High operational stability of electrophosphorescent devices
High operational stability of electrophosphorescent devices
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DOI：
10.1063/1.1489503
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发表时间：
2002-07-01
影响因子：
4
通讯作者：
Brown, JJ
中科院分区：
文献类型：
--
作者：
Kwong, RC;Nugent, MR;Brown, JJ
已经用多种空穴和激子阻挡材料制造了以三(2-苯基吡啶)铱作为绿色发光掺杂剂的电致磷光器件。采用双(2-甲基-8-喹啉)4-苯基苯酚铝(III) (III)双(2-甲基-8-喹啉基)4-苯基苯酚盐(BAlq)的器件在初始亮度为500 cd/m(2)下工作时效率为19 cd/A，预计使用寿命为10 000小时；或标准化为 100 cd/m(2) 的 50 000 小时。以双(2-苯基喹啉基-N,C-2')乙酰丙酮铱(III)作为掺杂剂发射体和BAlq作为空穴阻挡剂的橙红色电致磷光器件在300 cd/m(2)的初始亮度下表现出17.6 cd/A的最大效率和5000小时的预计工作寿命；或 15 000 小时归一化为 100 cd/m(2)。两个器件的平均电压增量为
Electrophosphorescent devices with fac-tris(2-phenylpyridine)iridium as the green emitting dopant have been fabricated with a variety of hole and exciton blocking materials. A device with aluminum(III)bis(2-methyl-8-quinolinato)4-phenylphenolate (BAlq) demonstrates an efficiency of 19 cd/A with a projected operational lifetime of 10 000 h, operated at an initial brightness of 500 cd/m(2); or 50 000 h normalized to 100 cd/m(2). An orange-red electrophosphorescent device with iridium(III) bis(2-phenylquinolyl-N,C-2')acetylacetonate as the dopant emitter and BAlq as the hole blocker demonstrates a maximum efficiency of 17.6 cd/A with a projected operational lifetime of 5000 h at an initial brightness of 300 cd/m(2); or 15 000 h normalized to 100 cd/m(2). The average voltage increase for both devices is