layer232cand the highest occupied molecular orbital HOMO2 of the basis material of the organic light-emitting layer231satisfy: |HOMO1−HOMO2|<1 eV, so that the third electron transmission layer232cnot only can transmit the electrons to the organic light-emitting layer231, but also can block the holes from entering the electron transmission region232from the organic light-emitting layer231, which is beneficial to control the recombination center of the electrons and the holes in the organic light-emitting layer231, improve the luminescent effect of the organic light-emitting component2, and improve the display effect of the organic light-emitting display panel.

Optionally, the lowest unoccupied molecular orbital LUMO1of the basis material of one of the first electron transmission layer232aand the second electron transmission layer232badjacent to the third electron transmission layer232cand the lowest unoccupied molecular orbital LUMO2of the third electron transmission layer232csatisfy: |LUMO1−LUMO2|≤0.2 eV, so that the electrons can be easily transmitted to the third electron transmission layer232c.

Optionally, the basis material of the second electron transmission layer232bis the same as the material of the third electron transmission layer232c, so that the vapor deposition process, when the second electron transmission layer232band the third electron transmission layer232care formed, is simple. When the third electron transmission layer232cis adjacent to the second electron transmission layer232b, it is better for improving the compatibility of the second electron transmission layer232band the third electron transmission layer232c, and the electron injection barrier is the same, so that the electron transmission capacity of the electron transmission region232is good.

The inventor has found that, during usage of the organic light-emitting component2, the holes are more easily to be injected and have larger transfer rate than the electrons, which may cause the recombination center of the holes and the electrons deviate from the organic light-emitting layer231. In order to solve this problem, in the present disclosure, as shown inFIG. 6andFIG. 7,FIG. 6illustrates a fifth cross-sectional view of an organic light-emitting component according to an embodiment of the present disclosure, andFIG. 7illustrates a sixth cross-sectional view of an organic light-emitting component according to an embodiment of the present disclosure. The organic light-emitting component2further includes an electron injection layer233. The electron injection layer233is located between the cathode22and the electron transmission region232, and the electron injection layer233is made of at least one of the alkaline earth metal or rare earth metal, so as to improve the electron injection capacity of the organic light-emitting component2. It is better to let the recombination center of the electrons and the holes in the organic light-emitting layer231, so as to improve the luminescent effect of the organic light-emitting component2, reduce the working voltage of the organic light-emitting display panel, and increase the service life of the organic light-emitting component2.

In the example shown inFIG. 6, the organic light-emitting component2includes an anode21, an organic light-emitting layer231, a third electron transmission layer232c, a second electron transmission layer232b, a first electron transmission layer232a, an electron injection layer233and a cathode22arranged to be stacked in sequence. In the example shown inFIG. 7, the organic light-emitting component2includes an anode21, an organic light-emitting layer231, a third electron transmission layer232c, a first electron transmission layer232a, a second electron transmission layer232b, an electron injection layer233and a cathode22arranged to be stacked in sequence.

Optionally, the thickness d of the electron injection layer233is d≤10 nm. Preferably, d≤5 nm, so that the arrangement of the electron injection layer233will not influence the recombination center of the holes and the electrons, thereby preventing the holes and the electrons from being recombined in positions out of the organic light-emitting layer231. For example, the thickness d of the electron injection layer233satisfies e.g., d is 1 nm, 2 nm, 3 nm, 4 nm or 5 nm.

Optionally, the material of the electron injection layer233is the same as the material of the first dopant, so as to simplify the manufacturing method of the organic light-emitting display panel.

Of course, the organic light-emitting component2may not include the electron injection layer233, in this situation, the cathode22is adjacent to the electron transmission region232, rather than the metal layer, so that when the cathode22is formed by vapor deposition, the cathode22has better molding characteristics, that is, black spots will not easily occur due to accumulation of the cathode22material, thus the display effect of the organic light-emitting display panel is better.

From the above description, the selection of the first dopant has a large influence on the electron transmission capacity of the electron transmission region232, in order for those skilled in the art to better understand and implement the technical solutions in the present disclosure, the possible materials of the first dopant will be illustrated by examples as below.

The inventor has found that, in order to better improve the electron transmission capacity of the electron transmission region232by the first dopant, the first dopant, the basis material of the first electron transmission layer232aand the basis material of the second electron transmission layer232bcan satisfy one or more of the following conditions: (1) the difference between the lowest unoccupied molecular orbital of the basis materials of the first electron transmission layer232aand the second electron transmission layer232band the work function of the first dopant is less than or equal to 0.3 eV; (2) the basis materials of the first electron transmission layer232aand the second electron transmission layer232bcontain a group coordinating with the first dopant, taking Yb used as the first dopant as an example, the basis materials of the first electron transmission layer232aand the second electron transmission layer232bcan include a compound containing N heterocyclic ring and its ramifications.

Optionally, the first dopant includes at least one of Mg, Ga, Yb, Sm, Y, Tm, Gd and Lu. In this case, the first dopant can be an elementary metal, or a compound (e.g., metal oxide or metal halide), or a complex, which will not be limited herein.

Optionally, the first dopant is an alkaline earth elementary metal, or a rare earth elementary metal. For example, the first dopant is elementary Mg, elementary Ga, elementary Yb, elementary Sm, elementary Y, elementary Tm, elementary Gd, or elementary Lu.

