Effect of electron injection and transport materials on efficiency of deep-blue phosphorescent organic light-emitting devices

被引：59

作者：

Eom, Sang-Hyun ^{[1
]}

Zheng, Ying ^{[1
]}

Wrzesniewski, Edward ^{[1
]}

Lee, Jaewon ^{[1
]}

Chopra, Neetu ^{[1
]}

So, Franky ^{[1
]}

Xue, Jiangeng ^{[1
]}

机构：

[1] Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA

来源：

ORGANIC ELECTRONICS | 2009年 / 10卷 / 04期

关键词：

Deep-blue phosphorescent organic light-emitting devices (PHOLEDs); Electron transport materials; Alkaline doping; p-i-n; Dual-emissive-layer (D-EML); ENERGY-TRANSFER; TRIPLET ENERGY; EMISSION; ELECTROPHOSPHORESCENCE; DIODES; LAYERS;

D O I：

10.1016/j.orgel.2009.03.002

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate the performance of FIr6-based deep-blue phosphorescent organic light-emitting devices (PHOLEDs) with three different electron transport materials, bathocuproine (BCP), 4,7-diphenyl-1,10-phenanthroline (BPhen), and tris[3-(3-pyridyl)mesityl]borane (3TPYMB), and study the effect of doping alkaline metals (Li and Cs) into these charge transport materials. External quantum efficiency (eta(EQE)) of (20 +/- 1)% and peak power efficiency (eta(p)) of (36 +/- 2) Im/W were achieved maintaining Commission Internationale de L'Eclairage (CIE) coordinates of (x = 0.16, y = 0.28) in p-i-n dual-emissive-layer (D-EML) deep-blue PHOLEDs with 3TPYMB as the electron transport material and 3TPYMB:Cs as the electron injection layer. The high efficiencies are attributed to the high triplet energy of 3TPYMB as well as the increased conductivity of 3TPYMB:Cs. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：686 / 691

页数：6

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