• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials transactions >Influence of the Performance of Organic Light Emitting Devices by Chemical Reaction at the Interface between Electron Transport Material and Ba Cathode
【24h】

Influence of the Performance of Organic Light Emitting Devices by Chemical Reaction at the Interface between Electron Transport Material and Ba Cathode

机译：电子传输材料与钡阴极界面化学反应对有机发光器件性能的影响

获取原文
获取原文并翻译 | 示例
       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Red electrophosphorescent organic light-emitting devices using red phosphorescent dopant, and tris-(8-hydroxyquinoline)-aluminum (Alq_3) and 2,9-dimethyl-4,7 diphenyl-l,10-phenanthroline (BCP) electron injecting have been fabricated. A device with Alq3 as electron transport layer shows high turn-on voltage (@ 1 cd/m~2) of 6.25 V, but a device with BCP does lower turn-on voltage of 5.0 V. Alq_3 and BCP have silimar lowest unoccupied molucular obital, 3.0 eV and 2.9 eV, which are the higher values than work function of Ba (2.7 eV). So, Ba cathode does not form energy barrier to inject electron to organic layer from simple energy band of view. However, these devices represent different injection properties, therefore we analyze the interface between organic layer and cathode. X-ray photoelectron spectroscopy depth profiling measurements reveal the strong chemical reaction and bonding of Ba with the C and O present in the Alq_3 molecules. Results show that the performance of the electrophosphorescent devices is mainly governed by the structure and the chemical reaction at the interface between Ba metal and electron-injecting material.
机译：制备了使用红色磷光掺杂剂以及三-（8-羟基喹啉）-铝（Alq_3）和2,9-二甲基-4,7二苯基-1,10-菲咯啉（BCP）电子注入的红色电致磷光有机发光器件。以Alq3作为电子传输层的器件显示出6.25 V的高开启电压（@ 1 cd / m〜2），但是具有BCP的器件却具有较低的5.0 V的开启电压。Alq_3和BCP的空分子为silimar最低Obital 3.0 eV和2.9 eV，这是高于Ba的功函数（2.7 eV）的值。因此，从简单的能带角度来看，Ba阴极不会形成将电子注入有机层的能垒。但是，这些器件代表了不同的注入特性，因此我们分析了有机层和阴极之间的界面。 X射线光电子能谱深度剖析测量表明，Ba与Alq_3分子中存在的C和O发生了强烈的化学反应和键合。结果表明，电致磷光器件的性能主要受钡金属与电子注入材料界面处的结构和化学反应支配。

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