| 摘要 |
An organic light emitting device which emits white light comprising: a reflective anode 3,5; a first light emitting layer 9 which emits red light located over said anode 3,5; a second light emitting layer 11 which emits blue and green light located over said first light emitting layer 9; and a cathode structure located over said second light emitting layer 11 comprising a first semi-reflecting layer 15 and a second semi-reflecting layer 21 with a layer of light transmissive material 17,19 between the first 15 and second 21 semi-reflecting semi-transparent layers, the distance between the reflective anode 3,5 and the first semi-reflecting semi-transparent layer 15 being selected to form a micro-cavity which enhances blue light emission and red light emission from the device, and the distance between the reflective anode 3,5 and the second semi-reflecting semi-transparent layer 21 being selected to enhance green light emission from the device. |
