Ultra-high efficiency by multiple emission from stacked organic light-emitting devices

被引：144

作者：

Chiba, Takayuki ^{[1
]}

Pu, Yong-Jin ^{[1
]}

Miyazaki, Ryoichi ^{[1
]}

Nakayama, Ken-ichi ^{[1
]}

Sasabe, Hisahiro ^{[1
]}

Kido, Junji ^{[1
]}

机构：

[1] Yamagata Univ, Dept Organ Device Engn, Yamagata 9928510, Japan

来源：

ORGANIC ELECTRONICS | 2011年 / 12卷 / 04期

基金：

日本学术振兴会;

关键词：

Organic light-emitting devices; Charge generation layer; Stacked device; Multi-photon emission; ARCHITECTURE;

D O I：

10.1016/j.orgel.2011.01.022

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigated the charge generation characteristics of intermediate layer, consisting of an organic acceptor material 1,4,5,8,9,11-hexaazatriphenylene hexacarbonitrile (HAT-CN6) and an organic donor material N,N'-di(naphthalene-1-yl)-N,N'-diphenylbenzidine (NPD), for a stacked organic light-emitting device (OLED). A stack consisting of an ultrathin 1 nm of LiF and of Al was used as an electron-injection layer (EIL) from HAT-CN6 to an adjacent electron transporting layer (ETL). The orange-emitting fluorescent stacked OLED with the charge generation layer and the electron injection layer exhibited twice higher current efficiencies and a longer operational lifetime than those of the corresponding unstacked device under a high luminance. We also fabricated a green phosphorescent OLED showing an extremely high current efficiency of 256 cd/A. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：710 / 715

页数：6

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