Patent ID: 8921834

Claim:
An organic light-emitting device comprising: an anode; a cathode; and an organic compound layer including at least a light emitting sublayer and being arranged between the anode and the cathode, the light emitting sublayer containing a host serving as a main component, a first dopant, and a second dopant, the organic light-emitting device satisfying the following relationships (1) and (2): (1) LUMO (H) >LUMO (D2), and (2) HOMO (H) is equal to or higher than HOMO (D2), (where LUMO (H) represents the LUMO of the host, LUMO (D2) represents the LUMO of the second dopant, HOMO (H) represents the HOMO of the host, and HOMO (D2) represents the HOMO of the second dopant), wherein for the host, the first dopant, and the second dopant, the following relationships (a) to (c) hold, whereby only the second dopant emits light: (a) first maximum emission wavelength (H) <first maximum emission wavelength (D 1 ) <first maximum emission wavelength (D 2 ), (b) LUMO (D2) <LUMO (D1) <LUMO (H), and (c) HOMO (D2) is equal to or lower than HOMO (H) <HOMO (D1) (where in the relationship (a), the first maximum emission wavelength (H) indicates the first maximum emission wavelength of the host, the first maximum emission wavelength (D1) indicates the first maximum emission wavelength of the first dopant, and the first maximum emission wavelength (D2) indicates the first maximum emission wavelength of the second dopant; in the relationship (b), LUMO (H) represents the LUMO of the host, LUMO (D1) represents the LUMO of the first dopant, and LUMO (D2) represents the LUMO of the second dopant; and in the relationship (c), HOMO (H) and HOMO(D2) are as defined above, and HOMO (D1) represents the HOMO of the first dopant).