Enhancing hole-conductor-free, printable mesoscopic perovskite solar cells through post-fabrication treatment via electrophilic reaction – Nature

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Nature Energy volume 10pages 1084–1094 (2025)
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Hole-conductor-free printable mesoscopic perovskite solar cells, fabricated by infiltrating perovskite into the preprinted porous TiO2/ZrO2/carbon triple-layer scaffold, offer an approach for the industrial production of photovoltaic panels. Here we introduce a reactive post-processing strategy using hexamethylene diisocyanate to enable efficient collection and transport of holes from the perovskite to the carbon electrode. Hexamethylene diisocyanate reacts with excess organic cations at the perovskite crystal terminations through an electrophilic reaction and reconstructs the grain boundaries and the back interface. The treatment passivates defects, facilitates hole transport in perovskite and enhances hole transfer from the perovskite to the carbon electrode. We achieve an efficiency of 23.2% for the laboratory-size device with an aperture area of 0.1 cm2 and 19.4% for the minimodule with an aperture area of 57.3 cm2. The devices retain 95% of their initial efficiency after 900 h of continuous operation at the maximum power point under elevated temperatures of 55 ± 5 °C.
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This work was supported by financial support from the National Natural Science Foundation of China (grant nos. 22439001 and 91733301 to H.H., 52172198 and 51902117 to A.M.). We thank the Analytical and Testing Center of Huazhong University of Science and Technology (HUST) for performing various characterization and measurements. The computing work in this Article is supported by the Public Service Platform of High-Performance Computing by the Network and Computing Center of HUST.
These authors contributed equally: Yongming Ma, Jiale Liu, Xiayan Chen.
Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, China
Yongming Ma, Jiale Liu, Xinran Zhao, Jianhang Qi, Chuanzhou Han, Guodong Zhang, Jiayu Xie, Kai Chen, Yanjie Cheng, Junwei Xiang, Yang Zhou, Furi Ling, Yinhua Zhou, Anyi Mei & Hongwei Han
WonderSolar Institute, Wuhan, China
Xiayan Chen, Bin She, Shuang Liu, Youyu Jiang & Yusong Sheng
School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, China
Li-Ming Yang
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H.H. organized the study; H.H. and A.M. conceived ideas for experiments and manuscript; H.H., A.M. and Y.M. designed the experiments; Y.M. was involved in all experiments; J.L., X.C., J.Q., B.S., S.L., Y.J. and Y.S. contributed to the fabrication of high-performance devices and modules; X.Z. and F.L. contributed to the numerical simulations; L.-M.Y. and C.H. conducted the DFT calculation; G.Z., J. Xie and K.C. contributed to the conductivity measurements; Y.C. and J. Xiang helped with the KPFM measurement; all authors were involved in the discussion of the results. H.H., A.M. and Y.M. wrote the manuscript, and Yang Zhou and Yinhua Zhou helped with revising.
Correspondence to Anyi Mei or Hongwei Han.
H.H. is the founder, adviser and chief scientist of WonderSolar. A.M. is a chief scientist of WonderSolar. The other authors declare no competing interests.
Nature Energy thanks Gerrit Boschloo, Carys Worsley and the other, anonymous, reviewers for their contribution to the peer review of this work.
Publisher’s note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
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Ma, Y., Liu, J., Chen, X. et al. Enhancing hole-conductor-free, printable mesoscopic perovskite solar cells through post-fabrication treatment via electrophilic reaction. Nat Energy 10, 1084–1094 (2025). https://doi.org/10.1038/s41560-025-01823-8
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DOI: https://doi.org/10.1038/s41560-025-01823-8
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