Non-halogenated Solvent Processable Wide Bandgap Polymer Based on Quinoxaline Units with Isomerized Side Chain for High-efficiency Organic Solar Cells

ZHANG Rong-yue; SHEN Shuai-shuai; ZHOU Yuan-yuan; LI Miao; SONG Jin-sheng

doi:10.14028/j.cnki.1003-3726.2026.26.090

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Non-halogenated Solvent Processable Wide Bandgap Polymer Based on Quinoxaline Units with Isomerized Side Chain for High-efficiency Organic Solar Cells

更新时间：2026-06-12

- Non-halogenated Solvent Processable Wide Bandgap Polymer Based on Quinoxaline Units with Isomerized Side Chain for High-efficiency Organic Solar Cells
- Polymer Bulletin (2026)
- 作者机构：
  
  河南大学纳米科学与工程研究院　开封　475004
  河南师范大学材料科学与工程学院　新乡　453007
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2026.26.090
  CLC：
- Received：27 February 2026，
  
  Accepted：10 April 2026，
- 稿件说明：
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张荣玥, 申帅帅, 周圆圆, 李淼, 宋金生. 基于非卤溶剂加工的喹喔啉类宽带隙聚合物给体材料：侧链位置异构对光伏性能的影响. 高分子通报, doi: 10.14028/j.cnki.1003-3726.2026.26.090

Zhang, R. Y.; Shen, S. S.; Zhou, Y. Y.; Li, M. ; Song, J. S. Non-halogenated solvent processable wide bandgap polymer based on quinoxaline units with isomerized side chain for high-efficiency organic solar cells. Polym. Bull. (in Chinese), doi: 10.14028/j.cnki.1003-3726.2026.26.090
张荣玥, 申帅帅, 周圆圆, 李淼, 宋金生. 基于非卤溶剂加工的喹喔啉类宽带隙聚合物给体材料：侧链位置异构对光伏性能的影响. 高分子通报, doi: 10.14028/j.cnki.1003-3726.2026.26.090 DOI：

Zhang, R. Y.; Shen, S. S.; Zhou, Y. Y.; Li, M. ; Song, J. S. Non-halogenated solvent processable wide bandgap polymer based on quinoxaline units with isomerized side chain for high-efficiency organic solar cells. Polym. Bull. (in Chinese), doi: 10.14028/j.cnki.1003-3726.2026.26.090 DOI：

摘要

喹喔啉单元由于适中的缺电子性和多位点的可修饰性，被广泛用来构筑高效宽带隙聚合物给体材料。本研究利用苯侧基取代的缺电子喹喔啉单元，设计合成了2种聚合物给体材料PQx-1和PQx-2。苯侧基的引入可以改善材料的溶解性，同时苯侧基上烷氧链位置的异构可以显著影响材料的性能。当烷基链的位置在苯的间位时，聚合物PQx-2展现了更深的HOMO能级、合适的相分离形貌和更高的空穴/电子迁移率。最终，使用非卤溶剂邻二甲苯作为加工溶剂，PQx-2:BTP-eC9器件的PCE可以高达17.16%，显著高于烷氧链对位取代的PQx-1的光伏性能。研究结果表明，侧基位置异构可以有效调控材料的光伏性能，并为环境友好型聚合物给体材料的开发提供了可行的策略。

Abstract

Quinoxaline units have been widely employed in the construction of high-performance wide-bandgap polymer donors due to their moderate electron-deficient characteristic

strong quinoid form and multiple sites for structural modification. In this work

two novel polymer donors

PQx-1 and PQx-2

are designed and synthesized using phenyl-substituted quinoxaline as the electron-deficient unit. The positional isomerism of the alkoxy chain on the phenyl group can significantly influence the material properties. When the alkoxy chain is located at the meta-position of phenyl group

polymer PQx-2 exhibits a deeper HOMO energy level

favorable phase-separated morphology

and higher hole/electron mobilities compared with polymer PQx-1 featuring para-position substituted phenyl group. Consequently

the device based on PQx-2:BTP-eC9 can achieve a remarkable power conversion efficiency (PCE) of 17.16% using the non-halogenated solvent o-xylene as the processing solvent

significantly outperforming the photovoltaic performance of polymer PQx-1. The results demonstrate that positional isomerism of side chains can effectively tune the photovoltaic properties of materials

providing a viable strategy for the development of non-halogenated solvent processable wide bandgap polymer.

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references

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