Nanoscale phase management of the 2D/3D heterostructure toward efficient perovskite solar cells  

二维/三维异质结构的纳米级相管理以实现高效的钙钛矿太阳能电池

作　　者：Hao Gu Annan Zhu Junmin Xia Wang Li Jiahao Zheng Tao Yang Shengwen Li Nan Zhang Shiliang Mei Yongqing Cai Shi Chen Chao Liang Guichuan Xing 顾浩;朱桉楠;夏俊民;李旺;郑嘉豪;杨涛;李胜文;张楠;梅时良;蔡永青;陈石;梁超;邢贵川

机构地区：[1]Joint Key Laboratory of the Ministry of Education,Institute of Applied Physics and Materials Engineering,University of Macao,Macao 999078,China [2]State Key Laboratory of Organic Electronics and Information Displays&Institute of Advanced Materials(IAM),Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM),Nanjing University of Posts&Telecommunications(NUPT),Nanjing 210023,China [3]MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter,School of Physics,National Innovation Platform(Center)for Industry-Education Integration of Energy Storage Technology,Xi’an Jiaotong University,Xi’an 710049,China [4]Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System,Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic Systems,Harbin Institute of Technology,Shenzhen 518055,China [5]Institute for Electric Light Sources,School of Information Science and Technology,Fudan University,Shanghai 200433,China

出　　处：《Science Bulletin》2024年第18期2853-2861,共9页科学通报（英文版）

基　　金：the Science and Technology Development Fund,Macao SAR(FDCT-0082/2021/A2,0010/2022/AMJ,0060/2023/RIA1,0136/2022/A3,006/2022/ALC,and EF044/IAPME-HG/2022/MUST);UM’s research fund(MYRG2022-00241IAPME,MYRG-GRG2023-00065-IAPME-UMDF,and MYRGCRG2022-00009-FHS);the research fund from Wuyi University(EF38/IAPME-XGC/2022/WYU);Shaanxi Fundamental Science Research Project for Mathematics and Physics(22JSY015 and 23JSY005);Shaanxi Province science and technology activities for overseas students selected funding project(2023015);the State Key Laboratory for Strength and Vibration of Mechanical Structures(SV2023-KF-18);Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic Systems(2023B1212010003);the China Fundamental Research Funds for the Central Universities,Young Talent Fund of Xi’an Association for Science and Technology(959202313020);the project of Innovative Team of Shaanxi Province(2020TD-001);the Natural Science Research Start-up Foundation of Recruiting Talents of Nanjing University of Posts and Telecommunications(NY223053);the National Natural Science Foundation of China(61935017,62105292,62175268,62288102 and 62304111)。

摘　　要：The stabilization of the formamidinium lead iodide(FAPbI_(3))structure is pivotal for the development of efficient photovoltaic devices.Employing two-dimensional(2D)layers to passivate the threedimensional(3D)perovskite is essential for maintaining the a-phase of FAPbI_(3) and enhancing the power conversion efficiency(PCE)of perovskite solar cells(PSCs).However,the role of bulky ligands in the phase management of 2D perovskites,crucial for the stabilization of FAPbI_(3),has not yet been elucidated.In this study,we synthesized nanoscale 2D perovskite capping crusts with<n>=1 and 2 Ruddlesden-Popper(RP)perovskite layers,respectively,which form a type-Ⅱ 2D/3D heterostructure.This heterostructure stabilizes the a-phase of FAPbI_(3),and facilitates ultrafast carrier extraction from the 3D perovskite network to transport contact layer.We introduced tri-fluorinated ligands to mitigate defects caused by the halide vacancies and uncoordinated Pb^(2+)ions,thereby reducing nonradiative carrier recombination and extending carrier lifetime.The films produced were incorporated into PSCs that not only achieved a PCE of 25.39%but also maintained 95%of their initial efficiency after 2000 h of continuous light exposure without encapsulation.These findings underscore the effectiveness of a phase-pure 2D/3D heterostructure-terminated film in inhibiting phase transitions passivating the iodide anion vacancy defects,facilitating the charge carrier extraction,and boosting the performance of optoelectronic devices.

关 键 词：Phase-pure 2D perovskite 2D/3D heterostructure Type-II energy alignment Carrier dynamic FAPbI_(3) 

分 类 号：TM914.4[电气工程—电力电子与电力传动] TB383.1[一般工业技术—材料科学与工程]