Efficient triplet harvesting by fluorescent molecules through exciplexes for high efficiency organic light-emitting diodes

被引：116

作者：

Park, Young-Seo ^{[1
]}

Kim, Kwon-Hyeon ^{[2
,3
]}

Kim, Jang-Joo ^{[1
,2
,3
]}

机构：

[1] Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 151744, South Korea

[2] Seoul Natl Univ, WCU Hybrid Mat Program, Seoul 151744, South Korea

[3] Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 151744, South Korea

来源：

APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 15期

关键词：

PHOSPHORESCENT IRIDIUM COMPLEXES; ACTIVATED DELAYED FLUORESCENCE; WHITE-LIGHT; EMISSION COLOR; ELECTROLUMINESCENCE; SINGLET; ANNIHILATION; INTERFACE; COMBINATORIAL; MECHANISM;

D O I：

10.1063/1.4802716

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Efficient triplet harvesting from exciplexes by reverse intersystem crossing (RISC) is reported using a fluorescent molecular system composed of the 4,4',4 ''-tris(N-carbazolyl)-triphenylamine and bis-4,6-(3,5-di-3-pyridylphenyl)-2-methylpyrimidine. The exciplex forming material system shows the efficient delayed fluorescence emission. As a result, almost 100% PL efficiency at 35K and 10% external quantum efficiency at 195K are achieved from the exciplex. The delayed fluorescence of the exciplex clearly demonstrates that a significant proportion of the triplet exciplexes is harvested through the RISC. (C) 2013 AIP Publishing LLC [http://dx.doi.org/10.1063/1.4802716]

引用

页数：5

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