Ultrafast Dynamics of Long-Lived Bound Triplet Pair Generated by Singlet Fission in 6,13-Bis(triisopropylsilylethynyl) Pentacene

doi:10.1021/acs.jpcc.0c03566

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	Ultrafast Dynamics of Long-Lived Bound Triplet Pair Generated by Singlet Fission in 6,13-Bis(triisopropylsilylethynyl) Pentacene
	Z. L. Zhou; L. Ma; D. Q. Guo; X. Zhao; C. Wang; D. B. Lin; F. T. Zhang; J. H. Zhang and Z. G. Nie
	2020
发表期刊	Journal of Physical Chemistry C
ISSN	1932-7447
卷号	124 期号:27 页码:14503-14509
摘要	Singlet fission (SF) converts a singlet exciton into two triplet excitons and holds great potential in the photovoltaic field. The triplet pair state is proposed to play an important role in SF. However, the existence and character of the triplet pair state are still ambiguous to date. In this study, we directly observed the ultrafast formation of the long-lived bound triplet pair state in 6,13-bis(triisopropylsilylethynyl) pentacene polycrystalline film using sub-10-fs broadband transient absorption spectroscopy. The triplet pair state has strong absorption in the near-infrared region and shows distinct dynamic characteristics. It shows faster formation and relaxation compared to free triplet states. Diffusion-limited triplet-triplet annihilation was proved to be the major relaxation channel for both free triplets and bound triplet pairs. Moreover, the larger constraint coefficient obtained from triplet-triplet annihilation of the bound triplet pair state reveals the inherent coupling nature between its two constituent triplets.
DOI	10.1021/acs.jpcc.0c03566
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收录类别	SCI
语种	英语
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文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/64988
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	Z. L. Zhou,L. Ma,D. Q. Guo,et al. Ultrafast Dynamics of Long-Lived Bound Triplet Pair Generated by Singlet Fission in 6,13-Bis(triisopropylsilylethynyl) Pentacene[J]. Journal of Physical Chemistry C,2020,124(27):14503-14509.
APA	Z. L. Zhou.,L. Ma.,D. Q. Guo.,X. Zhao.,C. Wang.,...&J. H. Zhang and Z. G. Nie.(2020).Ultrafast Dynamics of Long-Lived Bound Triplet Pair Generated by Singlet Fission in 6,13-Bis(triisopropylsilylethynyl) Pentacene.Journal of Physical Chemistry C,124(27),14503-14509.
MLA	Z. L. Zhou,et al."Ultrafast Dynamics of Long-Lived Bound Triplet Pair Generated by Singlet Fission in 6,13-Bis(triisopropylsilylethynyl) Pentacene".Journal of Physical Chemistry C 124.27(2020):14503-14509.

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