100% fluorescence efficiency of 4,4′-bis[(N-carbazole)styryl]biphenyl in a solid film and the very low amplified spontaneous emission threshold -: art. no. 071110

被引：152

作者：

Aimono, T ^{[1
]}

Kawamura, Y ^{[1
]}

Goushi, K ^{[1
]}

Yamamoto, H ^{[1
]}

Sasabe, H ^{[1
]}

Adachi, C ^{[1
]}

机构：

[1] CIST, Dept Photon Mat Sci, Chitose, Hokkaido 75865, Japan

来源：

APPLIED PHYSICS LETTERS | 2005年 / 86卷 / 07期

关键词：

D O I：

10.1063/1.1867555

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We examined the amplified spontaneous emission (ASE) characteristics of fluorescent styryl benzene derivatives doped into a 4,4'-di(N-carbazolyl)biphenyl (CBP) host. In particular, 4,4'-bis[(N-carbazole)styryl]biphenyl (BSB-Cz) demonstrated an extremely low ASE threshold of E-th = 0.32 +/- 0.05 muJ/cm(2). We observed that the 6 wt %-BSB-Cz:CBP film has an ultimate photoluminescence (PL) quantum efficiency of Phi(PL) = 100% and a short transient lifetime of tau(f) = 1.0 +/- 0.1 ns, leading to a large radiative decay rate of k(r) = 1 x 10(9) s(-1). We demonstrated that the extremely low ASE threshold originated from the large radiative decay rate of BSB-Cz. (C) 2005 American Institute of Physics.

引用

页码：1 / 3

页数：3

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