Developing an efficient electron transport layer(ETL)through structural modification is essential to produce high-performance perovskite solar cell(PSC)devices.Specifically,the ETL should exhibit low defects,high opti...Developing an efficient electron transport layer(ETL)through structural modification is essential to produce high-performance perovskite solar cell(PSC)devices.Specifically,the ETL should exhibit low defects,high optical transparency,and charge selectivity for ideal electron transport.Herein,we demonstrate(i)the low-temperature fabrication of tin oxide(SnO_(2))ETLs with a bilayer structure,and(ii)inkjetprinting of triple-cation perovskite films.Through the combined use of spin-coating and spray deposition,the optimized SnO_(2)-bilayer ETL shows a nano-granule-textured surface,noticeably fewer defects,and a cascade conduction band position with the inkjet-printed perovskite film.The champion PSC device,based on the SnO_(2)-bilayer ETL and inkjet-printed perovskite film,recorded an outstanding power conversion efficiency(PCE)of~16.9%,which is significantly higher than the device based on the conventional SnO_(2)ETL(PCE~14.8%).The improved photovoltaic performance of the SnO_(2)-bilayer-based device arises mainly from more efficient charge transport and suppressed recombination at the ETL/perovskite interface.The SnO_(2)-bilayer ETL and inkjet-printed perovskite films demonstrated herein can be potentially used for large-scale manufacturing of photovoltaic modules.展开更多
基金financially supported by the Basic Science Research Program(NRF-2021R1A2C2004206)the Creative Materials Discovery Program(NRF-2017M3D1A1039287)through the National Research Foundation(NRF)of Korea,funded by the MSIT+1 种基金supported by the Technology Innovation Program(20016283)funded by the Ministry of Trade,Industry&Energy(MOTIE,Korea)supported by the selection of a research-oriented professor at Jeonbuk National University in 2023.
文摘Developing an efficient electron transport layer(ETL)through structural modification is essential to produce high-performance perovskite solar cell(PSC)devices.Specifically,the ETL should exhibit low defects,high optical transparency,and charge selectivity for ideal electron transport.Herein,we demonstrate(i)the low-temperature fabrication of tin oxide(SnO_(2))ETLs with a bilayer structure,and(ii)inkjetprinting of triple-cation perovskite films.Through the combined use of spin-coating and spray deposition,the optimized SnO_(2)-bilayer ETL shows a nano-granule-textured surface,noticeably fewer defects,and a cascade conduction band position with the inkjet-printed perovskite film.The champion PSC device,based on the SnO_(2)-bilayer ETL and inkjet-printed perovskite film,recorded an outstanding power conversion efficiency(PCE)of~16.9%,which is significantly higher than the device based on the conventional SnO_(2)ETL(PCE~14.8%).The improved photovoltaic performance of the SnO_(2)-bilayer-based device arises mainly from more efficient charge transport and suppressed recombination at the ETL/perovskite interface.The SnO_(2)-bilayer ETL and inkjet-printed perovskite films demonstrated herein can be potentially used for large-scale manufacturing of photovoltaic modules.
