近日，四川大学程沛团队研究了基于高扭曲联苯酰亚胺的高效有机光伏宽禁带聚合物供体。相关论文于2025年7月29日发表在《中国化学》杂志上。

研究组设计并合成了一系列基于高扭曲联苯亚胺和苯二噻吩的新型聚合物，具有优异的热稳定性、强的可见光谱吸收和宽的带隙。通过战略性地调整连接位置和整合噻吩桥，这些聚合物的光学性质、前沿轨道的能级和链间堆叠被精心定制。

基于这些聚合物供体的有机太阳能电池表明，具有4,4 ''键和噻吩桥的ZP4实现了4.10%的最高功率转换效率，这与基于更平面的噻吩亚胺的类似聚合物相当。该研究挑战了传统观点，即结构平面性对于高性能OPV聚合物至关重要，强调了非平面单元和超越平面性的更广泛设计策略的潜力。

附：英文原文

Title: Wide Bandgap Polymer Donors Based on Highly Twisted Biphenyl Imide for Efficient Organic Photovoltaics†

Author: Weiyi Zhou, Xianqi Shen, Xue Yan, Dunyu Chai, Feifei Wu, Hongxiang Li, Xipo Zhao, Pei Cheng

Issue&Volume: 2025-07-29

Abstract: A series of novel polymers based on highly twisted biphenyl imide and benzodithiophene have been designed and synthesized, exhibiting excellent thermal stability, strong absorption in the visible spectrum, and wide bandgaps. By strategically adjusting linkage positions and integrating thiophene bridges, the optical properties, energy levels of frontier orbitals, and interchain stacking of these polymers were meticulously tailored. Organic solar cells based on these polymer donors revealed that ZP4, featuring 4,4’-linkages and thiophene bridges, achieved the highest power conversion efficiency of 4.10%, which is comparable to that of analogous polymers based on more planar bithiophene imide. This study challenges the conventional belief that structural planarity is essential for high-performance OPV polymers, underscoring the potential of non-planar units and broader design strategies beyond planarity.

DOI: 10.1002/cjoc.70200

Source: https://onlinelibrary.wiley.com/doi/10.1002/cjoc.70200