Efficient inverted top-emitting organic light-emitting diodes using ultrathin MoO3/C60 bilayer structure to enhance hole injection

被引：25

作者：

Hou, Jianhua ^{[1
]}

Wu, Jiang ^{[1
]}

Xie, Zhiyuan ^{[1
]}

Wang, Lixiang ^{[1
]}

机构：

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

来源：

APPLIED PHYSICS LETTERS | 2009年 / 95卷 / 20期

基金：

中国国家自然科学基金;

关键词：

aluminium; anodes; buffer layers; cathodes; charge injection; fullerenes; molybdenum compounds; organic light emitting diodes; semiconductor materials; semiconductor thin films; ultraviolet photoelectron spectra; X-ray photoelectron spectra; DEVICES; C-60;

D O I：

10.1063/1.3267084

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Efficient inverted top-emitting organic light-emitting diodes with aluminum (Al) as both the cathode and semitransparent anode are investigated. It is found that introduction of the ultrathin molybdenum trioxide (MoO3)/fullerene (C-60) bilayer structure between the low work function Al top anode and the hole-transporting layer dramatically enhances the device performance as compared to the devices with sole MoO3 or C-60 buffer layer. The ultraviolet photoemission spectroscopy and x-ray photoelectron spectroscopy indicate that the hole injection barrier between Al anode and hole-transporting layer is effectively reduced via strong dipole effect at Al/MoO3/C-60 interfaces with its direction pointing from Al to C-60.

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页数：3

相关论文

共 11 条

[1] Semitransparent cathodes for organic light emitting devices [J].

Burrows, PE ;

Gu, G ;

Forrest, SR ;

Vicenzi, EP ;

Zhou, TX .

JOURNAL OF APPLIED PHYSICS, 2000, 87 (06) :3080-3085

[2] 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

[3] Inverted top-emitting organic light-emitting diodes using sputter-deposited anodes [J].

Dobbertin, T ;

Kroeger, M ;

Heithecker, D ;

Schneider, D ;

Metzdorf, D ;

Neuner, H ;

Becker, E ;

Johannes, HH ;

Kowalsky, W .

APPLIED PHYSICS LETTERS, 2003, 82 (02) :284-286

[4] Effective hole injection of organic light-emitting diodes by introducing buckminsterfullerene on the indium tin oxide anode [J].

Hong, IH ;

Lee, MW ;

Koo, YM ;

Jeong, H ;

Kim, TS ;

Song, OK .

APPLIED PHYSICS LETTERS, 2005, 87 (06)

[5] Highly efficient top-emitting white organic electroluminescent devices [J].

Hsu, SF ;

Lee, CC ;

Hwang, SW ;

Chen, CH .

APPLIED PHYSICS LETTERS, 2005, 86 (25) :1-3

[6] Highly efficient top emitting organic light-emitting diodes with organic outcoupling enhancement layers [J].

Huang, Q ;

Walzer, K ;

Pfeiffer, M ;

Lyssenko, V ;

He, GF ;

Leo, K .

APPLIED PHYSICS LETTERS, 2006, 88 (11)

[7] Application of an ultrathin LiF/Al bilayer in organic surface-emitting diodes [J].

Hung, LS ;

Tang, CW ;

Mason, MG ;

Raychaudhuri, P ;

Madathil, J .

APPLIED PHYSICS LETTERS, 2001, 78 (04) :544-546

[8] Electronic and geometric structure of C60 on Al(111) and Al(110) [J].

Maxwell, AJ ;

Bruhwiler, PA ;

Arvanitis, D ;

Hasselstrom, J ;

Johansson, MKJ ;

Martensson, N .

PHYSICAL REVIEW B, 1998, 57 (12) :7312-7326

[9] A metal-free cathode for organic semiconductor devices [J].

Parthasarathy, G ;

Burrows, PE ;

Khalfin, V ;

Kozlov, VG ;

Forrest, SR .

APPLIED PHYSICS LETTERS, 1998, 72 (17) :2138-2140

[10] REACTION OF MOLECULAR-OXYGEN WITH C-60 - SPECTROSCOPIC STUDIES [J].

WERNER, H ;

SCHEDELNIEDRIG, T ;

WOHLERS, M ;

HEREIN, D ;

HERZOG, B ;

SCHLOGL, R ;

KEIL, M ;

BRADSHAW, AM ;

KIRSCHNER, J .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1994, 90 (03) :403-409