Efficient up-conversion of triplet excitons into a singlet state and its application for organic light emitting diodes

被引：1006

作者：

Endo, Ayataka ^{[1
]}

Sato, Keigo ^{[1
]}

Yoshimura, Kazuaki ^{[2
]}

Kai, Takahiro ^{[3
]}

Kawada, Atsushi ^{[3
]}

Miyazaki, Hiroshi ^{[3
]}

Adachi, Chihaya ^{[1
]}

机构：

[1] Kyushu Univ, Ctr Organ Photon & Elect Res OPERA, Nishi Ku, Fukuoka 8190395, Japan

[2] Nippon Steel Chem Co Ltd, Basic Res Labs, Fukuoka 8048503, Japan

[3] Nippon Steel Chem Co Ltd, Funct Mat Labs, Fukuoka 8048503, Japan

来源：

APPLIED PHYSICS LETTERS | 2011年 / 98卷 / 08期

关键词：

ACTIVATED DELAYED FLUORESCENCE; PHOSPHORESCENCE;

D O I：

10.1063/1.3558906

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A material possessing a very small energy gap between its singlet and triplet excited states, Delta E1-3, which allows efficient up-conversion of triplet excitons into a singlet state and leads to efficient thermally activated delayed fluorescence (TADF), is reported. The compound, 2-biphenyl-4,6-bis(12-phenylindolo[2,3-a] carbazole-11-yl)-1,3,5-triazine, breaks the restriction of a large energy gap, with a Delta E1-3 of just 0.11 eV, while maintaining a high fluorescent radiative decay rate (k(r) similar to 10(7)). The intense TADF provides a pathway for highly efficient electroluminescence. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3558906]

引用

页数：3

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