| 摘要 |
PROBLEM TO BE SOLVED: To provide an organic light-emitting device with high luminous efficiency and high power efficiency.SOLUTION: An organic light-emitting device comprises at least a hole-transport layer 20, two light-emitting layers 30 and 40, and an electron-transport layer 50, each having highest occupied molecular orbital (HOMO) energy level and lowest unoccupied molecular orbital (LUMO) energy level, where at least one of the HOMO energy level and/or the LUMO energy level of at least one of the light-emitting layers does not decrease in a stepwise fashion.SELECTED DRAWING: Figure 3 |
