DataVXACS Applied Energy MaterialsPaper
journal article·2020-06-22

Improved Crystallization and Stability of Mixed-Cation Tin Iodide for Lead-Free Perovskite Solar Cells

Xin Xu, Kun Cao, Wenjing Zhu, Wenwen Gu, Ben Ma, Minchao Qin, Jie Qian, Yao Lu, Ziwei Liu, Shufen Chen, Xinhui Lu, Wei Huang

ACS Applied Energy Materials· Volume 3· Issue 6
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Source abstract

Abstract

Formamidinium tin iodide (FASnI3) perovskite is a promising light harvester for lead-free perovskite solar cells (PSCs). However, the poor quality of the solution-processed FASnI3 film always leads to an inferior efficiency and poor stability. Herein, we demonstrate a mixed-cation strategy by trace-doping of highly hydrophobic cations to construct high-quality three-dimensional (3D) perovskite films. Tin halide perovskites with FA and 3,3-diphenylpropylammonium (DPPA) hybrid cations were fabricated, and the trace-doping of DPPA cations can greatly enhance the stability of 3D perovskites by suppressing the oxidation of Sn2+ to Sn4+. After optimization of DPPAI/FAI ratios, the DPPA0.02FA0.98SnI3 perovskite achieves better film crystallinity and morphology. Our champion device based on DPPA0.02FA0.98SnI3 perovskite shows the highest power conversion efficiency of 6.75% with all improved device parameters. Moreover, the corresponding unencapsulated device retains 70% of its initial efficiency after aging over 600 h in N2 environment. This work provides a feasible approach to fabricate high-quality 3D perovskites for lead-free PSCs applications.
Source: openalex_inverted_index · Quality: baseline

Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Quantum Dots Synthesis And Properties

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

Affiliations

Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China

Department of Physics, Chinese University of Hong Kong, New Territories 999077, Hong Kong

Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi’an 710072, Shaanxi, China

Funding

Research Grants Council, University Grants Committee · Ministry of Science and Technology of the People's Republic of China · Natural Science Foundation of Jiangsu Province · Government of Jiangsu Province · Jilin University · Ministry of Human Resources and Social Security · National Natural Science Foundation of China · Chinese University of Hong Kong · Priority Academic Program Development of Jiangsu Higher Education Institutions · Synergetic Innovation Center for Organic Electronics and Information Displays · National Major Fundamental Research Program of China

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