High power efficiency tandem organic light-emitting diodes based on bulk heterojunction organic bipolar charge generation layer

被引：85

作者：

Chen, Yonghua ^{[1
]}

Chen, Jiangshan ^{[1
]}

Ma, Dongge ^{[1
]}

Yan, Donghang ^{[1
]}

Wang, Lixiang ^{[1
]}

Zhu, Furong ^{[2
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Appl Chem, Grad Sch, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China

[2] Hong Kong Baptist Univ, Dept Phys, Ctr Adv Luminescence Mat, Kowloon Tong, Hong Kong, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2011年 / 98卷 / 24期

基金：

中国国家自然科学基金;

关键词：

DEVICES;

D O I：

10.1063/1.3599557

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The significant enhancement in power efficiency of tandem organic light-emitting diodes (OLEDs) was achieved using bulk heterojunction organic bipolar charge generation layer (CGL), consisted of zinc phthalocyanine (ZnPc): fullerene (C(60)) blend. In addition to a significant enhancement in luminance and current efficiency this work yielded a maximum power efficiency of 21 lm W(-1) for a tandem OLED, notably almost two times higher than that of a single-unit device, with a maximum power efficiency of 10.1 lm W(-1). The enhancement in power efficiency at higher luminance is also over 50%. The remarkable enhancement in power efficiency has been attributed to the effective charge generation, transport and extraction due to the presence of interface-modified ZnPc:C(60) CGL in tandem OLEDs. Our results demonstrate that the bulk heterojunction, consisting of two matched n- and p-type organic semiconductors, is a promising bipolar CGL for high power efficiency tandem OLEDs. (C) 2011 American Institute of Physics. [doi:10.1063/1.3599557]

引用

页数：3

共 19 条

[1] Highly efficient white organic electroluminescent devices based on tandem architecture [J].

Chang, CC ;

Chen, JF ;

Hwang, SW ;

Chen, CH .

APPLIED PHYSICS LETTERS, 2005, 87 (25) :1-3

[2]

Chen Y, UNPUB

[3] Microcavity two-unit tandem organic light-emitting devices having a high efficiency [J].

Cho, TY ;

Lin, CL ;

Wu, CC .

APPLIED PHYSICS LETTERS, 2006, 88 (11)

[4] Controlled p-doping of zinc phthalocyanine by coevaporation with tetrafluorotetracyanoquinodimethane:: A direct and inverse photoemission study [J].

Gao, WY ;

Kahn, A .

APPLIED PHYSICS LETTERS, 2001, 79 (24) :4040-4042

[5] Engineering the electronic structure of the ZnPc/C60 heterojunction by temperature treatment [J].

Hein, Corinna ;

Mankel, Eric ;

Mayer, Thomas ;

Jaegermann, Wolfram .

SOLAR ENERGY MATERIALS AND SOLAR CELLS, 2010, 94 (04) :662-667

[6] Low-voltage organic electroluminescent devices using pin structures [J].

Huang, JS ;

Pfeiffer, M ;

Werner, A ;

Blochwitz, J ;

Leo, K ;

Liu, SY .

APPLIED PHYSICS LETTERS, 2002, 80 (01) :139-141

[7] White stacked electrophosphorescent organic light-emitting devices employing MoO3 as a charge-generation layer [J].

Kanno, H ;

Holmes, RJ ;

Sun, Y ;

Kena-Cohen, S ;

Forrest, SR .

ADVANCED MATERIALS, 2006, 18 (03) :339-+

[8] Copper hexadecafluorophthalocyanine and copper phthalocyanine as a pure organic connecting unit in blue tandem organic light-emitting devices [J].

Lai, S. L. ;

Chan, M. Y. ;

Fung, M. K. ;

Lee, C. S. ;

Lee, S. T. .

JOURNAL OF APPLIED PHYSICS, 2007, 101 (01)

[9] Effective organic-based connection unit for stacked organic light-emitting devices [J].

Law, C. W. ;

Lau, K. M. ;

Fung, M. K. ;

Chan, M. Y. ;

Wong, F. L. ;

Lee, C. S. ;

Lee, S. T. .

APPLIED PHYSICS LETTERS, 2006, 89 (13)

[10] Highly efficient tandem p-i-n organic light-emitting diodes adopting a low temperature evaporated rhenium oxide interconnecting layer [J].

Leem, Dong-Seok ;

Lee, Jae-Hyun ;

Kim, Jang-Joo ;

Kang, Jae-Wook .

APPLIED PHYSICS LETTERS, 2008, 93 (10)

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