Effects of Replacement on the Optical Properties of Narrow Bandgap Polymers: Comparing the Difference Between Thieno[3,2-b]thiophene Units and Thiophene Units |
| |
Authors: | CHEN Ying WANG Wenyan SUI Ning WANG Yinghui CHI Xiaochun KANG Zhihui ZHANG Hanzhuang NI Moucui |
| |
Institution: | Key Laboratory of Physics and Technology for Advanced Batteries, College of Physics, Jilin University, Changchun 130012, P. R. China |
| |
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. |
| |
Keywords: | Transient absorption spectroscopy Dynamics Thieno[3 2-b]thiophene Replacement |
本文献已被 维普 万方数据 等数据库收录! |
| 点击此处可从《高等学校化学研究》浏览原始摘要信息 |
| 点击此处可从《高等学校化学研究》下载免费的PDF全文 |
|