High efficiency and low roll-off blue phosphorescent organic light-emitting devices using mixed host architecture

被引：110

作者：

Chopra, Neetu ^{[1
,2
]}

Swensen, James S. ^{[1
]}

Polikarpov, Evgueni ^{[1
]}

Cosimbescu, Lelia ^{[1
]}

So, Franky ^{[2
]}

Padmaperuma, Asanga B. ^{[1
]}

机构：

[1] Pacific NW Natl Lab, Energy & Environm Directorate, Richland, WA 99352 USA

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

来源：

APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 03期

关键词：

organic compounds; organic light emitting diodes; phosphorescence; phosphors; ENERGY-TRANSFER; DIODES; ELECTROPHOSPHORESCENCE; BALANCE;

D O I：

10.1063/1.3464969

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report high efficiency and low roll-off for blue electrophosphorescent organic light emitting devices based on a mixed host layer architecture. The devices were fabricated using a mixed layer of di-[4-(N,N-ditolyl-amino)-phenyl]cyclohexane, a hole transport material, and 2,8-bis(diphenylphosphoryl)dibenzothiophene, an electron transport material, as the host layer doped with the blue phosphor iridium (III) bis[(4,6-difluorophenyl)-pyridinato-N,C-2']picolinate. Using a mixed layer as the host allowed us to achieve high power efficiency (59 lm/W at 100 cd/m(2)), low turn-on voltage (2.7 V for >10 cd/m(2)), and low roll-off in these devices. (C) 2010 American Institute of Physics. [doi:10.1063/1.3464969]

引用

页数：3

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