Achieving high-performance perovskite solar modules(pero-SMs)over large areas under ambient conditions remains a significant barrier to the commercialization of perovskite photovoltaics.This challenge arises from the ...Achieving high-performance perovskite solar modules(pero-SMs)over large areas under ambient conditions remains a significant barrier to the commercialization of perovskite photovoltaics.This challenge arises from the strong solvent-perovskite coordination interactions in the hygroscopic perovskite precursor ink,which complicate the control of nucleation-growth kinetics and phase evolution during film formation in the presence of moisture,thereby hindering the formation of high-quality perovskite films.In this work,a“vip-solvent”additive strategy was developed by incorporating N,N-dimethylthioformamide(DMT)into the perovskite precursor ink to effectively modulate the coordination between the solvent and perovskite.It is demonstrated that DMT,structurally similar to the“main-solvent”system(DMF and DMSO),possesses lower coordination ability with Pb2+and forms non-covalent interactions with the primary solvents.These interactions weaken the solvent-perovskite coordination without sacrificing solubility,thereby stabilizing homogeneous nucleation and promoting direct crystallization from the sol-gel phase toα-FAPbI3.As a result,the ambient-printed FAPbI3 films exhibited high quality,with more compact grain stacking,smoother morphology,higher phase purity,and fewer defects.Consequently,the resulting perovskite solar cells(0.062 cm2)and pero-SMs(15.64 cm2)fabricated via blade coating under ambient conditions achieved remarkable power conversion efficiencies(PCEs)of 24.46%and 22.54%,respectively.展开更多
基金supported by the National Key Research and Development Program of China(Grant No.2022YFB4200302)the National Natural Science Foundation of China(Grant Nos.52325307,52273188,22075194)+1 种基金Department of Science and Technology of Jiangsu Province(No.BE2022023)the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD),Collaborative Innovation Center of Suzhou Nano Science and Technology,and the Key Laboratory of Polymeric Materials Design and Synthesis for Biomedical Function,Soochow University.
文摘Achieving high-performance perovskite solar modules(pero-SMs)over large areas under ambient conditions remains a significant barrier to the commercialization of perovskite photovoltaics.This challenge arises from the strong solvent-perovskite coordination interactions in the hygroscopic perovskite precursor ink,which complicate the control of nucleation-growth kinetics and phase evolution during film formation in the presence of moisture,thereby hindering the formation of high-quality perovskite films.In this work,a“vip-solvent”additive strategy was developed by incorporating N,N-dimethylthioformamide(DMT)into the perovskite precursor ink to effectively modulate the coordination between the solvent and perovskite.It is demonstrated that DMT,structurally similar to the“main-solvent”system(DMF and DMSO),possesses lower coordination ability with Pb2+and forms non-covalent interactions with the primary solvents.These interactions weaken the solvent-perovskite coordination without sacrificing solubility,thereby stabilizing homogeneous nucleation and promoting direct crystallization from the sol-gel phase toα-FAPbI3.As a result,the ambient-printed FAPbI3 films exhibited high quality,with more compact grain stacking,smoother morphology,higher phase purity,and fewer defects.Consequently,the resulting perovskite solar cells(0.062 cm2)and pero-SMs(15.64 cm2)fabricated via blade coating under ambient conditions achieved remarkable power conversion efficiencies(PCEs)of 24.46%and 22.54%,respectively.
