Issue

Vol. 16 (2024)

Textured Perovskite/Silicon Tandem Solar Cells Achieving Over 30% Efficiency Promoted by 4-Fluorobenzylamine Hydroiodide

https://doi.org/10.1007/s40820-024-01406-4
Jingjing Liu
Renewable Energy Conversion and Storage Center, Solar Energy Conversion Center, Institute of Photoelectronic Thin Film Devices and Technology, Nankai University, Tianjin 300350, People’s Republic of China
Biao Shi
Renewable Energy Conversion and Storage Center, Solar Energy Conversion Center, Institute of Photoelectronic Thin Film Devices and Technology, Nankai University, Tianjin 300350, People’s Republic of China
Qiaojing Xu
Renewable Energy Conversion and Storage Center, Solar Energy Conversion Center, Institute of Photoelectronic Thin Film Devices and Technology, Nankai University, Tianjin 300350, People’s Republic of China
Yucheng Li
Renewable Energy Conversion and Storage Center, Solar Energy Conversion Center, Institute of Photoelectronic Thin Film Devices and Technology, Nankai University, Tianjin 300350, People’s Republic of China
Yuxiang Li
Renewable Energy Conversion and Storage Center, Solar Energy Conversion Center, Institute of Photoelectronic Thin Film Devices and Technology, Nankai University, Tianjin 300350, People’s Republic of China
Pengfei Liu
Renewable Energy Conversion and Storage Center, Solar Energy Conversion Center, Institute of Photoelectronic Thin Film Devices and Technology, Nankai University, Tianjin 300350, People’s Republic of China
Zetong SunLi
Renewable Energy Conversion and Storage Center, Solar Energy Conversion Center, Institute of Photoelectronic Thin Film Devices and Technology, Nankai University, Tianjin 300350, People’s Republic of China
Xuejiao Wang
Renewable Energy Conversion and Storage Center, Solar Energy Conversion Center, Institute of Photoelectronic Thin Film Devices and Technology, Nankai University, Tianjin 300350, People’s Republic of China
Cong Sun
Renewable Energy Conversion and Storage Center, Solar Energy Conversion Center, Institute of Photoelectronic Thin Film Devices and Technology, Nankai University, Tianjin 300350, People’s Republic of China
Wei Han
Renewable Energy Conversion and Storage Center, Solar Energy Conversion Center, Institute of Photoelectronic Thin Film Devices and Technology, Nankai University, Tianjin 300350, People’s Republic of China
Diannan Li
Renewable Energy Conversion and Storage Center, Solar Energy Conversion Center, Institute of Photoelectronic Thin Film Devices and Technology, Nankai University, Tianjin 300350, People’s Republic of China
Sanlong Wang
Renewable Energy Conversion and Storage Center, Solar Energy Conversion Center, Institute of Photoelectronic Thin Film Devices and Technology, Nankai University, Tianjin 300350, People’s Republic of China
Dekun Zhang
Renewable Energy Conversion and Storage Center, Solar Energy Conversion Center, Institute of Photoelectronic Thin Film Devices and Technology, Nankai University, Tianjin 300350, People’s Republic of China
Guangwu Li
Center of Single‑Molecule Sciences, Institute of Modern Optics, Tianjin Key Laboratory of Micro‑Scale Optical Information Science and Technology, College of Electronic Information and Optical Engineering, Nankai University, 38 Tongyan Road, Jinnan District, Tianjin 300350, People’s Republic of China
Xiaona Du
Renewable Energy Conversion and Storage Center, Solar Energy Conversion Center, Institute of Photoelectronic Thin Film Devices and Technology, Nankai University, Tianjin 300350, People’s Republic of China
Ying Zhao
Renewable Energy Conversion and Storage Center, Solar Energy Conversion Center, Institute of Photoelectronic Thin Film Devices and Technology, Nankai University, Tianjin 300350, People’s Republic of China
Xiaodan Zhang
Renewable Energy Conversion and Storage Center, Solar Energy Conversion Center, Institute of Photoelectronic Thin Film Devices and Technology, Nankai University, Tianjin 300350, People’s Republic of China

Corresponding Author: Xiaodan Zhang

xdzhang@nankai.edu.cn

Nano-Micro Letters, Vol. 16 (2024), Article Number: 189

Abstract

Monolithic textured perovskite/silicon tandem solar cells (TSCs) are expected to achieve maximum light capture at the lowest cost, potentially exhibiting the best power conversion efficiency. However, it is challenging to fabricate high-quality perovskite films and preferred crystal orientation on commercially textured silicon substrates with micrometer-size pyramids. Here, we introduced a bulky organic molecule (4-fluorobenzylamine hydroiodide (F-PMAI)) as a perovskite additive. It is found that F-PMAI can retard the crystallization process of perovskite film through hydrogen bond interaction between F− and FA+ and reduce (111) facet surface energy due to enhanced adsorption energy of F-PMAI on the (111) facet. Besides, the bulky molecular is extruded to the bottom and top of perovskite film after crystal growth, which can passivate interface defects through strong interaction between F-PMA+ and undercoordinated Pb2+/I−. As a result, the additive facilitates the formation of large perovskite grains and (111) preferred orientation with a reduced trap-state density, thereby promoting charge carrier transportation, and enhancing device performance and stability. The perovskite/silicon TSCs achieved a champion efficiency of 30.05% based on a silicon thin film tunneling junction. In addition, the devices exhibit excellent long-term thermal and light stability without encapsulation. This work provides an effective strategy for achieving efficient and stable TSCs.


Highlights:
1 Evaporation and solution two-step hybrid process are used to fabricate conformal growth of perovskite film on textured silicon substrates.
2 F-PMAI additive enlarged the perovskite grains, induced the (111) preferred orientation and passivated interface defects.
3 We obtained a champion efficiency of 30.05% for a monolithic perovskite/silicon tandem solar cell based on a silicon thin film tunneling junction.

Keywords

Perovskite crystallization (111) preferred orientation Defect passivation Perovskite/silicon tandem solar cells
Liu, Jingjing, Biao Shi, Qiaojing Xu, Yucheng Li, Yuxiang Li, Pengfei Liu, Zetong SunLi, Xuejiao Wang, Cong Sun, Wei Han, Diannan Li, Sanlong Wang, Dekun Zhang, Guangwu Li, Xiaona Du, Ying Zhao, and Xiaodan Zhang. 2024. “Textured Perovskite/Silicon Tandem Solar Cells Achieving Over 30% Efficiency Promoted by 4-Fluorobenzylamine Hydroiodide”. Nano-Micro Letters 16 (May):189. https://doi.org/10.1007/s40820-024-01406-4.
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