首页> 外文会议>Conference on Organic Light-Emitting Materials and Devices VII; Aug 4-6, 2003; San Diego, California, USA >Improvement in the environmental stability of tris(8-hydroxyquinoline) aluminum by substitution of sulphonic acid in 8- hydroxyquinoline ligand
【24h】

Improvement in the environmental stability of tris(8-hydroxyquinoline) aluminum by substitution of sulphonic acid in 8- hydroxyquinoline ligand

机译:通过在8-羟基喹啉配体中取代磺酸来改善三(8-羟基喹啉)铝的环境稳定性

获取原文
获取原文并翻译 | 示例

摘要

Tris (8-hydroxyquinoline) aluminum (Alq_3) is a commonly used electron transporting and/or light emitting material in organic light emitting diodes (OLEDs). However, it is well known that Alq_3is very sensitive to atmosphere exposure and that photoluminescence of Alq_3 films decreases with the time of atmosphere exposure. Degradation is also a serious problem in Alq_3 based OLEDs. Several degradation mechanisms have been identified in these devices, including formation of unstable cationic species due to passage of holes. Therefore, there is lots of interest in improving the stability of Alq_3. We have synthesized Tris (8-hydroxyquinoline-5 sulphonic acid) aluminum (Al(qS)_3) in order to improve the stability. We performed electron spin resonance measurements on Alq_3 and Al(qS)_3 powders. Unlike Alq_3 which exhibited strong ESR signal, Al(qS)_3 produced no detectable ESR signal indicating absence of free radicals in this material. To test the environmental stability of Al(qS)_3 films, we have performed photoluminescence (PL) measurements in humid air at different temperatures and found that Al(qS)_3 exhibits improved stability. After comparing the stability of Alq_3 and Al(qS)_3 thin films, fabrication of the light emitting diodes with Al(qS)_3 emitting layer was attempted in order to compare the performance with Alq_3 based devices.
机译:三(8-羟基喹啉)铝(Alq_3)是有机发光二极管(OLED)中常用的电子传输和/或发光材料。然而,众所周知,Alq_3对暴露于大气非常敏感,并且Alq_3膜的光致发光随暴露于大气的时间而降低。降解也是基于Alq_3的OLED中的严重问题。在这些装置中已经确定了几种降解机理,包括由于空穴的通过而形成不稳定的阳离子物质。因此,对于改善Alq_3的稳定性有很多兴趣。为了提高稳定性,我们合成了Tris(8-hydroxyquinoline-5磺酸)铝(Al(qS)_3)。我们对Alq_3和Al(qS)_3粉末进行了电子自旋共振测量。与显示强ESR信号的Alq_3不同,Al(qS)_3没有产生可检测到的ESR信号,表明该材料中不存在自由基。为了测试Al(qS)_3薄膜的环境稳定性,我们在不同温度的潮湿空气中进行了光致发光(PL)测量,发现Al(qS)_3表现出更高的稳定性。在比较Alq_3和Al(qS)_3薄膜的稳定性之后,尝试制造具有Al(qS)_3发光层的发光二极管,以便与基于Alq_3的器件比较性能。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号