Au-ITO anode for efficient polymer light-emitting device operation

被引：19

作者：

Ke, L ^{[1
]}

Kumar, RS

Chen, P

Shen, L

Chua, SJ

Burden, AP

机构：

[1] Inst Mat Res & Engn, Singapore 117602, Singapore

[2] Natl Univ Singapore, Ctr Optoelect, Singapore 117567, Singapore

[3] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117567, Singapore

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2005年 / 17卷 / 03期

关键词：

anodes; cathodes; current density; indium compounds; light-emitting diode displays; polymers; voltage measurement; work function;

D O I：

10.1109/LPT.2004.841031

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A thick gold layer is deposited on indium tin oxide (ITO) to improve the interface quality between the ITO anode and the organic layer in organic light-emitting diodes. With this improvement, the device with structure ITO/Au/hole-transport-layer(HTL)/poly(p-phenylenevinylene)/Ca/Ag, achieved a lower turn-on voltage from 4 V to about 1.6 V and an increase in luminescence intensity by more than a factor of two at the same voltage. The work function of the An facilitates the formation of an ohmic contact and good mechanical adhesion to the HTL. The experimental results suggest that the ITO contact limits the supply of current for radiative recombination. The improvement of the device performance is due to the smoother An surface and the matching of the An work function with the highest occupied molecular orbital level of adjacent HTL layer.

引用

页码：543 / 545

页数：3

共 19 条

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[2]

2-1

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