Non-fullerene acceptors with heteroatom substitution on the core moiety for efficient organic photovoltaics  

作　　者：Feng Qi Baobing Fan Qunping Fan Alex K.-Y.Jen 

机构地区：[1]Department of Chemistry,City University of Hong Kong,Kowloon,Hong Kong,the People's Republic of China [2]Hong Kong Institute for Clean Energy,City University of Hong Kong,Kowloon,Hong Kong,the People's Republic of China [3]College of Materials Science and Engineering,Qingdao University,Qingdao,People's Republic of China [4]State Key Laboratory for Mechanical Behavior of Materials,Xi'an Jiaotong University,Xi'an,People's Republic of China [5]Department of Materials Science&Engineering,University of Washington,Seattle,Washington,USA [6]State Key Laboratory of Marine Pollution,City University of Hong Kong,Kowloon,Hong Kong,the People's Republic of China

出　　处：《InfoMat》2024年第8期20-35,共16页信息材料（英文）

基　　金：City University of Hong Kong,Grant/Award Number:9380086;Innovation and Technology Commission of Hong Kong,Grant/Award Numbers:GHP/018/20SZ,MRP/040/21X;Environment and Ecology Bureau of Hong Kong,Grant/Award Number:202020164;Research Grants Council of Hong Kong,Grant/Award Numbers:11307621,C6023-19GF;Shenzhen Science and Technology Program,Grant/Award Number:SGDX20201103095412040;Guangdong Major Project of Basic and Applied Basic Research,Grant/Award Number:2019B030302007。

摘　　要：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.

关 键 词：core moiety heteroatom substitution near-infrared absorption non-fullerene acceptor organic photovoltaics reduced energy loss 

分 类 号：O62[理学—有机化学]