Effect of cathodes on high efficiency inorganic-organic hybrid LEDs based on CdSe/ZnS quantum dots

被引：14

作者：

Nguyen Huu Tuan ^{[1
]}

Koh, Ken Ha ^{[1
]}

Pham Thu Nga ^{[2
]}

Lee, Soonil ^{[1
]}

机构：

[1] Ajou Univ, Div Energy Syst Res, Suwon 443749, South Korea

[2] VAST, Inst Mat Sci, Lab Mat & Engn Fiber Opt, Hanoi, Vietnam

来源：

JOURNAL OF CRYSTAL GROWTH | 2011年 / 326卷 / 01期

基金：

新加坡国家研究基金会;

关键词：

Energy barrier; CdSe/ZnS; Metal cathode; Quantum dot; Hybrid LED; LIGHT-EMITTING-DIODES; SEMICONDUCTING POLYMER; NANOCRYSTALS; DEVICES; ELECTROLUMINESCENCE; MONOLAYERS; BRIGHT; METAL;

D O I：

10.1016/j.jcrysgro.2011.01.063

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Inorganic-organic hybrid light emitting devices (HLEDs) with CdSe/ZnS quantum dot (QD) emitting layers are fabricated, and the variation of their operation characteristics with respect to a cathode material selection among Au, Al, and LiF/Al is investigated. All three types of QD-based HLEDs show orange-color emission, centered at 580 nm with a full-width at half-maximum of 50 nm, regardless of cathode material. However, quantitatively, the QD-HLED with a LiF/Al-cathode shows much larger current density and luminance compared to the other QD-HLEDs, owing to better electron injection. Moreover, the respective maximum values of power efficiency and luminous yield of the LiF/Al-cathode HLED are as large as 1.27 lm/W and 2.42 cd/A. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：109 / 112

页数：4

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