Horizontal Orientation of a Linear-Shaped Platinum(II) Complex in Organic Light-Emitting Diodes with a High Light Out-Coupling Efficiency

被引：24
作者：
Taneda, Masatsugu
Yasuda, Takuma
Adachi, Chihaya [1 ]
机构：
[1] Kyushu Univ, BEANS Lab, Fukuoka 8190395, Japan
来源：
APPLIED PHYSICS EXPRESS | 2011年 / 4卷 / 07期
关键词：
PHOSPHORESCENT OLEDS; DEVICES; ELECTROPHOSPHORESCENCE; EMISSION;
D O I：
10.1143/APEX.4.071602
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A linear-shaped phosphorescent platinum(II) complex that adopts a horizontal orientation in amorphous films was synthesized. The complex possesses a photoluminescence quantum efficiency of Phi(PL) = 50 +/- 3% in thin films with the host of m-biscarbazolylbenzene and 4,4'-bis(N-carbazolyl)biPhenyl. Polarized emission from the edge of these thin films confirmed the horizontal orientation of the complex within them. An organic light-emitting diode containing the complex possessed a maximum external quantum efficiency of eta(EQE) = 15.8 +/- 3%. The light out-coupling efficiency of the device was estimated to be at least 4 = 32 +/- 3%, which was ascribed to the horizontal orientation of the complex. (C) 2011 The Japan Society of Applied Physics
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页数：3
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