文献类型：期刊文献

中文题名：异质结堆叠发光层红色磷光有机发光二极管

英文题名：Red phosphorescent organic light-emitting diodes based on heterojunction stacked light emitting layer

作者：郭方志[1];彭应全[1];朱化彪[1];丁荣正[1];刘辰[1];姚博[2]

机构：[1]中国计量大学光学与电子科技学院,浙江杭州310016;[2]绍兴文理学院数理信息学院,浙江绍兴312099

年份：2019

卷号：30

期号：6

起止页码：568

中文期刊名：光电子．激光

收录：北大核心2017、Scopus、CSCD2019_2020、北大核心、CSCD

基金：国家自然科学基金(61665010);国家自然科学基金(61504082);浙江省自然科学基金(LQ16F040001)资助项目

语种：中文

中文关键词：磷光;有机发光二极管;非掺杂;电流效率

外文关键词：phosphorescence;organic light-emitting diodes;non-doping;current efficiency

中文摘要：本文采用主客体交错结构的发光层,即发光层是由多组主体材料CBP和客体材料Ir(piq)2(acac)异质结堆叠构成的。为了改善器件的性能,分别优化了单主体层和单客体层的厚度。研究表明,单主体层厚度为3~4 nm,单客体层厚度为0.3 nm时,器件能够获得的最大电流效率为3.92 cd/A,色纯度和发光稳定性俱佳,1 mA工作电流下的CIE色坐标为(0.669 5,0.308 5),当工作电流从0.1 mA变化到1 mA,色度坐标的变化值(Δ(x,y))仅为(0.004 2,0.002 0)。所采用的主客体交错发光层的制备方法,工艺简单,且因为能分别调整主客体层的厚度而改善因客体分子聚集或因长程偶极子间相互作用对发光效率的影响,为非掺杂磷光有机发光二极管的制备提供了思路。

外文摘要：In this paper,the emitting layer was fabricated with host and guest interlaced,t hat is,the emitt ing layer consisted of a periodic thin layer of host material of CBP separated by guest material of Ir(piq)2(acac).In order to impr ove the performance of the device,the thicknesses of host layer and guest layer were optimized respectively.As a result,the optimal thickness of the single-host layer was 3~4nm,and the single-guest layer was 0.3nm,the maximum current efficiency of the device was 3.92cd/A.The colour purity and luminescence stability were both good,the OLEDs achieved stable red emission with a CIE coor dinate of (0.6695,0.3085) at an operation current of 1mA,and a small CIE variation value of (0.0042,0.0020) in the operation current range of 0.1mA to 1mA.This preparati on method with host and guest interlaced not only was simple in process,but also c ould adjust the thicknesses of host and guest layer separately,the influence of the aggregation of guest molecules or the long-ran ge dipole-dipole interaction on efficiency can be reduced.This method provides ideas for preparation of non-doped phosphorescent organic light-emitting diodes.