Piperazine-Assisted Construction of 2D/3D Wide-Bandgap Perovskite for Realizing High-Efficiency Perovskite/Organic Tandem Solar Cells  

作　　者：Ziyue Wang Shuaiqing Kang Xia Zhou Haiyang Chen Xingxing Jiang Zhichao Zhang Jialei Zheng Ruopeng Zhang Weijie Chen Jiandong Zhang Yaowen Li 

机构地区：[1]Laboratory of Advanced Optoelectronic Materials,Suzhou Key Laboratory of Novel Semiconductor-optoelectronics Materials and Devices,College of Chemistry,Chemical Engineering and Materials Science,Soochow University,Suzhou,Jiangsu 215123,China [2]Jiangsu Key Laboratory of Advanced Negative Carbon Technologies,Soochow University,Suzhou,Jiangsu 215123,China [3]State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials,Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application,College of Chemistry,Chemical Engineering and Materials Science,Soochow University,Suzhou,Jiangsu 215123,China [4]College of Physics and Electronics Engineering,Hengyang Normal University,Hengyang,Hunan 421002,China

出　　处：《Chinese Journal of Chemistry》2024年第16期1819-1827,共9页中国化学（英文版）

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.52325307,52203233,22075194,and 52273188);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,Undergraduate Training Programfor Innovation and Entrepreneurship,Soochow University(No.202310285036Z).

摘　　要：Monolithic perovskite/organic tandem solar cells(TsCs)have gained significant attention due to their easy device integration and the potential to surpass the Shockley-Queisser limit of single-junction solar cells.However,the surfaces of wide-bandgap perovskite films are densely populated with defects,leading to severe non-radiative recombination and energy loss.As a consequence,the power conversion efficiency(PCE)of perovskite/organic TSCs lags behind that of other TSC counterparts.To address these issues,we designed a functional ammonium salt,4-(2-hydroxyethyl)piperazin-1-ium iodide(Pzol),comprising a piperazine iodide and a terminated hydroxyl group,which was applied for post-treating the perovskite surface.Our findings reveal that Pzol reacts with and consumes residual PbX_(2)(X:I or Br)to form a 2D perovskite component,thereby eliminating Pb^(0)defects,while the terminated hydroxyl group in PZOI can also passivate uncoordinated Pb^(2+).Consequently,the shallow/deep-level defect densities of the 2D/3D perovskite film were significantly reduced,leading to an enhanced PCE of single-junction 2D/3D wide-bandgap perovskite solar cells to 18.18% with a reduced energy loss of 40 mev.Importantly,the corresponding perovskite/organic TSCs achieved a remarkable PCE of 24.05% with enhanced operational stability(T_(90)~500h).

关 键 词：Perovskite/organic tandem solar cell Defect states Piperazine ion salt Energy conversion Low-dimensional materials Perovskitesolar cells 2D/3D perovskites Efficiency 

分 类 号：TM914.4[电气工程—电力电子与电力传动]