Fabrication of electroluminescent devices using Sr as an electron injection layer

被引：1

作者：

Tanaka, K ^{[1
]}

Miyagawa, E ^{[1
]}

Usui, H ^{[1
]}

机构：

[1] Tokyo Univ Agr & Technol, Dept Mat Syst Engn, Koganei, Tokyo 1848588, Japan

来源：

ELECTRONICS AND COMMUNICATIONS IN JAPAN PART II-ELECTRONICS | 2003年 / 86卷 / 04期

关键词：

organic EL device; Alq; strontium; electron injection layer; XPS measurements;

D O I：

10.1002/ecjb.1121

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：

Strontium (Sr) was evaporated on tris (8-quinolinolato) aluminum (Alq) to form an electron injection layer for organic electroluminescence (EL) device. Chemical status of Sr was examined by x-ray photoelectron spectroscopy (XPS). EL devices having the structure of ITO/PVCz:pTPD/Alq/Sr/Al were prepared and their luminance and lifetime were measured. It was found that EL characteristics could be improved by depositing metallic Sr layer at a deposition rate higher than 0.7 nm/s. XPS analysis showed that Sr interdiffuses into Alq when the Sr thickness exceeds 40 nm, which caused red shift of luminescence spectra by 10 nm. (C) 2003 Wiley Periodicals, Inc.

引用

页码：36 / 41

页数：6

共 10 条

[1] Investigation of the interface formation between calcium and tris-(8-hydroxy quinoline) aluminum [J].