Organic heterojunctions as a charge generation layer in tandem organic light-emitting diodes: the effect of interfacial energy level and charge carrier mobility

被引：34

作者：

Chen, Yonghua ^{[1
]}

Tian, Hongkun ^{[1
]}

Geng, Yanhou ^{[1
]}

Chen, Jiangshan ^{[1
]}

Ma, Dongge ^{[1
]}

Yan, Donghang ^{[1
]}

Wang, Lixiang ^{[1
]}

机构：

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

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2011年 / 21卷 / 39期

基金：

中国国家自然科学基金;

关键词：

HIGH-EFFICIENCY; THIENYL RINGS; CHAIN-LENGTH; DEVICES; CELL; SEMICONDUCTOR; ARCHITECTURE; TRANSISTORS; NAPHTHYL; NUMBER;

D O I：

10.1039/c1jm12499d

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A homologous series of p-type thiophene organic semiconductors NaTn (naphthyl end-capped oligothiophenes, n = 2-6 represents the number of thiophene units) were employed to form organic heterojunctions with n-type organic semiconductor C(60) (C(60)/NaTn), applied for high-performance tandem organic light-emitting diodes (OLEDs). The effect of organic heterojunctions as a charge generation layer on the performance of tandem OLEDs has been well demonstrated. We found that not only are the highest occupied molecular orbital levels of NaTn close to the lowest unoccupied molecular orbital of C(60), but also that a high charge carrier mobility is very important for constructing an effective charge generation layer to achieve high power efficiency in tandem OLEDs. Our results offer a design/selection rule for organic semiconductors used to construct effective organic heterojunction charge generation layers, which will be useful in future high-performance tandem OLEDs.

引用

页码：15332 / 15336

页数：5

共 25 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] Evolution of lowest singlet and triplet excited states with number of thienyl rings in platinum poly-ynes [J].

Chawdhury, N ;

Köhler, A ;

Friend, RH ;

Wong, WY ;

Lewis, J ;

Younus, M ;

Raithby, PR ;

Corcoran, TC ;

Al-Mandhary, MRA ;

Khan, MS .

JOURNAL OF CHEMICAL PHYSICS, 1999, 110 (10) :4963-4970

[3] Effective connecting architecture for tandem organic light-emitting devices [J].

Chen, CW ;

Lu, YJ ;

Wu, CC ;

Wu, EHE ;

Chu, CW ;

Yang, Y .

APPLIED PHYSICS LETTERS, 2005, 87 (24) :1-3

[4]

Chen Y, UNPUB

[5] 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)

[6] The Role of Transition Metal Oxides in Charge-Generation Layers for Stacked Organic Light-Emitting Diodes [J].

Hamwi, Sami ;

Meyer, Jens ;

Kroeger, Michael ;

Winkler, Thomas ;

Witte, Marco ;

Riedl, Thomas ;

Kahn, Antoine ;

Kowalsky, Wolfgang .

ADVANCED FUNCTIONAL MATERIALS, 2010, 20 (11) :1762-1766

[7] Electronic structures of interfacial states formed at polymeric semiconductor heterojunctions [J].

Huang, Ya-Shih ;

Westenhoff, Sebastian ;

Avilov, Igor ;

Sreearunothai, Paiboon ;

Hodgkiss, Justin M. ;

Deleener, Caroline ;

Friend, Richard H. ;

Beljonne, David .

NATURE MATERIALS, 2008, 7 (06) :483-489

[8] 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-+

[9] 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)

[10] Power efficiency improvement in a tandem organic light-emitting diode [J].

Liao, L. S. ;

Klubek, K. P. .

APPLIED PHYSICS LETTERS, 2008, 92 (22)

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