Effects of Replacement on the Optical Properties of Narrow Bandgap Polymers: Comparing the Difference Between Thieno[3,2-b]thiophene Units and Thiophene Units

doi:10.1007/s40242-019-8212-8

高等学校化学研究 ›› 2019, Vol. 35 ›› Issue (1): 146-149.doi: 10.1007/s40242-019-8212-8

Effects of Replacement on the Optical Properties of Narrow Bandgap Polymers: Comparing the Difference Between Thieno[3,2-b]thiophene Units and Thiophene Units

CHEN Ying, WANG Wenyan, SUI Ning, WANG Yinghui, CHI Xiaochun, KANG Zhihui, ZHANG Hanzhuang, NI Moucui

Key Laboratory of Physics and Technology for Advanced Batteries, College of Physics, Jilin University, Changchun 130012, P. R. China

收稿日期:2018-06-26 修回日期:2018-11-09 出版日期:2019-02-01 发布日期:2018-12-05
通讯作者: SUI Ning, NI Moucui E-mail:sui@jlu.edu.cn;nimc@jlu.edu.cn
基金资助:
Supported by the National Natural Science Foundation of China(Nos.21573094, 51502109, 11774122, 11574112, 11474131), the National Found for Fostering Talents of Basic Science of China(No.J1103202) and the Science and Technology Projects in the 13th Five-year Plan of the Education Department of Jilin Province, China(No.2016-402).

Effects of Replacement on the Optical Properties of Narrow Bandgap Polymers: Comparing the Difference Between Thieno[3,2-b]thiophene Units and Thiophene Units

CHEN Ying, WANG Wenyan, SUI Ning, WANG Yinghui, CHI Xiaochun, KANG Zhihui, ZHANG Hanzhuang, NI Moucui

Key Laboratory of Physics and Technology for Advanced Batteries, College of Physics, Jilin University, Changchun 130012, P. R. China

Received:2018-06-26 Revised:2018-11-09 Online:2019-02-01 Published:2018-12-05
Contact: SUI Ning, NI Moucui E-mail:sui@jlu.edu.cn;nimc@jlu.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China(Nos.21573094, 51502109, 11774122, 11574112, 11474131), the National Found for Fostering Talents of Basic Science of China(No.J1103202) and the Science and Technology Projects in the 13th Five-year Plan of the Education Department of Jilin Province, China(No.2016-402).

摘要/Abstract

摘要： The effects of replacement on the optical properties of diketopyrrolopyrrole (DPP)-based polymers were discussed through replacing the thieno [3, 2-b]thiophene units by thiophene units. It is easy to see that the role of replacement would lead to blue shift of steady-state absorption spectrum when thieno [3, 2-b]thiophene units is replaced by thiophene units. Meanwhile, the transient absorption data indicate that the role of replacement would not change the relaxation mechanism of polymer, but is able to adjust the photo-excitation relaxation rate of polymer. Their intensity-dependent dynamic curves show that the exciton-exciton annihilation (EEA) would participate in the relaxation process when the polymer is in the aggregation. Through comparing the EEA data between the polymers, it is found that the role of replacement would change the spatial distribution of exciton.

关键词: Transient absorption spectroscopy, Dynamics, Thieno[3,2-b]thiophene, Replacement

Abstract: The effects of replacement on the optical properties of diketopyrrolopyrrole (DPP)-based polymers were discussed through replacing the thieno [3, 2-b]thiophene units by thiophene units. It is easy to see that the role of replacement would lead to blue shift of steady-state absorption spectrum when thieno [3, 2-b]thiophene units is replaced by thiophene units. Meanwhile, the transient absorption data indicate that the role of replacement would not change the relaxation mechanism of polymer, but is able to adjust the photo-excitation relaxation rate of polymer. Their intensity-dependent dynamic curves show that the exciton-exciton annihilation (EEA) would participate in the relaxation process when the polymer is in the aggregation. Through comparing the EEA data between the polymers, it is found that the role of replacement would change the spatial distribution of exciton.

Key words: Transient absorption spectroscopy, Dynamics, Thieno[3,2-b]thiophene, Replacement

CHEN Ying, WANG Wenyan, SUI Ning, WANG Yinghui, CHI Xiaochun, KANG Zhihui, ZHANG Hanzhuang, NI Moucui. Effects of Replacement on the Optical Properties of Narrow Bandgap Polymers: Comparing the Difference Between Thieno[3,2-b]thiophene Units and Thiophene Units[J]. 高等学校化学研究, 2019, 35(1): 146-149.

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Effects of Replacement on the Optical Properties of Narrow Bandgap Polymers: Comparing the Difference Between Thieno[3,2-b]thiophene Units and Thiophene Units

Effects of Replacement on the Optical Properties of Narrow Bandgap Polymers: Comparing the Difference Between Thieno[3,2-b]thiophene Units and Thiophene Units

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