期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 54, 期 21, 页码 6222-6226出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201501396
关键词
nonlinear optics; pentacene; singlet fission; time-resolved spectroscopy
资金
- National Basic Research Program of China (MOST) [2013CB932903, 2012CB921801]
- National Science Foundation of China [91233103, 61108001, 11227406, 11321063]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
By creating two triplet excitons from one photo-excited singlet exciton, singlet fission in organic semiconductors has drawn tremendous attention for its potential applications in boosting the efficiency of solar conversion. Here, we show that this carrier-multiplication effect can also be used to dramatically improve the nonlinear optical response in organic materials. We have observed large optical nonlinearity with a magnitude of ((3)) up to 10(-9)esu in pentacene films, which is further shown to be a result of singlet fission by monitoring the temporal dynamics. The potential application of such efficient nonlinear optical response has been demonstrated with a singlet-fission-induced polarization rotation.
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