论文部分内容阅读
采用蓝色、黄色磷光混色的发光方式实现白光有机电致发光器件(OLEDS),其中黄色发光层由红色和绿色磷光材料混合而成,器件的结构为ITO/MoO3(30nm)/NPB(40nm)/mCP:FIrpic(8%)(50nm)/CBP:R-4B(1%):GIrl(14%)(xnm)/BCP(10nm)/AlQ(40nm)/LiF(1nm)/Al(100nm)(x=2,3,4,5,6nm)。对器件的效率、亮度等对比发现,当x=5nm时,器件的性能最佳,最大亮度为9 471cd/cm2,效率为23.5cd/A,色坐标(0.32,0.35)。实验表明,影响器件色稳定性和效率低的原因是电子和空穴迁移随驱动电压变化响应不一致引发激子复合区域的移动。
A white light organic electroluminescent device (OLEDS) is realized by using blue and yellow phosphorescent mixed color light emitting devices. The yellow light emitting layer is made of a mixture of red and green phosphorescent materials. The structure of the device is ITO / MoO3 (30nm) / NPB (40nm) / mCP: FIrpic (8 nm) / CBP: R-4B (1%): GIr1 (14%) xnm / BCP 10 nm / AlQ 40 nm / LiF 1 nm / (x = 2, 3, 4, 5, 6 nm). Comparing the efficiency and brightness of the device, we found that the device has the best performance at 9nm, the maximum brightness is 9 471cd / cm2, the efficiency is 23.5cd / A and the color coordinates are 0.32,0.35. Experiments show that the reason of low color stability and low efficiency of the device is that the electron and hole migration lead to the exciton recombination area moving in response to the inconsistent response of driving voltage.