Blue organic light emitting devices(OLEDs) with Alq, PBD, BBOT or F OXD as the electron transport layer were fabricated by a high vacuum multisource type organic molecular deposition system. The effect of various elec...Blue organic light emitting devices(OLEDs) with Alq, PBD, BBOT or F OXD as the electron transport layer were fabricated by a high vacuum multisource type organic molecular deposition system. The effect of various electron transport layers on the performances of OLED was studied. The result indicates that the performances of devices with electron transport layer added between emitter and cathode are increased greatly. It is found that device: ITO/TPD/PPCP/Alq/Al is optimal in structure compared with other devices. Its turn on voltage is 4 V. Its maximal brightness is 2 000 cd/m 2 and its maximal efficiency is 0.36 lm/W.展开更多
利用宽带有机半导体材料(2,9-二甲基-4,7-二苯基-1,10-菲啰啉,BCP)形成无序介观光学结构来提高蓝色顶发射有机电致发光器件(OLED)的出光效率,从而提升器件的外量子效率.基于BCP折射率匹配的作用,在顶电极上增加一层BCP薄膜,器件内的波...利用宽带有机半导体材料(2,9-二甲基-4,7-二苯基-1,10-菲啰啉,BCP)形成无序介观光学结构来提高蓝色顶发射有机电致发光器件(OLED)的出光效率,从而提升器件的外量子效率.基于BCP折射率匹配的作用,在顶电极上增加一层BCP薄膜,器件内的波导光能够被进一步散射出来,且由于此材料本身具有低的玻璃化转变温度,在一定的环境条件下(温度及湿度)下BCP易发生自聚集结晶而形成无序介观光学结构,藉此结构使原来被限制于表面等离激元(SPP)的能量而耦合成自由光场,从而被有效提取出来.通过BCP结构薄膜的作用,器件最大亮度从4500 cd m–2提升至9840 cd m–2,外量子效率(EQE)从0.42%提升至1.14%(提高了1.7倍),此外光谱也蓝移12 nm,实现了蓝色发光光谱的优化.展开更多
文摘Blue organic light emitting devices(OLEDs) with Alq, PBD, BBOT or F OXD as the electron transport layer were fabricated by a high vacuum multisource type organic molecular deposition system. The effect of various electron transport layers on the performances of OLED was studied. The result indicates that the performances of devices with electron transport layer added between emitter and cathode are increased greatly. It is found that device: ITO/TPD/PPCP/Alq/Al is optimal in structure compared with other devices. Its turn on voltage is 4 V. Its maximal brightness is 2 000 cd/m 2 and its maximal efficiency is 0.36 lm/W.
文摘利用宽带有机半导体材料(2,9-二甲基-4,7-二苯基-1,10-菲啰啉,BCP)形成无序介观光学结构来提高蓝色顶发射有机电致发光器件(OLED)的出光效率,从而提升器件的外量子效率.基于BCP折射率匹配的作用,在顶电极上增加一层BCP薄膜,器件内的波导光能够被进一步散射出来,且由于此材料本身具有低的玻璃化转变温度,在一定的环境条件下(温度及湿度)下BCP易发生自聚集结晶而形成无序介观光学结构,藉此结构使原来被限制于表面等离激元(SPP)的能量而耦合成自由光场,从而被有效提取出来.通过BCP结构薄膜的作用,器件最大亮度从4500 cd m–2提升至9840 cd m–2,外量子效率(EQE)从0.42%提升至1.14%(提高了1.7倍),此外光谱也蓝移12 nm,实现了蓝色发光光谱的优化.
基金supported by the National Key Basic Research Program of China(973)(2015CB932202,2012CB933301)National Natural Science Foundation of China(61274065,51173081,61136003,BZ2010043,21373114,21573111,21003076,61505086,21304047)+6 种基金Science Fund for Distinguished Young Scholars of Jiangsu Province,China(BK20160039)Ministry of Education of China(IRT1148)Natural Science Foundation of Jiangsu Province,China(BM2012010,BK20141424)Priority Academic Program Development of Jiangsu Provincial Higher Education Institutions,China(YX030001)Ordinary University Graduate Student Practical Innovation Projects of Jiangsu Province,China(SJLX15_0390)Pandeng Project of Nanjing University of Posts and Telecommunications,China(NY214085)Open Foundation from Jilin University,China(IOSKL2015KF32)~~
