Metal halide perovskite solar cells(PSCs)are anticipated to play a pivotal role in the next generation of photovoltaic technologies,but their unsatisfactory stability hinders further commercial applications.Particular...Metal halide perovskite solar cells(PSCs)are anticipated to play a pivotal role in the next generation of photovoltaic technologies,but their unsatisfactory stability hinders further commercial applications.Particularly,numerous interfacial defects and poor mechanical adhesion at the perovskite buried interface present a critical obstacle hindering power conversion efficiency(PCE)and longterm stability of PSCs.Here,different from conventional small-molecule or linear polymer interface modifiers,we introduce a star-shaped PMMA-b-PDMAEMA(S-MD,where PMMA=poly(methyl methacrylate)and PDMAEMA=poly(dimethylaminoethyl methacrylate))polymer as a multifunctional bridge-linking polymer for simultaneous defect passivation and mechanical reinforcement at the buried interface of inverted(p-i-n)PSCs.S-MD features a three-dimensional architecture with multiple extended conjugated arms,offering multiple Lewis base functional groups(e.g.,C=O and R-N(CH_(3))_(2))with a high density of multidentate coordination sites.These groups can effectively coordinate with electron-deficient defects at the perovskite buried interface,enabling improved crystallization,reduced defect density,and enhanced interfacial adhesion.As a result,the interfacial fracture strength increases from 0.13 to 1.66 MPa.The resultant device achieves a PCE of 26.35%(certified steady-state PCE of 25.96%).The flexible device retains over 90%of its initial efficiency after 3000 flexing cycles at a curvature radius of 6 mm(R=6 mm).This work highlights a multidentate coordinating,star-shaped polymer interface strategy that offers a promising pathway toward highly efficient and stable inverted PSCs.展开更多
Perovskite solar cells(PSCs)are undergoing rapid development and the power conversion efficiency reaches 25.7%which attracts increasing attention on their commercialization recently.In this review,we summarized the re...Perovskite solar cells(PSCs)are undergoing rapid development and the power conversion efficiency reaches 25.7%which attracts increasing attention on their commercialization recently.In this review,we summarized the recent progress of PSCs based on device structures,perovskite-based tandem cells,large-area modules,stability,applications and industrialization.Last,the challenges and perspectives are discussed,aiming at providing a thrust for the commercialization of PSCs in the near future.展开更多
基金supported by the National Natural Science Foundation of China(Nos.52125206,52433013,52273050,and 22409008)the Beijing Natural Science Foundation(No.Z240024)+3 种基金the National Key Research and Development Program of China(No.2023YFB4202502)the China Postdoctoral Science Foundation(No.2024T170023)the Qing Lan Project,the Tencent Foundation through the Xplorer Prize,the China National Petroleum Corporation-Peking University Strategic Cooperation Project of Fundamental Research,the Sinopec Seeding Programthe Yunnan Provincial Science and Technology Project at Southwest United Graduate School(No.202302AO370013).
文摘Metal halide perovskite solar cells(PSCs)are anticipated to play a pivotal role in the next generation of photovoltaic technologies,but their unsatisfactory stability hinders further commercial applications.Particularly,numerous interfacial defects and poor mechanical adhesion at the perovskite buried interface present a critical obstacle hindering power conversion efficiency(PCE)and longterm stability of PSCs.Here,different from conventional small-molecule or linear polymer interface modifiers,we introduce a star-shaped PMMA-b-PDMAEMA(S-MD,where PMMA=poly(methyl methacrylate)and PDMAEMA=poly(dimethylaminoethyl methacrylate))polymer as a multifunctional bridge-linking polymer for simultaneous defect passivation and mechanical reinforcement at the buried interface of inverted(p-i-n)PSCs.S-MD features a three-dimensional architecture with multiple extended conjugated arms,offering multiple Lewis base functional groups(e.g.,C=O and R-N(CH_(3))_(2))with a high density of multidentate coordination sites.These groups can effectively coordinate with electron-deficient defects at the perovskite buried interface,enabling improved crystallization,reduced defect density,and enhanced interfacial adhesion.As a result,the interfacial fracture strength increases from 0.13 to 1.66 MPa.The resultant device achieves a PCE of 26.35%(certified steady-state PCE of 25.96%).The flexible device retains over 90%of its initial efficiency after 3000 flexing cycles at a curvature radius of 6 mm(R=6 mm).This work highlights a multidentate coordinating,star-shaped polymer interface strategy that offers a promising pathway toward highly efficient and stable inverted PSCs.
文摘Perovskite solar cells(PSCs)are undergoing rapid development and the power conversion efficiency reaches 25.7%which attracts increasing attention on their commercialization recently.In this review,we summarized the recent progress of PSCs based on device structures,perovskite-based tandem cells,large-area modules,stability,applications and industrialization.Last,the challenges and perspectives are discussed,aiming at providing a thrust for the commercialization of PSCs in the near future.
