Triplet exciton dynamics in rubrene single crystals

被引：101

作者：

Ryasnyanskiy, Aleksandr ^{[1
]}

Biaggio, Ivan ^{[1
]}

机构：

[1] Lehigh Univ, Dept Phys, Bethlehem, PA 18015 USA

来源：

PHYSICAL REVIEW B | 2011年 / 84卷 / 19期

关键词：

FIELD-EFFECT TRANSISTORS; DELAYED FLUORESCENCE; SEMICONDUCTORS; DIFFUSION; FISSION;

D O I：

10.1103/PhysRevB.84.193203

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The decay of the photoluminescence excited in rubrene single crystals by picosecond pulses is measured over 7 orders of magnitude and more than 4 time decades. We identify the typical decay dynamics due to triplet-triplet interaction. We show that singlet exciton fission and triplet fusion quantum yields in rubrene are both very large, and we directly determine a triplet exciton lifetime of 100 +/- 20 mu s, which explains the delayed buildup of a large photocurrent that has been reported earlier for low excitation densities.

引用

页数：4

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