Investigation of blue phosphorescent organic light-emitting diode host and dopant stability

被引：32
作者：
Klubek, Kevin P. [1 ]
Tang, Ching W. [1 ]
Rothberg, Lewis J. [1 ,2 ]
机构：
[1] Univ Rochester, Dept Chem Engn, Rochester, NY 14627 USA
[2] Univ Rochester, Dept Chem, Rochester, NY 14627 USA
来源：
ORGANIC ELECTRONICS | 2014年 / 15卷 / 07期
基金：
美国国家科学基金会;
关键词：
Organic light-emitting diodes; OLED; Hole transport; Degradation mechanism; Blue phosphorescent materials; Radical cation; WIDE-ENERGY-GAP; QUANTUM EFFICIENCY; ELECTROPHOSPHORESCENCE; DEVICES; DEGRADATION; OLEDS;
D O I：
10.1016/j.orgel.2014.03.020
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
By incorporating prospective materials for blue PHOLED emissive layers into model OLEDs, we have investigated how hole transport in a prototypical blue phosphorescent emitter, FIrpic (bis(4,6-difluorophenyl-pyridinato-N, C-2) picolinate Iridium) doped mCBP (4'-bis(3-methylcarbazol- 9-yl)-2,2'-biphenyl), can impact PHOLED device operational stability. We found the host mCBP to be stable in supporting hole transport, but unstable with respect to electron-hole recombination. As a dopant, FIrpic was found to be unstable with respect to both hole transport and charge recombination processes. Our results indicate that FIrpic doped mCBP is unsuitable for use as an emissive layer in OLED devices and we provide a general strategy to screen materials and better understand their stability. (C) 2014 Elsevier B. V. All rights reserved.
引用
收藏
页码：1312 / 1316
页数：5
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