Sulfolane-Based Solvent Polishing of Perovskite Films for Optimized Solar Cells
Abstract
The complex crystallization of solution-processed polycrystalline perovskite films leads to the formation of deep-trap states, ultimately hindering the performance of perovskite solar cells (PSCs). Here, we have devised a facile and practical solvent polishing (SP) approach utilizing a sulfolane and chlorobenzene mixture to reconstruct the surface of triple-cation perovskite films. This strategy enables the removal of the surface-oriented phases containing trap sites, exposing compact vertically aligned crystalline domains with lower defectiveness and lower surface roughness, ultimately leading to enhanced carrier transport, facilitating interfacial charge extraction, and suppressing nonradiative recombination losses. Consequently, the PSCs fabricated with SP exhibit a higher power conversion efficiency (PCE) of 22.0% with a remarkable fill factor (FF) of 82%, surpassing the control device (20.5% PCE and 79% FF). Additionally, the SP-treated devices retain 94% of their initial efficiency after 40 days at 40% relative humidity, indicating improved shelf stability under moderately humid conditions.
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BibTeX
@article{jeronimorendon2026sulfolanebased,
title = {{Sulfolane-Based Solvent Polishing of Perovskite Films for Optimized Solar Cells}},
author = {Jose J Jeronimo-Rendon and Mahdi Malekshahi Byranvand and Sofya Svetlosanova and Rajarshi Roy and Seyma Topcu and Asfaw Negash and Mayank Kedia and Somayeh Gholipour and Anna Zhuravlova and Paolo Samorì and Antonio Gaetano Ricciardulli and Michael Saliba},
journal = {ACS Energy Letters},
year = {2026},
month = oct,
doi = {10.1021/acsenergylett.6c01307},
url = {https://univoak.hal.science/hal-05842237v1},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Sulfolane-Based Solvent Polishing of Perovskite Films for Optimized Solar Cells
AU - Jose J Jeronimo-Rendon
AU - Mahdi Malekshahi Byranvand
AU - Sofya Svetlosanova
AU - Rajarshi Roy
AU - Seyma Topcu
AU - Asfaw Negash
AU - Mayank Kedia
AU - Somayeh Gholipour
AU - Anna Zhuravlova
AU - Paolo Samorì
AU - Antonio Gaetano Ricciardulli
AU - Michael Saliba
PY - 2026
DA - 2026/10/09
JO - ACS Energy Letters
DO - 10.1021/acsenergylett.6c01307
UR - https://univoak.hal.science/hal-05842237v1
AB - The complex crystallization of solution-processed polycrystalline perovskite films leads to the formation of deep-trap states, ultimately hindering the performance of perovskite solar cells (PSCs). Here, we have devised a facile and practical solvent polishing (SP) approach utilizing a sulfolane and chlorobenzene mixture to reconstruct the surface of triple-cation perovskite films. This strategy enables the removal of the surface-oriented phases containing trap sites, exposing compact vertically aligned crystalline domains with lower defectiveness and lower surface roughness, ultimately leading to enhanced carrier transport, facilitating interfacial charge extraction, and suppressing nonradiative recombination losses. Consequently, the PSCs fabricated with SP exhibit a higher power conversion efficiency (PCE) of 22.0% with a remarkable fill factor (FF) of 82%, surpassing the control device (20.5% PCE and 79% FF). Additionally, the SP-treated devices retain 94% of their initial efficiency after 40 days at 40% relative humidity, indicating improved shelf stability under moderately humid conditions.
SN - 2380-8195
SN - 2380-8195
ER -