溶液浓度对聚(3-丁基噻吩)溶液聚集态和薄膜结晶结构的影响

骆雪冰; 赵清清; 李琳; 郑浩; 郭亚楠; 彭娟

doi:10.11777/j.issn1000-3304.2023.23302

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溶液浓度对聚(3-丁基噻吩)溶液聚集态和薄膜结晶结构的影响

研究论文 | 更新时间：2024-09-25

- 溶液浓度对聚(3-丁基噻吩)溶液聚集态和薄膜结晶结构的影响
  增强出版
- Concentration Effect on the Solution-state Aggregation and Thin Film Crystalline Structures of Poly(3-butylthiophene)
- 高分子学报 2024年55卷第7期页码：910-920
- 作者机构：
  
  聚合物分子工程国家重点实验室复旦大学高分子科学系上海 200438
- 作者简介：
  
  E-mail: juanpeng@fudan.edu.cn
- 基金信息：
  
  国家自然科学基金(基金号 22173023);上海市自然科学基金(基金号 21ZR1405800)
- DOI：10.11777/j.issn1000-3304.2023.23302
  中图分类号：
- 纸质出版日期：2024-07-20，
  
  网络出版日期：2024-04-16，
  
  收稿日期：2023-12-30，
  
  录用日期：2024-02-06
- 稿件说明：
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骆雪冰, 赵清清, 李琳, 郑浩, 郭亚楠, 彭娟. 溶液浓度对聚(3-丁基噻吩)溶液聚集态和薄膜结晶结构的影响. 高分子学报, 2024, 55(7), 910-920

Luo, X. B.; Zhao, Q. Q.; Li, L.; Zheng, H.; Guo, Y. N.; Peng, J. Concentration effect on the solution-state aggregation and solid-state crystalline structures of poly(3-butylthiophene). Acta Polymerica Sinica, 2024, 55(7), 910-920
骆雪冰, 赵清清, 李琳, 郑浩, 郭亚楠, 彭娟. 溶液浓度对聚(3-丁基噻吩)溶液聚集态和薄膜结晶结构的影响. 高分子学报, 2024, 55(7), 910-920 DOI： 10.11777/j.issn1000-3304.2023.23302.

Luo, X. B.; Zhao, Q. Q.; Li, L.; Zheng, H.; Guo, Y. N.; Peng, J. Concentration effect on the solution-state aggregation and solid-state crystalline structures of poly(3-butylthiophene). Acta Polymerica Sinica, 2024, 55(7), 910-920 DOI： 10.11777/j.issn1000-3304.2023.23302.

摘要

共轭聚合物由于其特殊的力学、电性能或光电功能被广泛应用于各种器件中. 在溶液加工过程中，其在溶液中的分子链构象和溶液聚集态会由于记忆效应传递到薄膜中，从而对薄膜凝聚态结构和性能产生重要影响. 基于此，本文工作通过控制聚(3-丁基噻吩)(P3BT)的溶液浓度来调控P3BT在溶液中的链聚集态，进而深入研究溶液聚集态对P3BT薄膜的结晶结构包括晶型和结晶取向的影响，以及不同结晶结构和载流子传输性能的关系. 结果表明，P3BT在低浓度的溶液中链聚集程度较弱，进而在薄膜中形成丁基侧链非交叉式排列的晶型Ⅰ结构，且以edge-on结晶取向为主；而在更高浓度的溶液中形成聚集更强的聚集体，在薄膜中形成丁基侧链交叉式排列的晶型Ⅱ结构，结晶取向为flat-on与edge-on共存. 这些具有不同晶型和结晶取向的P3BT薄膜对有机场效应晶体管(OFET)的器件性能有直接影响.

Abstract

Conjugated polymers have been widely applied in various optoelectronic devices because of their special mechanical

electric

and optoelectronic properties. Usually

the fabrication of conjugated polymers is based on solution processing

and the conformation and solution aggregation state of conjugated polymers can be transferred to the solid state due to the memory effect. Therefore

the solution-state aggregation of conjugated polymers has an important impact on their crystalline structure and thus property in the film state. In this work

the concentration of poly(3-butylthiophene) (P3BT) solution was adjusted to control the chain aggregation in the solution

which in turn influenced the crystalline structure including form and crystal orientation of P3BT in thin films. Moreover

the correlation between different crystalline structures of P3BT and their charge transport properties based on organic field-effect transistors (OFET) was revealed. It showed P3BT aggregated weakly in low concentrations of solutions and thus produced form I crystals in edge-on orientation in the films

which had non-interdigitated packing of alkyl side chains and a larger side-chain stacking distance. In contrast

stronger aggregation of P3BT chains was observed in the solutions with high concentrations and form Ⅱ crystals in the mixed flat-on and edge-on orientations were produced in the films. These P3BT form Ⅱ crystals had interdigitated side chains and a smaller side-chain stacking distance than that of form Ⅰ. These P3BT films with different forms and crystal orientations were closely related to their charge transport characteristics.

关键词

聚噻吩溶液态聚集晶型结晶取向场效应晶体管

Keywords

PolythiophenesSolution-state aggregationFormCrystal orientationOrganic field-effect transistors

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