文献类型：期刊文献

英文题名：Manipulation of recombination zone by utilizing the donor of electroplex as a spacer

作者：Lu, Zhaoyue[1];Yin, Yuehong[2];Xiao, Jing[3]

机构：[1]East China Univ Sci & Technol, Sch Sci, Dept Phys, Shanghai 200237, Peoples R China;[2]Henan Polytech Univ, Inst Phys Chem, Dept Appl Phys, Jiaozuo 454000, Henan Province, Peoples R China;[3]Taishan Univ, Phys & Elect Engn Coll, Tai An 271021, Shandong, Peoples R China

年份：2016

卷号：179

起止页码：469

外文期刊名：JOURNAL OF LUMINESCENCE

收录：;EI(收录号：20164102883398);WOS:【SCI-EXPANDED(收录号:WOS:000384384800067)】；

基金：We gratefully thank National Natural Science Foundation of China, China (11504109&61574098) for financially supporting this work.

语种：英文

外文关键词：Electroplex; Color stability; Spacer; CIE coordinate; Recombination region

摘要：The emission of electroplex is varied with applied voltages, leading to poor color stability of devices. In this work, the recombination region was investigated in organic light-emitting diodes (OLEDs) based on the electroplex between N,N'-diphenyl-N,N'-bis(1-naphthyl-phenyl)-1,1'-biphenyl-4,4'-diamine(NPB) and 2-(4-biphenylyl)-5-(4-tert-butylphenyl)-1,2,4-oxadiazole (PBD). Color stability was manipulated by introducing the donor of electroplex as a spacer, which plays an important role of recombination zone for electroplex-based OLEDs. The 5-nm-spacer-device brought out a tolerable chromaticity coordinate shift of less than 0.01 for both x- and y-value. White light emission with CIE coordinates of (0.37,0.28) and (033,0.26) at 12 V was achieved when the thickness of spacer was 7 and 10 nm, respectively. The 7-nm-spacer-device exhibited better color stability than the 10-nm-spacer-device. This proves that adjusting spacer thickness is a simple and efficient method to control recombination region and can be useful for fulfilling color-stable electroplex-based white emission. (C) 2016 Elsevier B.V. All rights reserved.