Highly Efficient Monolithic Perovskite/TOPCon Silicon Tandem Solar Cells Enabled by “Halide Locking”
Abstract
Abstract Perovskite/silicon tandem solar cells (TSCs) are promising candidates for commercialization due to their outstanding power conversion efficiencies (PCEs). However, controlling the crystallization process and alleviating the phases/composition inhomogeneity represent a considerable challenge for perovskite layers grown on rough silicon substrates, ultimately limiting the efficiency and stability of TSC. Here, this study reports a “halide locking” strategy that simultaneously modulates the nucleation and crystal growth process of wide bandgap perovskites by introducing a multifunctional ammonium salt, thioacetylacetamide hydrochloride (TAACl), to bind with all types of cations and anions in the mixed halide perovskite precursor. The approach not only enables excellent compositional uniformity in the wet‐film stage but also induces preferred orientation along the (001) plane following nucleation, leading to enhanced homogeneity of the perovskite film in both vertical and horizontal directions over long‐length scales. The resulting wide‐bandgap perovskite solar cells yield exceptional open‐circuit voltage‐fill factor products ( V OC × FF) of 1.074 and 1.040 in small‐ (0.0414 cm 2 ) and large‐area (1.0208 cm 2 ) devices, respectively. Corresponding large‐area tandem solar cells based on the Tunnel Oxide Passivated Contact (TOPCon) silicon subcells achieve a record PCE of 31.32% with a remarkable V OC of 1.931 V and FF of 81.54%.
Article Details
Authors (28)
Lina Wang
Department of Chemistry, Advanced Institute of Future Energy, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Laboratory of Porous Materials for Separation and Conversion
Ning Wang
Xin Wu
Baoze Liu
Department of Chemistry City University of Hong Kong Kowloon 999077 Hong Kong
Qi Liu
Bo Li
Dong Zhang
School of Physical Science and Technology & Shanghai Key Laboratory of High-Resolution Electron Microscopy
Nikhil Kalasariya
Electronic Engineering Department The Chinese University of Hong Kong Shatin N.T. 999077 Hong Kong
Yuanfang Zhang
Xunlei Yan
Zhejiang Jinko Solar Co., Ltd. Haining Zhejiang 314416 China
Jungan Wang
Peiting Zheng
Zhejiang Jinko Solar Co., Ltd. Haining Zhejiang 314416 China
Jie Yang
Hao Jin
State Key Laboratory of Medical Proteomics, National Chromatographic Research & Analysis Center, Chinese Academy of Sciences Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences
Chenyue Wang
Liangchen Qian
Bin Yang
Yan Wang
Xuelan Cheng
Shenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology Center for Intense Laser Application Technology (iLaT) and College of Engineering Physics Shenzhen Technology University Shenzhen 518118 China
Tinglu Song
Experimental Center of Advanced Materials, School of Materials Science and Engineering
Martin Stolterfoht
Xiao Cheng Zeng
Xinyu Zhang
Menglei Xu
Zhejiang Key Laboratory of Advanced Tandem Photovoltaic Technology Zhejiang Jinko Solar Co. Ltd. Haining Zhejiang China
Yang Bai
Fang Xu
Key Laboratory of Optoelectronic Chemical Materials and Devices (Ministry of Education), School of Optoelectronic Materials and Technology
Cangtao Zhou
Shenzhen Key Laboratory of Ultra-intense Laser and Advanced Material Technology, Center for Intense Laser Application Technology, and College of Engineering Physics, Shenzhen Technology University , Shenzhen 518118,
Zonglong Zhu