Highly Efficient White Organic Light-Emitting Diodes with a p-i-n Tandem Structure

被引：9

作者：

Yokoyama, Meiso ^{[1
]}

Su, Shui-Hsiang ^{[1
]}

Hou, Cheng-Chieh ^{[1
]}

Wu, Chung-Ta ^{[1
]}

Kung, Chun-Hao ^{[1
]}

机构：

[1] I Shou Univ, Dept Elect Engn, Kaohsiung Cty 840, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2011年 / 50卷 / 04期

关键词：

DEVICES; LAYER; EMISSION; PERFORMANCE; BLUE;

D O I：

10.1143/JJAP.50.04DK06

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this study, we demonstrate the fabrication of highly efficient white organic light-emitting diodes (WOLEDs) with a p-i-n tandem structure using lithium (Li)-doped tris(8-hydroxyquinoline) aluminum (Alq(3))/molybdenum oxide (MoOx)-doped 4,4',4 ''-tris[2-naphthyl(phenyl)amino] triphenylamine (2-TNATA) as an effective interconnecting layer (ICL). The tandem device exhibited a luminance of 3800 cd/m(2), a luminous efficiency of 18.8 cd/A, a power efficiency of 5.48 lm/W, an external quantum efficiency of 6.5%, and the Commission Internationale d'Eclairage (CIE) coordinates of (x = 0.312; y = 0.396) at 20 mA/cm(2). The electroluminescence color of this p-i-n tandem device nearly did not change significantly with driving voltage variation and viewing angle. The various interfaces of ICL in such a tandem device were studied using a photovoltaic setup and were used to elucidate the mechanisms of the tandem devices. (C) 2011 The Japan Society of Applied Physics

引用

页数：4

共 30 条

[1]

BURROWS PE, 2001, Patent No. 6274980

[2] High-efficiency organic electroluminescent device with multiple emitting units [J].

Chang, CC ;

Hwang, SW ;

Chen, CH ;

Chen, JF .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, 2004, 43 (9A) :6418-6422

[3]

CHEN CW, 2005, P SOC PHOTO-OPT INS, V5937, P93727

[4] Effects of thermal annealing on performance of organic light-emitting diodes [J].

Chen, Guan-Ting ;

Su, Shui-Hsiang ;

Hou, Cheng-Chieh ;

Yokoyama, Meiso .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2007, 154 (05) :J159-J162

[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] White organic light-emitting devices for solid-state lighting [J].

D'Andrade, BW ;

Forrest, SR .

ADVANCED MATERIALS, 2004, 16 (18) :1585-1595

[7] Investigation of nanostructures in ordinary Portland cement through positron annihilation lifetime spectroscopy [J].

Consolati, G ;

Dotelli, G ;

Quasso, F .

JOURNAL OF APPLIED PHYSICS, 1999, 86 (08) :4225-4231

[8] White organic light-emitting diodes based on tandem structures [J].

Guo, FW ;

Ma, DG .

APPLIED PHYSICS LETTERS, 2005, 87 (17) :1-3

[9] Highly efficient p-i-n white organic light emitting devices with tandem structure [J].

Ho, Meng-Huan ;

Chen, Teng-Ming ;

Yeh, Pu-Cheng ;

Hwang, Shiao-Wen ;

Chen, Chin H. .

APPLIED PHYSICS LETTERS, 2007, 91 (23)

[10] Efficient pure-white organic light-emitting diodes with a solution-processed, binary-host employing single emission layer [J].

Jou, JH ;

Sun, MC ;

Chou, HH ;

Li, CH .

APPLIED PHYSICS LETTERS, 2006, 88 (14)

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