Fine-tuning Molecular Self-assembly Behavior of Poly(thiophene-quinoxaline) Derivatives <italic style="font-style: italic">via</italic> Side-chain Engineering

KONG Xiao-lei; ZHANG Ming-yue; ZHANG Jin-yuan; LI Yong-fang; SUN Chen-kai

doi:10.14028/j.cnki.1003-3726.2026.26.057

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Fine-tuning Molecular Self-assembly Behavior of Poly(thiophene-quinoxaline) Derivatives via Side-chain Engineering

更新时间：2026-05-29

- Fine-tuning Molecular Self-assembly Behavior of Poly(thiophene-quinoxaline) Derivatives via Side-chain Engineering
- Polymer Bulletin Vol. 39, Issue 6, Pages: 920-927(2026)
- 作者机构：
  
  郑州大学化学学院　郑州 450001
  中国科学院化学研究所北京分子科学国家研究中心有机固体院重点实验室　北京 100190
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2026.26.057
  CLC：
- Received：13 February 2026，
  
  Accepted：05 March 2026，
  
  Online First：11 May 2026，
  
  Published：20 June 2026
- 稿件说明：
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孔晓磊, 张明月, 章津源, 李永舫, 孙晨凯. 通过侧链工程精细调控聚噻吩–喹喔啉衍生物的分子自组装行为. 高分子通报, 2026, 39(6), 920–927.

Kong, X. L.; Zhang, M. Y.; Zhang, J. Y.; Li, Y. F.; Sun, C. K. Fine-tuning molecular self-assembly behavior of Poly(thiophene-quinoxaline) derivatives via side-chain Engineering. Polym. Bull. (in Chinese), 2026, 39(6), 920–927.
孔晓磊, 张明月, 章津源, 李永舫, 孙晨凯. 通过侧链工程精细调控聚噻吩–喹喔啉衍生物的分子自组装行为. 高分子通报, 2026, 39(6), 920–927. DOI： 10.14028/j.cnki.1003-3726.2026.26.057.

Kong, X. L.; Zhang, M. Y.; Zhang, J. Y.; Li, Y. F.; Sun, C. K. Fine-tuning molecular self-assembly behavior of Poly(thiophene-quinoxaline) derivatives via side-chain Engineering. Polym. Bull. (in Chinese), 2026, 39(6), 920–927. DOI： 10.14028/j.cnki.1003-3726.2026.26.057.

摘要

有机太阳电池(OSCs)中活性层材料的自组装特性对于实现理想的活性层形貌、优异的光伏性能而言至关重要。本工作通过在聚合物给体PTQ10的主链中引入具有不同侧链的第三组分合成了2种新型的聚噻吩–喹喔啉(PTQ)衍生物，并系统地考察了侧链结构变化对聚合物光电性质、分子堆积行为及器件光伏性能的调控规律。与PTQ10相比，第三组分中烷氧基侧链的长度和类型对PTQ衍生物自身的电化学和光学特性影响较小，但对材料的自组装特性和堆积取向影响显著。得益于更加紧密且长程有序的分子堆积方式，基于PTQ21的器件表现出更高且更为均衡的载流子传输能力、显著增强的激子解离与电荷收集效率，最终取得了19.22%的优异效率。本工作证实了侧链工程对于精细化调控聚合物材料自组装行为的重要性和可行性，为未来开发兼具高性能与低成本优势的新型聚合物给体材料提供了参考。

Abstract

The self-assembly characteristics of active layer materials in organic solar cells (OSCs) are crucial for achieving an ideal active layer morphology and excellent photovoltaic performance. In this work

two novel poly(thiophene-quinoxaline) (PTQ) derivatives were synthesized by introducing a third component with different side chains into the backbone of polymer donor PTQ10

and the influence of side chain structure on the optoelectronic properties

molecular aggregation behavior

and photovoltaic performance for polymer materials was investigated in detail. Compared with PTQ10

the length and type of alkoxy side chains in the third component has little effect on the electrochemical and optical properties of PTQ derivatives

but significantly impacts their self-assembly characteristics and packing orientation. Benefiting from the tighter and more long-range ordered molecular packing properties

devices based on PTQ21 achieve higher and more balanced charge mobility

more efficient exciton dissociation and charge collection processes

ultimately realizing an outstanding efficiency of 19.22%. This work confirms the importance and feasibility of side-chain engineering for finely tuning the self-assembly behavior of polymer materials

and provides significant reference value and guidance for the future development of novel polymer donor materials with the merits of low cost and high performance.

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Fine-tuning Molecular Self-assembly Behavior of Poly(thiophene-quinoxaline) Derivatives via Side-chain Engineering

DOI：10.14028/j.cnki.1003-3726.2026.26.057

摘要

Abstract

关键词

Keywords

references