Dion–Jacobson-Phase 2D Sn-Based Perovskite Comprising a High Dipole Moment of π-Conjugated Short-Chain Organic Spacers for High-Performance Solar Cell Applications

Jie Qian; Yawen Li; Yifan Shen; Xiangqing Zhao; Chong Wu; Hao Gu; Zhipeng Zhang; Yanfeng Chen; Bo Cai; Junmin Xia; Wei Shen; Kun Cao; Lihui Liu; Lijun Zhang; Gang Cheng; Shufen Chen; Guichuan Xing; Wei Huang

doi:10.1021/acsnano.4c02076

journal article·2024-06-11

Dion–Jacobson-Phase 2D Sn-Based Perovskite Comprising a High Dipole Moment of π-Conjugated Short-Chain Organic Spacers for High-Performance Solar Cell Applications

Jie Qian, Yawen Li, Yifan Shen, Xiangqing Zhao, Chong Wu, Hao Gu, Zhipeng Zhang, Yanfeng Chen, Bo Cai, Junmin Xia, Wei Shen, Kun Cao, Lihui Liu, Lijun Zhang, Gang Cheng, Shufen Chen, Guichuan Xing, Wei Huang

ACS Nano· Volume 18· Issue 23

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Source abstract

Abstract

The stability issue of Sn-based perovskite solar cells (PSCs) is expected to be resolved by involving a two-dimensional (2D) layered structure. However, Sn-based 2D PSCs, especially Dion–Jacobson (DJ)-phase ones with potentially good stability, have rarely been reported. Herein, superior DJ-phase Sn 2D perovskites with 3-aminobenzylamine (3ABA 2+ ) or 4-aminobenzylamine (4ABA 2+ ) π-conjugated short-chain ligands are reported to fabricate efficient 2D lead-free PSCs. Notably, the high dipole moment of the 3ABAI 2 organic spacer is approved to possess faster charge transfer for forming (3ABA)FA 4 Sn 5 I 16 2D perovskite with an extremely low exciton binding energy (only 84 meV). In combination with a diacetate partial substitution and methylamine iodide/bromide (MAI/MABr) post-treatment strategy to delay crystallization and improve compactness and coverage of the perovskite film, a record power conversion efficiency (PCE) of 6.81% and stability of 840 h (less than 5% degradation in a N 2 atmosphere for unencapsulated devices) are acquired in eventual (3ABA)FA 4 Sn 5 I 16 2D PSCs, which are among the highest PCE and the longest stability of Sn-based 2D PSCs reported to date. Our work provides a prospective molecule design and film preparation strategy of 2D Sn perovskites toward nontoxic high-performance tin-based PSCs, which pushes the almost stagnant research forward.

Source: openalex_inverted_index · Quality: baseline

Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Organic Electronics and Photovoltaics

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

Affiliations

State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China

State Key Laboratory of Integrated Optoelectronics, Key Laboratory of Automobile Materials of MOE, International Center of Computational Method and Software and College of Materials Science and Engineering, Jilin University, Changchun 130012, China

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

State Key Laboratory of Synthetic Chemistry, HKU-CAS Joint Laboratory on New Materials, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, SAR 999077, China

Frontiers Science Center for Flexible Electronics (FSCFE), MIIT Key Laboratory of Flexible Electronics (KLoFE), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi’an 710072, China

Funding

Universidade de Macau · Natural Science Foundation of Jiangsu Province · Science, Technology and Innovation Commission of Shenzhen Municipality · Fundo para o Desenvolvimento das Ci?ncias e da Tecnologia · National Natural Science Foundation of China · Priority Academic Program Development of Jiangsu Higher Education Institutions · Science Foundation of Nanjing University of Posts & Telecommunications · Postgraduate Research & Practice Innovation Program of Jiangsu Province · Natural Science Fund for Colleges and Universities in Jiangsu Province

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