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

Hao Gu ¹Annan Zhu ¹Junmin Xia ²Wang Li ¹Jiahao Zheng ¹Tao Yang ³Shengwen Li ¹Nan Zhang ⁴Shiliang Mei ⁵Yongqing Cai ¹Shi Chen ¹Chao Liang ⁴Guichuan Xing¹

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作者信息

1. Joint Key Laboratory of the Ministry of Education,Institute of Applied Physics and Materials Engineering,University of Macau,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. 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;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,Chin
5. Institute for Electric Light Sources,School of Information Science and Technology,Fudan University,Shanghai 200433,China
折叠

Abstract

The stabilization of the formamidinium lead iodide(FAPbI3)structure is pivotal for the development of efficient photovoltaic devices.Employing two-dimensional(2D)layers to passivate the three-dimensional(3D)perovskite is essential for maintaining the α-phase of FAPbI3 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 FAPbI3,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-Ⅱ2D/3D heterostructure.This heterostruc-ture stabilizes the α-phase of FAPbI3,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 Pb2+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 expo-sure 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.

Key words

Phase-pure 2D perovskite/2D/3D heterostructure/Type-Ⅱ energy alignment/Carrier dynamic/FAPbI3

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基金项目

Science and Technology Development Fund,Macao SAR(FDCT-0082/2021/A2)

Science and Technology Development Fund,Macao SAR(0010/2022/AMJ)

Science and Technology Development Fund,Macao SAR(0060/2023/RIA1)

Science and Technology Development Fund,Macao SAR(0136/2022/A3)

Science and Technology Development Fund,Macao SAR(006/2022/ALC)

Science and Technology Development Fund,Macao SAR(EF044/IAPME-HG/2022/MUST)

UM's research fund(MYRG2022-00241-IAPME)

UM's research fund(MYRG-GRG2023-00065-IAPME-UMDF)

UM's research fund(MYRG-CRG2022-00009-FHS)

research fund from Wuyi University(EF38/IAPME-XGC/2022/WYU)

Shaanxi Fundamental Science Research Project for Mathematics and Physics(22JSY015)

Shaanxi Fundamental Science Research Project for Mathematics and Physics(23JSY005)

Shaanxi Province science and technology activities for overseas students selected funding project(2023015)

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)

China Fundamental Research Funds for the Central Universities()

Young Talent Fund of Xi'an Association for Science and Technology(959202313020)

project of Innovative Team of Shaanxi Province(2020TD-001)

Natural Science Research Startup Foundation of Recruiting Talents of Nanjing University of Posts and Telecommunications(NY223053)

National Natural Science Foundation of China(61935017)

National Natural Science Foundation of China(62105292)

National Natural Science Foundation of China(62175268)

National Natural Science Foundation of China(62288102)

National Natural Science Foundation of China(62304111)

High-Performance Computing Cluster(HPCC)()

Information and Communication Technology Office of the University of Macau(1CTO)

出版年

2024

科学通报(英文版)

中国科学院

科学通报(英文版)

CSTPCD

ISSN：1001-6538

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