Textured Perovskite/Silicon Tandem Solar Cells Achieving Over 30% Efficiency Promoted by 4-Fluorobenzylamine Hydroiodide  

作　　者：Jingjing Liu Biao Shi Qiaojing Xu Yucheng Li Yuxiang Li Pengfei Liu Zetong SunLi Xuejiao Wang Cong Sun Wei Han Diannan Li Sanlong Wang Dekun Zhang Guangwu Li Xiaona Du Ying Zhao Xiaodan Zhang 

机构地区：[1]Renewable Energy Conversion and Storage Center,Solar Energy Conversion Center,Institute of Photoelectronic Thin Film Devices and Technology,Nankai University,Tianjin 300350,People’s Republic of China [2]Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin,Tianjin 300350,People’s Republic of China [3]Haihe Laboratory of Sustainable Chemical Transformations,Tianjin 300192,People’s Republic of China [4]Engineering Research Center of Thin Film Photoelectronic Technology of Ministry of Education,Tianjin 300350,People’s Republic of China [5]Collaborative Innovation Center of Chemical Science and Engineering(Tianjin),Tianjin 300072,People’s Republic of China [6]Center of Single‑Molecule Sciences,Institute of Modern Optics,Tianjin Key Laboratory of Micro‑Scale Optical Information Science and Technology,College of Electronic Information and Optical Engineering,Nankai University,38 Tongyan Road,Jinnan District,Tianjin 300350,People’s Republic of China [7]Shenzhen Research Institute of Nankai University,16Th Floor,Yantian Science and Technology Building,Haishan Street,Yantian District,Shenzhen 518083,People’s Republic of China

出　　处：《Nano-Micro Letters》2024年第9期557-570,共14页纳微快报（英文版）

基　　金：the financial support of National Key Research and Development Program of China(Grant No.2023YFB4202503);the Joint Funds of the National Natural Science Foundation of China(Grant No.U21A2072);Natural Science Foundation of China(Grant No.62274099);Natural Science Foundation of Tianjin(No.20JCQNJC02070);China Postdoctoral Science Foundation(No.2020T130317);the Overseas Expertise Introduction Project for Discipline Innovation of Higher Education of China(Grant No.B16027);Tianjin Science and Technology Project(Grant No.18ZXJMTG00220);Key R&D Program of Hebei Province(No.19214301D);provided by the Haihe Laboratory of Sustainable Chemical Transformations;the Fundamental Research Funds for the Central Universities,Nankai University.

摘　　要：Monolithic textured perovskite/silicon tandem solar cells(TSCs)are expected to achieve maximum light capture at the lowest cost,potentially exhibiting the best power conversion efficiency.However,it is challenging to fabricate high-quality perovskite films and preferred crystal orientation on commercially textured silicon substrates with micrometersize pyramids.Here,we introduced a bulky organic molecule(4-fluorobenzylamine hydroiodide(F-PMAI))as a perovskite additive.It is found that F-PMAI can retard the crystallization process of perovskite film through hydrogen bond interaction between F^(−)and FA^(+)and reduce(111)facet surface energy due to enhanced adsorption energy of F-PMAI on the(111)facet.Besides,the bulky molecular is extruded to the bottom and top of perovskite film after crystal growth,which can passivate interface defects through strong interaction between F-PMA+and undercoordinated Pb^(2+)/I^(−).As a result,the additive facilitates the formation of large perovskite grains and(111)preferred orientation with a reduced trap-state density,thereby promoting charge carrier transportation,and enhancing device performance and stability.The perovskite/silicon TSCs achieved a champion efficiency of 30.05%based on a silicon thin film tunneling junction.In addition,the devices exhibit excellent longterm thermal and light stability without encapsulation.This work provides an effective strategy for achieving efficient and stable TSCs.

关 键 词：Perovskite crystallization (111)preferred orientation Defect passivation Perovskite/silicon tandem solar cells 

分 类 号：TM914.4[电气工程—电力电子与电力传动]