DataVXAdvanced MaterialsPaper
journal article·2025-02Open access

Highly Efficient Monolithic Perovskite/TOPCon Silicon Tandem Solar Cells Enabled by “Halide Locking”

Lina Wang, Ning Wang, Xin Wu, Baoze Liu, Qi Liu, Bo Li, Dong Zhang, Nikhil Kalasariya, Yuanfang Zhang, Xunlei Yan, Jungan Wang, Peiting Zheng, Jie Yang, Hao Jin, Chenyue Wang, Liangchen Qian, Bin Yang, Yan Wang, Xuelan Cheng, Tinglu Song, Martin Stolterfoht, Xiao Cheng Zeng, Xinyu Zhang, Menglei Xu, Yang Bai, Fang Xu, Cangtao Zhou, Zonglong Zhu

Advanced Materials· Volume 37· Issue 7
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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 (VOC × FF) of 1.074 and 1.040 in small‐ (0.0414 cm2) and large‐area (1.0208 cm2) 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 VOC of 1.931 V and FF of 81.54%.
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Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Chalcogenide Semiconductor Thin Films · Quantum Dots Synthesis And Properties

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

Affiliations

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

Department of Chemistry City University of Hong Kong Kowloon 999077 Hong Kong

Department of Materials Science and Engineering City University of Hong Kong Kowloon 999077 Hong Kong

Electronic Engineering Department The Chinese University of Hong Kong Shatin N.T. 999077 Hong Kong

Zhejiang Jinko Solar Co., Ltd. Haining Zhejiang 314416 China

Shanghai Synchrotron Radiation Facility (SSRF) Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201204 China

Experimental Centre for Advanced Materials School of Materials Science and Engineering Beijing Institute of Technology Beijing 100081 China

Shenzhen Research Institute City University of Hong Kong Shenzhen 518057 China

Funding

National Natural Science Foundation of China · National Key Research and Development Program of China · Science, Technology and Innovation Commission of Shenzhen Municipality · Research Grants Council, University Grants Committee · Innovation and Technology Fund

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