Top-Down Dual-Interface Carrier Management for Highly Efficient and Stable Perovskite/Silicon Tandem Solar Cells  

作　　者：Xin Li Zhiqin Ying Shuo Li Lei Chen Meili Zhang Linhui Liu Xuchao Guo Jun Wu Yihan Sun Chuanxiao Xiao Yuheng Zeng Jian Wu Xi Yang Jichun Ye 

机构地区：[1]Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,People’s Republic of China [2]University of Chinese Academy of Sciences,No.19(A)Yuquan Road,Shijingshan District,Beijing 100049,People’s Republic of China [3]CSI Solar Technologies(JiaXing)Co.,Ltd,No.325 Kanghe Road,Gaozhao Street,Xiuzhou Jiaxing,Zhejiang 314001,People’s Republic of China

出　　处：《Nano-Micro Letters》2025年第6期349-368,共20页纳微快报(英文版)

基　　金：supported by the National Natural Science Foundation of China(Grant No.62204245,U23A200098);Baima Lake Laboratory Joint Funds of the Zhejiang Provincial Natural Science Foundation of China(Grant No.LBMHD24E020002);Key Research and Development Program of Zhejiang Province(Grant No.2022C01215,2024C01092);China Postdoctoral Science Foundation(Grant No.2023M743620,2024T170960);Key Research and Development Program of Ningbo(Grant No.2023Z151);National Key Research and Development Program of China(Grant No.2024YFB3817304);Zhejiang Provincial Natural Science Foundation of China(Grant No.LY24F040003).

摘　　要：Despite significant advancements in the power conversion efficiency(PCE)of perovskite/silicon tandem solar cells,improving carrier management in top cells remains challenging due to the defective dual interfaces of wide-bandgap perovskite,particularly on textured silicon surfaces.Herein,a series of halide ions(Cl^(-),Br^(-),I^(-))substituted piperazinium salts are designed and synthesized as post-treatment modifiers for perovskite surfaces.Notably,piperazinium chloride induces an asymmetric bidirectional ions distribution from the top to the bottom surface,with large piperazinium cations concentrating at the perovskite surface and small chloride anions migrating downward to accumulate at the buried interface.This results in effective dual-interface defect passivation and energy band modulation,enabling wide-bandgap(1.68 eV)perovskite solar cells to achieve a PCE of 22.3%and a record product of open-circuit voltage×fill factor(84.4%relative to the Shockley-Queisser limit).Furthermore,the device retains 91.3%of its initial efficiency after 1200 h of maximum power point tracking without encapsulation.When integrated with double-textured silicon heterojunction solar cells,a remarkable PCE of 31.5%is achieved for a 1.04 cm^(2) monolithic perovskite/silicon tandem solar cell,exhibiting excellent long-term operational stability(T_(80)=755 h)without encapsulation in ambient air.This work provides a convenient strategy on dual-interface engineering for making high-efficiency and stable perovskite platforms.

关 键 词：Perovskite/silicon tandem solar cells Carrier management Dual-interface POST-TREATMENT 

分 类 号：O62[理学—有机化学]