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High-performance perovskite/silicon heterojunction solar cells enabled by industrially compatible post annealing
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  • Guangyi Wang,
  • Zongyi Yue,
  • Zengguang Huang,
  • Wenzhu Liu,
  • Rui Tong,
  • Haipeng Yin,
  • Lifei Yang,
  • Fucheng Yu,
  • Zongyang Sun,
  • Sihua Zhong
Guangyi Wang
Jiangsu Ocean University
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Zongyi Yue
Jiangsu Ocean University
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Zengguang Huang
Jiangsu Ocean University
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Wenzhu Liu
Shanghai Institute of Microsystem and Information Technology
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Rui Tong
JA Solar Technology Co Ltd
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Haipeng Yin
JA Solar Technology Co Ltd
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Lifei Yang
SuZhou GH New Energy Tech Co Ltd
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Fucheng Yu
Jiangsu Ocean University
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Zongyang Sun
Jinghaiyang Semiconductor Materials Co Ltd
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Sihua Zhong
Jiangsu Ocean University

Corresponding Author:[email protected]

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In recent years, developing dopant-free carrier-selective contacts, instead of heavily doped Si layer (either externally or internally), for crystalline silicon (c-Si) solar cells have attracted considerable interests with the aims to reduce parasitic light absorption and fabrication cost. However, the stability still remains a big challenge for dopant-free contacts, especially when thermal treatment is involved, which limits their industrial adoption. In this study, a perovskite material ZnTiO 3 combining with an ultrathin (~1 nm) SiO 2 film and Al layer is used as an electron-selective contact, forming an isotype heterojunction with n-type c-Si. The perovskite/c-Si heterojunction solar cells exhibit a performance-enhanced effect by post-metallization annealing when the annealing temperature is 200-350 °C. Thanks to the post-annealing treatment, an impressive efficiency of 22.0% has been demonstrated, which is 3.5% in absolute value higher than that of the as-fabricated solar cell. A detailed material and device characterization reveal that post annealing leads to the diffusion of Al into ZnTiO 3 film, thus doping the film and reducing its work function. Besides, the coverage of SiO 2 is also improved. Both these two factors contribute to the enhanced passivation effect and electron selectivity of the ZnTiO 3-based contact, and hence improve the cell performance.
18 Jan 2023Review(s) Completed, Editorial Evaluation Pending
18 Jan 2023Submitted to Progress in Photovoltaics
18 Jan 2023Submission Checks Completed
18 Jan 2023Assigned to Editor
03 Feb 2023Reviewer(s) Assigned
23 Feb 2023Editorial Decision: Revise Minor
07 Mar 20231st Revision Received
13 Mar 2023Submission Checks Completed
13 Mar 2023Assigned to Editor
13 Mar 2023Review(s) Completed, Editorial Evaluation Pending
14 Mar 2023Editorial Decision: Accept