Optionally, the first dopant is a metal oxide containing alkaline earth metal elements or rare earth metal elements, or the first dopant is a metal halide containing alkaline earth metal elements or rare earth metal elements, or the first dopant is metal complex containing alkaline earth metal elements or rare earth metal elements. For example, the first dopant is magnesium oxide, calcium oxide, lithium fluoride or lithium quinoline.

In addition, the organic light-emitting component2can be a top emission organic light-emitting component (i.e., the light is emergent from the cathode), or a bottom emission organic light-emitting component (i.e., the light is emergent from the anode). For example, when the organic light-emitting component2is a top emission organic light-emitting component, the organic light-emitting component2includes a semi-transparent cathode22and a light-reflective anode21. For example, the material of the cathode22is Ag with a small thickness to achieve semi-transparent, and the material of the anode is ITO/Ag/ITO. When the organic light-emitting component2is a bottom emission organic light-emitting component, the organic light-emitting component2includes a light-reflective cathode22and a transparent anode21. For example, the material of the cathode22is Ag with a large thickness to achieve light reflection, and the material of the anode21is ITO. Optionally, the cathodes22of all the organic light-emitting components2are connected together to form an entire layer structure, so as to simplify the structure of the organic light-emitting display panel.

Of course, the organic light-emitting component2can further include one or more other structure. For example, a cap layer is provided at a side of the cathode22away from the anode21, a hole transmission layer is provided between the anode21and the organic light-emitting layer231, and a hole injection layer is provide between the anode21and the hole transmission layer, etc.

In addition, in the present disclosure, the organic light-emitting display panel includes a plurality of organic light-emitting components2having organic light-emitting components2emitting red light, organic light-emitting components2emitting green light and organic light-emitting components2emitting blue light, so that the light-emitting display panel can achieve full color display.

Since the wavelengths of the red light, green light and blue light are different, the requirements on at least one of the thickness of the electron transmission region232and the doping concentration of the first dopant in the electron transmission region232shall be different, therefore, the present disclosure provides three setting manners as follows:

Manner One: the first dopants in the electron transmission regions232of the organic light-emitting components2emitting red light, organic light-emitting components2emitting green light and organic light-emitting components2emitting blue light have doping concentrations different from one another, and the electron transmission regions232of the organic light-emitting components2emitting red light, organic light-emitting components2emitting green light and organic light-emitting components2emitting blue light have the same thickness.

Manner Two: the electron transmission regions232of the organic light-emitting components2emitting red light, organic light-emitting components2emitting green light and organic light-emitting components2emitting blue light have thicknesses different from one another, and the first dopant in the electron transmission regions232of the organic light-emitting components2emitting red light, organic light-emitting components2emitting green light and organic light-emitting components2emitting blue light have the same doping concentration.

Manner Three: the electron transmission regions232of the organic light-emitting components2emitting red light, organic light-emitting components2emitting green light and organic light-emitting components2emitting blue light have thicknesses different from one another, and the first dopants in the electron transmission regions232of the organic light-emitting components2emitting red light, organic light-emitting components2emitting green light and organic light-emitting components2emitting blue light have doping concentrations different from one another either.

Optionally, the thicknesses of the electron transmission regions232of the organic light-emitting components2emitting red light, organic light-emitting components2emitting green light and organic light-emitting components2emitting blue light can be reasonably selected in a range of 20 nm-50 nm, and the doping concentration of the first dopant in the electron transmission regions232of the organic light-emitting components2emitting red light, organic light-emitting components2emitting green light and organic light-emitting components2emitting blue light can be reasonably selected in a range of 1%-5%.

In addition, an embodiment of the present disclosure provides an organic light-emitting display device, as shown inFIG. 8.FIG. 8illustrates a top view of an organic light-emitting display device according to an embodiment of the present disclosure. The organic light-emitting display device includes any one of the above organic light-emitting display panels600.

The organic light-emitting display device can be products or components having display function such as smart phone, wearable smart watch, smart glasses, tablet PC, television, displayer, laptop, digital photo frame, navigator, on-board displayer, e-book and the like. The display panel and display device provided by the present disclosure can be flexible or non-flexible, which will not be limited herein.

An embodiment of the present disclosure provides an organic light-emitting display panel and an organic light-emitting display device. The organic light-emitting display panel includes an electron transmission region232between the cathode22and the organic light-emitting layer231. The electron transmission region232is doped with a first dopant, and the first dopant contains alkaline earth metal elements or rare earth metal elements. The electron transmission region232includes a first electron transmission layer232aand a second electron transmission layer232b. The doping concentration C1 of the first dopant in the first electron transmission layer232aand the doping concentration C2 of the first dopant in the second electron transmission layer232bsatisfy: 0≤C2<C1, that is, the electron transmission region232is gradient-doped, so that the doping concentration at a side (one of the first electron transmission layer232aand the second electron transmission layer232b) of the electron transmission region232close to the cathode22is different from the doping concentration at a side (the other one of the first electron transmission layer232aand the second electron transmission layer232b) of the electron transmission region232close to the organic light-emitting layer231, thus the electron transmission region232can be at the same time matched with the cathode22and the organic light-emitting layer231at two sides thereof, which is beneficial to improving the luminescent effect of the organic light-emitting component2, and thus improving the display effect of the organic light-emitting display panel.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than limiting; although the disclosure is illustrated in detail with reference to the above embodiments, person skilled in the art shall understand: they can still make modifications to the technical solutions recorded in the above embodiments, or make equivalent replacements to part or all of the technical features; however, these modifications or replacements will not let the essence of corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present disclosure.