Oxidization Strategy of Coordinating Solvents Mitigates Composition Segregation in Perovskite

IF 16.8 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Nano Energy Pub Date : 2025-01-25 DOI:10.1016/j.nanoen.2025.110717

Xudong Liu, Xuewei Jiao, Song Yin, Nasir Ali, Mingxuan Liu, Bingshun Xu, Shaopeng Yang, Weiguang Kong

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Abstract

The presence of halogen Schottky defects in the lattice structure of metal halide perovskites (MHPs) lowers the activation energy for ion migration. In this study, MAPbI₃ was employed as the perovskite prototype to investigate the source and inhibition mechanisms of halogen-ion-related point defects. Our findings indicate that the spatial separation of MA⁺-PbI₃^- and/or MAI-PbI₂ induced by the utilization of the pristine coordinating solvents is the main cause for the iodine Schottky defects. By introducing an oxidized coordinating solvent (o-NMP), a rapid in-situ reaction between MAI and PbI₂ can occur with the assistance of a reversible redox reaction in solution. Consequently, an enhanced power conversion efficiency (PCE) is observed, exceeding 22% for MAPbI₃-based perovskite solar cells (PSCs) and approaching 24% for FAMA mixed devices fabricated using a room-temperature blade coating method. Both the efficiency values under the corresponding perovskite systems are among the highest records achieved with similar processing techniques. Moreover, the PSCs exhibit improved stability against sunlight exposure, external electric fields, and moisture infiltration.

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来源期刊

Nano Energy CHEMISTRY, PHYSICAL-NANOSCIENCE & NANOTECHNOLOGY

CiteScore

30.30

自引率

7.40%

发文量

1207

审稿时长

23 days

期刊介绍： Nano Energy is a multidisciplinary, rapid-publication forum of original peer-reviewed contributions on the science and engineering of nanomaterials and nanodevices used in all forms of energy harvesting, conversion, storage, utilization and policy. Through its mixture of articles, reviews, communications, research news, and information on key developments, Nano Energy provides a comprehensive coverage of this exciting and dynamic field which joins nanoscience and nanotechnology with energy science. The journal is relevant to all those who are interested in nanomaterials solutions to the energy problem. Nano Energy publishes original experimental and theoretical research on all aspects of energy-related research which utilizes nanomaterials and nanotechnology. Manuscripts of four types are considered: review articles which inform readers of the latest research and advances in energy science; rapid communications which feature exciting research breakthroughs in the field; full-length articles which report comprehensive research developments; and news and opinions which comment on topical issues or express views on the developments in related fields.