It is essential to enhance the thickness of the absorber layer for perovskite solar cells(PSCs)to improve device performance and reduce industry refinement.However,thick perovskite films(>1μm)are difficult to be f...It is essential to enhance the thickness of the absorber layer for perovskite solar cells(PSCs)to improve device performance and reduce industry refinement.However,thick perovskite films(>1μm)are difficult to be fabricated by employing traditional solvents,such as N,N-dimethylformamide(DMF),dimethyl sulfoxide(DMSO).Besides,it is a challenge to fabricate thick-film perovskite owing to the deteriorated surface morphology and serious defect density.Herein,a simple method was reported to deposit uniform pinhole-free perovskite films with a thickness of more than 2μm utilizing the methylamine acetate(MAAc)ionic liquid as the solvent.Combined with methylammonium chloride(MACl)as an additive,thick-film perovskite with~2μm in grain size and few grain boundaries(GBs)was prepared,which dramatically improved the perovskite crystal quality and enhanced carrier transport performance.The final PSCs exhibited a power conversion efficiency(PCE)of 20.16%.The device showed improved stability with 95%of its initial efficiency in a nitrogen environment over 5000 h.This work provides an alternative strategy to produce extremely efficient and stable thick-film PSCs.It can be believed that this device has great potential in the application of large areas and laminated PSCs.展开更多
基金financially supported by the Natural Science Foundation of China(No.51972172)Jiangsu Provincial Departments of Science and Technology(Nos.BE2022023 and BK20220010)+5 种基金the Innovation Project of Optics Valley Laboratory(No.OVL2021BG006)the Open Project Program of Wuhan National Laboratory for Optoelectronics(No.2021WNLOKF003)the Young 1000 Talents Global Recruitment Program of Chinathe Natural Science Basic Research Plan in Shaanxi Province of China(No.2021JLM-43)the Joint Research Funds of Department of Science and Technology of Shaanxi Province and Northwestern Polytechnical University(Nos.2020GXLH-Z-007 and 2020GXLH-Z-014)Jiangsu Excellent Postdoctoral Program。
文摘It is essential to enhance the thickness of the absorber layer for perovskite solar cells(PSCs)to improve device performance and reduce industry refinement.However,thick perovskite films(>1μm)are difficult to be fabricated by employing traditional solvents,such as N,N-dimethylformamide(DMF),dimethyl sulfoxide(DMSO).Besides,it is a challenge to fabricate thick-film perovskite owing to the deteriorated surface morphology and serious defect density.Herein,a simple method was reported to deposit uniform pinhole-free perovskite films with a thickness of more than 2μm utilizing the methylamine acetate(MAAc)ionic liquid as the solvent.Combined with methylammonium chloride(MACl)as an additive,thick-film perovskite with~2μm in grain size and few grain boundaries(GBs)was prepared,which dramatically improved the perovskite crystal quality and enhanced carrier transport performance.The final PSCs exhibited a power conversion efficiency(PCE)of 20.16%.The device showed improved stability with 95%of its initial efficiency in a nitrogen environment over 5000 h.This work provides an alternative strategy to produce extremely efficient and stable thick-film PSCs.It can be believed that this device has great potential in the application of large areas and laminated PSCs.
