| 刘春玲,侯雪怡,孙继芳,路莹,姜文龙.MgF2缓冲层对蓝光OLED性能的影响[J].光电子激光,2014,(7):1269~1273 |
| MgF2缓冲层对蓝光OLED性能的影响 |
| Effects of the MgF2buffer layer on the properties of bule organic light-emitting diodes |
| 投稿时间：2013-11-27 |
| DOI： |
| 中文关键词: 有机电致发光器件(OLED) MgF2缓冲层 发光效率 蓝光 |
| 英文关键词:organic light-emitting diodes (OLEDs) MgF2buffer layer curren t efficiency blue light |
| 基金项目:国家青年基金(10804036)、吉林省科技发展计划(20100510,20101512,20110320,201215221)、吉林省教育厅“十二五”科研计划([2014]第491号,[2012]第175号,[2012]第176号)和吉林师范大学研究生创新计划(201113)资助项目 (吉林师范大学 信息技术学院,吉林 四平 136000) |
|
| 摘要点击次数: 2762 |
| 全文下载次数: 166 |
| 中文摘要: |
| 为了提高蓝光有机电致发光器件(OLED)的发光性 能,将MgF2缓冲层插入ITO阳极与空穴传输层 NPB之间,通过优化MgF2的厚度,制备了结构为ITO/MgF2(x nm)/NPB(50nm)/DPVBi:DSA-ph(30 nm)/Alq3(30nm)/LiF(0.6nm)/Al(100nm)的高性能蓝光器件。实验结果表 明,MgF2厚为1.0 nm时,器件 性能最佳,对应的器件最大电流效率达到5.51 cd/A, 最大亮 度为23290 cd/m2(10.5V),与没有MgF2缓冲层的标准器件相比,分别提高47.3%和25.2%。对ITO表面的功函数测量结果表明,MgF2缓冲 层可以有效修饰ITO表面,降低ITO与NPB之间的势垒高度差,改善空穴的注入效率,从而导 致电子和 空穴的注入更加平衡,激发机制更高效,实现了高性能的蓝光发射,为实现高效而稳定的全 彩显示和白光照明奠定了基础。 |
| 英文摘要: |
| In order to improve the luminescence properties of the blue organic li ght-emitting diodes (OLEDs),a thin buffer layer of MgF2is sandwiched betwee n the indium-tin-oxide (ITO) and the hole transporting layer of NPB in OLEDs.The structure is ITO/MgF2(x nm)/NPB(50nm)/DPVBi:DSA-ph(30nm)/Alq3(30nm)/LiF (0.6nm)/Al (100nm).By optimizing th e thickness of MgF2buffer layer,the optimized OLED with a 1.0nm MgF2is obtained.The expe rimental results indicate that the devices with MgF2thin layer of 1.0nm can achieve a peak cu rrent efficiency of 5.51cd/A and the maximum luminance of 23290cd/m2( at 10.5V),which are improved by 47.3% and 25.2%,respectively,compared with the standard device without MgF2buffer l ayer.At the same time,the results of the measurement of the surface work function of ITO show th at the buffer layer of MgF2can modify the surface of the ITO and effectively decrease the b arrier height between ITO and NPB,improve the hole injection efficiency,which results in bet ter balanced injection of electron and hole,and more efficient exciton formation.So the perf ormance of the blue OLEDs has been improved,which makes the foundation in order to achieve high efficiency and stable full-color display and white OLEDs. |
| 查看全文 下载PDF阅读器 |
| 关闭 |
|
|
|
|
|