一种双亚单层的有机白色发光器件

Study on White OLEDs with Dual Sub-monolayer

摘要:

制备了一种多层有机电致发光器件,其结构为ITO/m-MTDATA(45nm)/NPB(10nm)/DPVBi(15nm)/C545T(Xnm)/DCM2(Ynm)/Bhen(20nm)/Alq3(15nm)/LiF(1.0nm)/Al(200nm)。荧光材料C545T和DCM2以亚单层的方式插入蓝光发光层DPVBi后,通过改变双亚单层的厚度,观察器件性能的变化。当X/Y=0.05nm/0.05nm时,器件在8V的电压下最大发光效率是5.50cd/A,在13V的电压下最大的亮度是12 980cd/m²。研究了亚单层厚度的变化对器件的发光亮度、效率和光谱的影响。从实验结果中对比分析了三种器件的电流密度-电压曲线、亮度-电压曲线、电致发光光谱图和色坐标。从其中总结规律,对有机发光器件制作有一定的指导作用。 更多还原

Abstract:

One kind of organic light-emitting diodes (OLED) with the multilayer structure of ITO / m-MTDATA (45 nm) / NPB (10 nm) / DPVBi (15 nm) / C545T (X nm) / DCM2 (Y nm) / Bhen (20 nm) / Alq₃（15 nm）/LiF (1.0 nm)/Al (200 nm) was prepared. The fluorescent materials of C545T和DCM2 as dual sub-monolayers were inserted into the blue luminous layer of DPVBi. By changing the thickness ratio of X/Y, the performance of the devices was tested. It is shown that as X/Y is 0.05nm / 0.05nm, the maximum luminous efficiency is 5.50 cd/A at 8V and the highest brightness is 12980 cd/m² at 13V. The effects of different thickness of sub-monolayers on the luminous efficiency，brightness and spectrum are analyzed.