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 mat...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-γand PDBQx-β,integrating a dibenzo[f,h]quinoxaline unit and a two-dimensional benzodithiophene unit linked by alkyl-thiopheneπ-spacers.Optimized molecular design of PDBQx-βenables 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.展开更多
基金support from the Beijing Municipal Science&Technology Commission(2254104)support from National Natural Science Foundation of China(NSFC,52120105005)support from NSFC(52473166).We thank the 1W1A Diffuse X-ray Scattering Beamline of Beijing Synchrotron Radiation Facility(https://cstr.cn/31109.02.BSRF.1W1A)for providing technical support and assistance in GIWAXS data collection.
文摘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-γand PDBQx-β,integrating a dibenzo[f,h]quinoxaline unit and a two-dimensional benzodithiophene unit linked by alkyl-thiopheneπ-spacers.Optimized molecular design of PDBQx-βenables 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.
