Applications of Ytterbium in organic light-emitting devices as high performance and transparent electrodes

被引：70

作者：

Lai, SL ^{[1
]}

Chan, MY ^{[1
]}

Fung, MK ^{[1
]}

Lee, CS ^{[1
]}

Hung, LS ^{[1
]}

Lee, ST ^{[1
]}

机构：

[1] City Univ Hong Kong, COSDAF, Dept Phys & Mat Sci, Kowloon, Hong Kong, Peoples R China

来源：

CHEMICAL PHYSICS LETTERS | 2002年 / 366卷 / 1-2期

关键词：

D O I：

10.1016/S0009-2614(02)01553-1

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：

Potential applications of Ytterbium (Yb) in cathode system for organic optoelectronic/electronic devices were explored in NPB/Alq(3) based bi-layer organic light-emitting devices (OLEDs). When a thin (14.5 nm) Yb layer capped with a thicker (200 nm) Ag layer was used as the cathode, the OLEDs show enhanced electron injection over those using the standard Mg:Ag cathode. Performance of the OLEDs with the Yb/Ag cathode is comparable to that using LiF/Al cathode. Interestingly, we also found that Yb can also be used to prepare a highly transparent cathode by coevaporating Yb and Ag to form a Yb:Ag alloy electrode. Surface-emitting (or top emission) and transparent (emission from both surfaces) OLEDs with low turn-on voltage (3.75 V) and high efficiency were prepared with the Yb:Ag electrode. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：128 / 133

页数：6

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