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

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

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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.

Phase-pure 2D perovskite2D/3D heterostructureType-Ⅱ energy alignmentCarrier dynamicFAPbI3

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

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Joint Key Laboratory of the Ministry of Education,Institute of Applied Physics and Materials Engineering,University of Macau,Macao 999078,China

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

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

Institute for Electric Light Sources,School of Information Science and Technology,Fudan University,Shanghai 200433,China

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Science and Technology Development Fund,Macao SARScience and Technology Development Fund,Macao SARScience and Technology Development Fund,Macao SARScience and Technology Development Fund,Macao SARScience and Technology Development Fund,Macao SARScience and Technology Development Fund,Macao SARUM's research fundUM's research fundUM's research fundresearch fund from Wuyi UniversityShaanxi Fundamental Science Research Project for Mathematics and PhysicsShaanxi Fundamental Science Research Project for Mathematics and PhysicsShaanxi Province science and technology activities for overseas students selected funding projectState Key Laboratory for Strength and Vibration of Mechanical StructuresGuangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic SystemsChina Fundamental Research Funds for the Central UniversitiesYoung Talent Fund of Xi'an Association for Science and Technologyproject of Innovative Team of Shaanxi ProvinceNatural Science Research Startup Foundation of Recruiting Talents of Nanjing University of Posts and TelecommunicationsNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaHigh-Performance Computing Cluster(HPCC)Information and Communication Technology Office of the University of Macau

FDCT-0082/2021/A20010/2022/AMJ0060/2023/RIA10136/2022/A3006/2022/ALCEF044/IAPME-HG/2022/MUSTMYRG2022-00241-IAPMEMYRG-GRG2023-00065-IAPME-UMDFMYRG-CRG2022-00009-FHSEF38/IAPME-XGC/2022/WYU22JSY01523JSY0052023015SV2023-KF-182023B12120100039592023130202020TD-001NY22305361935017621052926217526862288102623041111CTO

2024

10.1016/j.scib.2024.07.026

科学通报(英文版)
中国科学院

科学通报(英文版)

CSTPCD
ISSN：1001-6538
年,卷(期)：2024.69(18)