期刊
JOURNAL OF CHEMICAL PHYSICS
卷 141, 期 24, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4904385
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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)
We conduct polarization-dependent ultrafast spectroscopy to study the dynamics of singlet fission (SF) in tetracene single crystals. The spectrotemporal species for singlet and triplet excitons in transient absorption spectra are found to be strongly dependent on probe polarization. By carefully analyzing the polarization dependence, the signals contributed by different transitions related to singlet excitons have been disentangled, which is further applied to construct the correlation between dynamics of singlet and triplet excitons. The anisotropy of exciton dynamics provides an alternative approach to tackle the long-standing challenge in understanding the mechanism of singlet fission in organic semiconductors. (c) 2014 AIP Publishing LLC.
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