红荧烯类似物C38H24S2 的单线态分裂过程

量子电子学报 ›› 2020, Vol. 37 ›› Issue (6): 633-640.

• 光谱 • 下一篇

红荧烯类似物C38H24S2 的单线态分裂过程

秦朝朝1;2, 宋迪迪1;2, 周忠坡1;2∗

1 河南师范大学物理学院, 河南新乡453007; 2 河南省红外材料光谱测量与应用重点实验室, 河南新乡453007

收稿日期:2020-04-13 修回日期:2020-08-22 出版日期:2020-11-28 发布日期:2020-11-28
通讯作者: E-mail: zpzhou@htu.edu.cn E-mail: zpzhou@htu.edu.cn
作者简介:秦朝朝( 1984 - ), 河南新乡人, 博士, 副教授, 硕士生导师, 主要从事新型光电材料体系的超快光谱方面的研究。 E-mail:qinch@hotmail.com
基金资助:
Supported by National Natural Science Foundation of China (国家自然科学基金, 12074104, 11804084), Key Scientific & Technological Project of Henan Province (河南省科技攻关研究项目, 182102210369), Key Projects of Henan Education Committee (河南省教育厅重点项目, 19A140011), Henan Provincial Colleges and Universities of Training Plan for Young Key Teachers(河南省高等学校青年骨干教师培养计划, 2019GGJS065)

Singlet exciton fission in rubrene analogueue C38H24S2

QIN Chaochao1;2, SONG Didi1;2, ZHOU Zhongpo1;2∗

1 School of Physics, Henan Normal University, Xinxiang 453007, China; 2 Henan Key Laboratory of Infrared Materials & Spectrum Measurements and Applications, Xinxiang 453007, China

Received:2020-04-13 Revised:2020-08-22 Published:2020-11-28 Online:2020-11-28

摘要/Abstract

摘要： 单线态分裂可以规避光电转换中的能量损失, 从而提高光电转换效率。利用飞秒时间分辨瞬态吸收光谱技术研究了在不同激发条件下溶于甲苯溶液的红荧烯类似物C38H24S2 的激发态动力学过程。在550 nm 和365 nm 光激发下, 激发单线态与基态分子发生碰撞, 分别在8.2 ps 和3 ps 时产生了关联的三线态激子对。但在550 nm 光激发下未观察到独立的三线态激子信号; 而在365 nm 光激发下, 关联的三线态激子对的诱导吸收信号发生了转移, 在探测波长550 nm 附近观察到独立的三线态激子的吸收。在460 nm 光激发下, 利用奇异值分解的方法在瞬态吸收光谱中观察到了单线态分裂过程。

关键词: 光谱学, 单线态分裂, 飞秒时间分辨瞬态吸收光谱, 红荧烯类似物C38H24S2, 三线态激子, 超快动力学

Abstract: Singlet fission can circumvent energy-loss and improve the photoelectric conversion efficiency of solar cells. The excited state dynamics of rubrene analogueue C38H24S2 in toluene solution under different excitation conditions is investigated using femtosecond time-resolved transient absorption spectroscopy. Under the excitation of 550 nm and 365 nm, the excited singlet excitons collide with ground state molecules, and the correlated triplet pairs are generated at 8.2 ps and 3 ps, respectively. However, no independent triplet state signal is observed with the excitation wavelength of 550 nm. While under the excitation of 365 nm, the induced absorption signal of the triplet pair shifts, and the absorption of independent triplet exciton is observed around the detection wavelength of 550 nm. Besides, the singlet fission is observed by using the singular value decomposition method in the transient absorption spectrum with the excitation wavelength of 460 nm.

Key words: spectroscopy, singlet fission, femtosecond time-resolved transient absorption spectrum; rubrene analogueue C38H24S2, triplet exciton, ultrafast dynamics

中图分类号:

O433

秦朝朝, 宋迪迪, 周忠坡, ∗. 红荧烯类似物C38H24S2 的单线态分裂过程[J]. 量子电子学报, 2020, 37(6): 633-640.

QIN Chaochao, SONG Didi, ZHOU Zhongpo, ∗. Singlet exciton fission in rubrene analogueue C38H24S2[J]. Chinese Journal of Quantum Electronics, 2020, 37(6): 633-640.

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红荧烯类似物C38H24S2 的单线态分裂过程

Singlet exciton fission in rubrene analogueue C38H24S2

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