Direct Observation of Efficient Triplet-Triplet Energy Transfer in Phosphorescent Organic Light-Emitting Diode

被引：8

作者：

Fukagawa, Hirohiko ^{[1
]}

Shimizu, Takahisa ^{[1
]}

Osada, Yoshichika ^{[2
]}

Kamada, Taisuke ^{[2
]}

Kiribayashi, Yukihiro ^{[2
]}

Yamamoto, Toshihiro ^{[1
]}

Shimidzu, Naoki ^{[1
]}

机构：

[1] Japan Broadcasting Corp NHK, Sci & Technol Res Labs, Setagaya Ku, Tokyo 1578510, Japan

[2] Tokyo Univ Sci, Shinjuku Ku, Tokyo 1628610, Japan

来源：

APPLIED PHYSICS EXPRESS | 2013年 / 6卷 / 05期

关键词：

HIGHLY EFFICIENT; ELECTROLUMINESCENT DEVICES; COMPLEXES;

D O I：

10.7567/APEX.6.052104

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report on the energy transfer mechanism between the host and the iridium dopant in phosphorescent organic light-emitting diodes (PHOLEDs). The excited-state energies of the host and the dopant are carefully defined to discuss the energy transfer. The PHOLED using bis(benzo[h]quinolin-10-olato-kN,kO)beryllium(II) (Bebq(2)) as the host and bis(4-pentafluorophenyl-2-phenylpyridine)(acetylacetonate)iridium(III) (m-PF-py) as the dopant shows a maximum external quantum efficiency (eta(ext)) of about 15%, whereas the photoluminescence quantum yield of the emitting layer film is only 19%. The high eta(ext) of the PHOLED implies efficient triplet-triplet energy transfer from Bebq(2) to m-PF-py. (c) 2013 The Japan Society of Applied Physics

引用

页数：4

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