journal article·2019-08-09Open access

Ligand-Size Related Dimensionality Control in Metal Halide Perovskites

Peirui Cheng, Peijun Wang, Zhuo Xu, Xuguang Jia, Qilin Wei, Ningyi Yuan, Jianning Ding, Ruipeng Li, Guangtao Zhao, Yingchun Cheng, Kui Zhao, Shengzhong Frank Liu

ACS Energy Letters· Volume 4· Issue 8

Abstract

Low-dimensional organic–inorganic hybrid perovskites have triggered many fundamental research studies due to their intrinsic tunable photovoltaic properties, technologically relevant stability, and promising efficiency. However, there is limited information on how ligand size influences inherent structural and electronic properties of perovskites. To gain deeper understanding of ligand-size related structural and film properties, we fabricated a series of (L)2(MA)n-1PbnI3n+1 materials by introducing organic spacer ligands of n-CH3CH2NH3 (EA), n-CH3(CH2)2NH3 (PA), and n-CH3(CH2)3NH3 (BA) into the three-dimensional (3D) methylammonium (MA) lead iodide (MAPbI3) system with the same inorganic layer thickness (average ⟨n⟩ = 4). We demonstrate that the increased number of carbon atoms on ligands affects compatibility of ligands with the 3D [PbI6]4– framework, leading to different structural dimensionality and crystal orientation, largely explaining different electronic properties, crystal stability, and the consequent device performance of solar cells. This work provides key missing information on how ligand size influences structural dimensionality and desirable electronic properties for future stable and efficient solar cells.
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Research context

OpenAlex topics: Perovskite Materials and Applications · Advanced Photocatalysis Techniques · Quantum Dots Synthesis And Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, P. R. China

Dalian National Laboratory for Clean Energy, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, P. R. China

School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Jiangsu Province Cultivation Base for State Key Laboratory of Photovoltaic Science and Technology, Changzhou University, Changzhou 213164, P. R. China

Key Laboratory of Flexible Electronics and Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, P. R. China

NSLS II, Brookhaven National Lab, Upton New York 11973, United States

Funding

State Administration of Foreign Experts Affairs · Ministry of Science and Technology of the People's Republic of China · Ministry of Education of the People's Republic of China · Brookhaven National Laboratory · National Natural Science Foundation of China · National University Research fund · National 1000-talent-plan program

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