Issue

Vol. 15 (2023)

Ligand Engineering in Tin-Based Perovskite Solar Cells

https://doi.org/10.1007/s40820-023-01143-0
Peizhou Li
Key Laboratory for Physical Electronics and Devices (MoE), Shaanxi Key Lab of Information Photonic Technique, School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
Xiangrong Cao
Key Laboratory for Physical Electronics and Devices (MoE), Shaanxi Key Lab of Information Photonic Technique, School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
Jingrui Li
Key Laboratory for Physical Electronics and Devices (MoE), Shaanxi Key Lab of Information Photonic Technique, School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
Bo Jiao
Key Laboratory for Physical Electronics and Devices (MoE), Shaanxi Key Lab of Information Photonic Technique, School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
Xun Hou
Key Laboratory for Physical Electronics and Devices (MoE), Shaanxi Key Lab of Information Photonic Technique, School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
Feng Hao
School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, People’s Republic of China
Zhijun Ning
School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, People’s Republic of China
Zuqiang Bian
Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People’s Republic of China
Jun Xi
Key Laboratory for Physical Electronics and Devices (MoE), Shaanxi Key Lab of Information Photonic Technique, School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
Liming Ding
Center for Excellence in Nanoscience (CAS), Key Laboratory of Nanosystem and Hierarchical Fabrication (CAS), National Center for Nanoscience and Technology, Beijing 100190, People’s Republic of China
Zhaoxin Wu
Key Laboratory for Physical Electronics and Devices (MoE), Shaanxi Key Lab of Information Photonic Technique, School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
Hua Dong
Key Laboratory for Physical Electronics and Devices (MoE), Shaanxi Key Lab of Information Photonic Technique, School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China

Corresponding Author: Hua Dong

donghuaxjtu@xjtu.edu.cn

Nano-Micro Letters, Vol. 15 (2023), Article Number: 167

Abstract

Perovskite solar cells (PSCs) have attracted aggressive attention in the photovoltaic field in light of the rapid increasing power conversion efficiency. However, their large-scale application and commercialization are limited by the toxicity issue of lead (Pb). Among all the lead-free perovskites, tin (Sn)-based perovskites have shown potential due to their low toxicity, ideal bandgap structure, high carrier mobility, and long hot carrier lifetime. Great progress of Sn-based PSCs has been realized in recent years, and the certified efficiency has now reached over 14%. Nevertheless, this record still falls far behind the theoretical calculations. This is likely due to the uncontrolled nucleation states and pronounced Sn (IV) vacancies. With insights into the methodologies resolving both issues, ligand engineering-assisted perovskite film fabrication dictates the state-of-the-art Sn-based PSCs. Herein, we summarize the role of ligand engineering during each state of film fabrication, ranging from the starting precursors to the ending fabricated bulks. The incorporation of ligands to suppress Sn2+ oxidation, passivate bulk defects, optimize crystal orientation, and improve stability is discussed, respectively. Finally, the remained challenges and perspectives toward advancing the performance of Sn-based PSCs are presented. We expect this review can draw a clear roadmap to facilitate Sn-based PSCs via ligand engineering.


Highlights:


1 Systematic summary of ligand engineering in Sn-based perovskite solar cells at the molecular level (oxidation-suppression), crystal structural level (bulk-defect passivation and crystal orientation optimization), and film level (film stability).
2 The classification and composition of ligand engineering in the review are the same as the actual preparation process, which will help researchers to understand the role of ligands in combination with the actual experiment process.
3 Description of ligands focuses on the function of each functional group; the relevant conclusion can be universal.

Keywords

Perovskite Solar cells Lead-free Ligand engineering Defects Stability
Li, Peizhou, Xiangrong Cao, Jingrui Li, Bo Jiao, Xun Hou, Feng Hao, Zhijun Ning, Zuqiang Bian, Jun Xi, Liming Ding, Zhaoxin Wu, and Hua Dong. 2023. “Ligand Engineering in Tin-Based Perovskite Solar Cells”. Nano-Micro Letters 15 (July):167. https://doi.org/10.1007/s40820-023-01143-0.
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