Role of Antisolvent in Additive-Guided Crystallization for High-Efficiency HTL-Free Sn-Pb Perovskite Solar Cells

Yun Shan Li^a, Chieh Ting Lin^a

^aDepartment of Chemical Engineering, National Chung Hsing University, Taichung, Taiwan

NIPHO26
Proceedings of International Conference on Perovskite Thin Film Photovoltaics and Perovskite Photonics and Optoelectronics (NIPHO26)

Pavia, Italy, 2026 June 8th - 9th

Organizers: Giulia Grancini, Feng Gao and Robert Hoye

Poster, Yun Shan Li, 029
Publication date: 22nd April 2026

Sn-Pb perovskite solar cells (PSCs) hold great promise for high-efficiency photovoltaic applications¹, yet their performance remains limited in hole-transport-layer-free (HTL-free) architectures due to low shunt resistance, enhanced interfacial recombination, and reduced fill factors.² In addition, conventional antisolvent-assisted crystallization introduces processing complexity, environmental concerns, and batch-to-batch variability.³ Herein, we report an antisolvent-free Vacuum Quenching (VACQ) strategy for fabricating high-efficiency HTL-free Sn-Pb PSCs. The VACQ process suppresses void formation, particularly at the buried interface, enabling compact, uniform, and pinhole-free perovskite films. As a result, VACQ-processed devices exhibit improved shunt resistance and a record-high fill factor among reported HTL-free Sn-Pb PSCs.² The champion device achieves a PCE exceeding 20.82% with an FF above 80%, demonstrating a simple, scalable, and environmentally friendly route toward high-performance Sn-Pb perovskite photovoltaics.

References:

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[2] T. Ma, H. Wang, Z. Wu, Y. Zhao, C. Chen, X. Yin, L. Hu, F. Yao, Q. Lin, S. Wang, D. Zhao, X. Li, C. Wang, T. Ma, H. Wang, Z. Wu, Y. Zhao, S. Wang, X. Li, C. Wang, C. Chen and D. Zhao, Advanced Materials, 2024, 36, 2308240.

[3] Y. Gou, S. Tang, C. Yuan, P. Zhao, J. Chen and H. Yu, Mater. Horiz., 2024, 11, 3465–3481.

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