Geminate and Nongeminate Recombination of Triplet Excitons Formed by Singlet Fission

被引：77

作者：

Bayliss, Sam L. ^{[1
]}

Chepelianskii, Alexei D. ^{[1
,2
]}

Sepe, Alessandro ^{[1
]}

Walker, Brian J. ^{[1
]}

Ehrler, Bruno ^{[1
]}

Bruzek, Matthew J. ^{[3
]}

Anthony, John E. ^{[3
]}

Greenham, Neil C. ^{[1
]}

机构：

[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[2] Univ Paris 11, CNRS, LPS, UMR 8502, F-91405 Orsay, France

[3] Univ Kentucky, Dept Chem, Lexington, KY 40506 USA

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 112卷 / 23期

基金：

英国工程与自然科学研究理事会; 美国国家科学基金会;

关键词：

DETECTED MAGNETIC-RESONANCE; MOLECULAR-CRYSTALS; TETRACENE CRYSTALS; SOLAR-CELLS; ANNIHILATION; DYNAMICS; PAIRS; FLUORESCENCE; FILMS; PHOTOVOLTAICS;

D O I：

10.1103/PhysRevLett.112.238701

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the simultaneous observation of geminate and nongeminate triplet-triplet annihilation in a solution-processable small molecule TIPS-tetracene undergoing singlet exciton fission. Using optically detected magnetic resonance, we identify recombination of triplet pairs directly following singlet fission, as well as recombination of triplet excitons undergoing bimolecular triplet-triplet annihilation. We show that the two processes give rise to distinct magnetic resonance spectra, and estimate the interaction between geminate triplet excitons to be 60 neV.

引用

页数：5

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