Perovskite photovoltaics upholds the most prominent position in the field of tandem technology development.In this aspect,the creation of perovskite material with suitable bandgap(≥1.65 eV)is necessary.And in order t...Perovskite photovoltaics upholds the most prominent position in the field of tandem technology development.In this aspect,the creation of perovskite material with suitable bandgap(≥1.65 eV)is necessary.And in order to achieve the best device characteristics,the high-quality film formation is crucial.To get a high-quality film,the solvent engineering approach stays at the forefront.However,although the solvent engineering was well discussed for such conventional material as MAPbI_(3),the field of wide bandgap perovskite materials is still lacking in this area.This paper presents the solvent engineering approach to improve the efficiency and stability of the conventional wide bandgap perovskite material Cs_(0.17)FA_(0.83)PbI_(1.8)Br_(1.2).Here we utilize several solvents such as traditional N,N-dimethylformamide,dimethyl sulfoxide,N-methyl-2-pyrrolidone and acetonitrile.It was demonstrated that implication of any binary DMF-X solvent improves the solar cell efficiency compared to the pure DMF solution,but the ratio of the X solvent is unique for every X and the foundation for the X influence is also unique.The addition of 2.4 M of DMSO is considered the best to improve the stability and efficiency of laboratory devices,however implementation of AcN allowed to produce 25 cm^(2)mini-modules with the PCE reaching 10%.展开更多
基金supported by Russian Science Foundation(project No.23-72-01114)funded by the Ministry of Science and Higher Education of the Russian Federation(project 122111700041-8).
文摘Perovskite photovoltaics upholds the most prominent position in the field of tandem technology development.In this aspect,the creation of perovskite material with suitable bandgap(≥1.65 eV)is necessary.And in order to achieve the best device characteristics,the high-quality film formation is crucial.To get a high-quality film,the solvent engineering approach stays at the forefront.However,although the solvent engineering was well discussed for such conventional material as MAPbI_(3),the field of wide bandgap perovskite materials is still lacking in this area.This paper presents the solvent engineering approach to improve the efficiency and stability of the conventional wide bandgap perovskite material Cs_(0.17)FA_(0.83)PbI_(1.8)Br_(1.2).Here we utilize several solvents such as traditional N,N-dimethylformamide,dimethyl sulfoxide,N-methyl-2-pyrrolidone and acetonitrile.It was demonstrated that implication of any binary DMF-X solvent improves the solar cell efficiency compared to the pure DMF solution,but the ratio of the X solvent is unique for every X and the foundation for the X influence is also unique.The addition of 2.4 M of DMSO is considered the best to improve the stability and efficiency of laboratory devices,however implementation of AcN allowed to produce 25 cm^(2)mini-modules with the PCE reaching 10%.
