查看更多>>摘要：Owing to their distinctive optical and physical properties,organic-inorganic hybrid perovskite materials have gained significant atten-tion in the field of electronic devices,especially solar cells.The achievement of high-performance solar cells hinges upon the utiliza-tion of top-notch perovskite thin films.Nevertheless,the fabrication process involving solutions and the polycrystalline nature of per-ovskite result in the emergence of numerous defects within the perovskite films,consequently exerting a deleterious influence on the overall performance and stability of the devices.Improving the performance and stability of perovskite solar cells by additive engi-neering to suppress/passivate defects is a viable approach,which involves hydrogen bond interactions in these device engineering processes.This review explores the intrinsic hydrogen bonds in methylammonium and formamidium lead triiodide,while also consid-ering cation rotations,phase transitions,and stability.Moreover,the review classifies additives into distinct categories,including or-ganic small molecules,polymers,nanodots,classical salts,ionic liquids,and molten salts.The various forms and characterization tech-niques of hydrogen bonds are discussed,as well as their potential synergistic effects in conjunction with other chemical interactions.Furthermore,this review offers insights into the potential utilization of hydrogen bonds to further enhance the performance and sta-bility of devices.
查看更多>>摘要：In the last few years,organic solar cells(OSCs)have made significant progress in photovoltaic performance,mainly due to the innova-tive development of active layer materials,especially Y-series and related derivatives as acceptors which have become the key factor that boosts the power conversion efficiency.Recently,to achieve high-performance OSCs,an emerging molecular design strategy of applying flexible alkyl units as linkers to construct non-fully conjugated acceptors has been developed and addressed great attention.This review highlights the non-fully conjugated photovoltaic materials with Y-series backbone that enable high-performance OSCs.Impressive OSCs have been achieved by some representative non-fully conjugated material systems.The related molecular design strategies are discussed in detail.Finally,a brief summary and future prospect are provided in advancing the non-fully conjugated photovoltaic materials with Y-series backbone towards the brighter future.
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