Patent ID: 7663304

Claim:
An organic electroluminescence element comprising: an anode; a first emitting layer comprising at least a first host material and a first dopant; a second emitting layer comprising at least a second host material and a second dopant; an electron injecting layer; and a cathode in the order mentioned, wherein the energy gap E gh 1 of the first host material, the energy gap E gd 1 of the first dopant, the energy gap E gh 2 of the second host material, and the energy gap E gd 2 of the second dopant satisfy the following formulas [i] to [iv]; the luminescent intensity I 1 at the maximum luminescent wavelength of an emission spectrum derived from the first emitting layer, and the luminescent intensity I 2 at the maximum luminescent wavelength of an emission spectrum derived from the second emitting layer satisfy the following formula [v]; and the electron mobility of the electron injecting layer is 10 −4 cm 2 /(V·sec) or more: E gh 1>E gd 1 [i] E gh 2>E gd 2 [ii] E gh 1>E gd 2 [iii] E gh 1>2.7eV [iv] I 1>3.5× I 2 [v].