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Heteroatom substitution-induced asymmetric A–D–A type non-fullerene acceptor for efficient organic solar cells 被引量:2
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作者 Chao Lia Jiali Song +6 位作者 Yunhao Cai Guangchao Han Wenyu Zheng Yuanping Yi Hwa Sook Ryu Han Young Woo Yanming Sun 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2020年第1期144-150,I0006,共8页
Research on asymmetric A–D–A structured non-fullerene acceptors has lagged far behind the development of symmetric counterpart.In this contribution,by simply replacing one sulfur atom in indacenodithiophene unit wit... Research on asymmetric A–D–A structured non-fullerene acceptors has lagged far behind the development of symmetric counterpart.In this contribution,by simply replacing one sulfur atom in indacenodithiophene unit with a selenium atom,an asymmetric building block Se PT and a corresponding asymmetric non-fullerene acceptor Se PT-IN have been developed.Asymmetric Se PT-IN achieved a high efficiency of 10.20% in organic solar cells when blended with PBT1-C,much higher than that of symmetric TPT-IN counterpart(8.91%).Our results demonstrated an effective heteroatom substitution strategy to develop asymmetric A–D–A structured non-fullerene acceptors. 展开更多
关键词 Asymmetric non-fullerene acceptors Heteroatom substitution Organic solar cells Power conversion efficiency
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Non-fullerene acceptors with heteroatom substitution on the core moiety for efficient organic photovoltaics
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作者 Feng Qi Baobing Fan +1 位作者 Qunping Fan Alex K.-Y.Jen 《InfoMat》 SCIE CSCD 2024年第8期20-35,共16页
Organic photovoltaics(OPVs)represent one of the most promising photovoltaic technologies owing to their high capacity to convert solar energy to electricity.With the continuous structure upgradation of photovoltaic ma... Organic photovoltaics(OPVs)represent one of the most promising photovoltaic technologies owing to their high capacity to convert solar energy to electricity.With the continuous structure upgradation of photovoltaic materials,especially that of non-fullerene acceptors(NFAs),the OPV field has witnessed rapid progress with power conversion efficiency(PCE)exceeding 19%.However,it remains challenging to overcome the intrinsic trade-off between the photocurrent and photovoltage,restricting the further promotion of the OPV efficiency.In this regard,it is urgent to further tailor the structure of NFAs to broaden their absorption spectra while mitigating the energy loss of relevant devices concomitantly.Heteroatom substitution on the fused-ringπ-core of NFAs is an efficient way to achieve this goal.In addition to improve the nearinfrared light harvest by strengthening the intramolecular charge transfer,it can also enhance the molecular stacking via forming multiple noncovalent interactions,which is favorable for reducing the energetic disorder.Therefore,in this review we focus on the design rules of NFAs,including the polymerized NFAs,of which the core moiety is substituted by various kinds of heteroatoms.We also afford a comprehensive understanding on the structure–propertyperformance relationships of these NFAs.Finally,we anticipate the challenges restricting the efficiency promotion and industrial utilization of OPV,and provide potential solutions based on the further heteroatom optimization on NFA core-moiety. 展开更多
关键词 core moiety heteroatom substitution near-infrared absorption non-fullerene acceptor organic photovoltaics reduced energy loss
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