Wide-Bandgap Pyrazine-Based Polymer Enables Efficient and Stable Organic Photovoltaic Modules for Multi-Scene Applications
Jing Peng , Jianqiu Wang , Enhui Zhai , Jiangbo Dai , Yafei Wang , Pengqing Bi , Huixue Li , Tao Zhang , Zhihao Chen , Ji Zhu , Le Yang , Feiwu Chen , Shaoqing Zhang , Jianhui Hou
Chinese Journal of Chemistry ›› 2026, Vol. 44 ›› Issue (3) : 328 -334.
Organic photovoltaic (OPV) cells hold great promise as next-generation green energy owing to their tunable photoelectronic properties and compatibility with large-area solution printing. However, most high-performance materials have been optimized primarily for standard sunlight, with limited strategies for multi-spectral illuminations. Here, we report two wide-bandgap donor polymers, PDBQx-γ and PDBQx-β, integrating a dibenzo[f,h]quinoxaline unit and a two-dimensional benzodithiophene unit linked by alkyl-thiophene π-spacers. Optimized molecular design of PDBQx-β enables enhanced molecular packing, favorable morphology, and superior charge transport, delivering a power conversion efficiency (PCE) of 13.7% for PDBQx-β:FTCC-Br based on single-junction OPV cells under AM 1.5G illumination. Furthermore, the fabricated large-area OPV modules (23.6 cm2) achieve remarkable PCEs of 26.4% under 660 nm laser, 20.8% under underwater illumination, and 27.3% under indoor light. This study demonstrates a molecular design strategy for wide-bandgap polymers intrinsically compatible with diverse light sources, advancing OPV technology toward multi-scene applications.
Organic photovoltaic cells / Wide bandgap / Power conversion efficiency / Multi-scene / Large-area modules
2025 SIOC, CAS, Shanghai, & WILEY-VCH GmbH
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