摘要
本文制备了掺杂Ir(ppy)_(3)的红荧烯(Rubrene)型有机发光二极管(OLED),并利用磁电致发光效应(MEL)研究了高温环境中器件的光-电-磁性能及激子演化过程.研究发现,器件的发光均来自Rubrene,而Ir(ppy)_(3)不发光,其能量全部转移给了Rubrene.高温使得器件产生陷阱,阻碍了极化子对和激子的扩散与相互作用,导致MEL的特征线型由单重态激子分裂转变为系间窜越.利用自旋轨道耦合作用和能量转移,掺杂Ir(ppy)_(3)能有效增强Rubrene型OLED的光电性能和耐热性能.本研究不仅加深了对高温环境下Rubrene型OLED的光-电-磁性能及其微观机制的认识,同时为增强器件的热稳定性提供了一种新方法.
An organic light-emitting diode(OLED) based on rubrene doped with Ir(ppy)_(3) was fabricated, and the magnetoelectroluminescence(MEL) was used to analyze the optical-electric-magnetic properties and the exciton evolutions of the device under high temperature environment. The study finds that the light emission of the device comes from rubrene.Ir(ppy)_(3) does not emit light, and its energy is completely transferred to Rubrene. The high temperature causes traps in the device, which hinders the diffusion and interaction of polaron pairs and excitons, causing the characteristic line of MEL to change from singlet exciton splitting to intersystem crossing. Through spin-orbit coupling and energy transfer, doping Ir(ppy)_(3) can effectively enhance the optoelectronic performance and heat resistance of the OLED based on rubrene. This research not only deepens the understanding of the optical-electrical-magnetic properties and micro-mechanism of the OLED based on rubrene under high-temperature environments, but also provides a new method for enhancing the thermal stability of the device.
作者
朱洪强
屈芬兰
贾伟尧
汤仙童
赵茜
马彩虹
王影
叶晟楠
涂琳垚
熊祖洪
ZHU HongQiang;QU FenLan;JIA WeiYao;TANG XianTong;ZHAO Xi;MA CaiHong;WANG Ying;YE ShengNan;TU LinYao;XIONG ZuHong(School of Physical Science and Technology,Southwest University,Chongqing 400715,China;College of Physics and Electronic Engineering,Chongqing Normal University,Chongqing 401331,China)
出处
《中国科学：物理学、力学、天文学》
CSCD
北大核心
2021年第11期110-117,共8页
Scientia Sinica Physica,Mechanica & Astronomica
基金
国家自然科学基金(编号:11874305)
重庆市自然科学基金(编号:cstc2019jcyj-msxm0953)
重庆市教委科学技术研究计划(编号:KJQN201800510)资助项目。
关键词
有机发光二极管
高温
磁场效应
organic light-emitting diode
high temperature
magnetic field effect
