Low-Temperature Purification of Intermediate Phases for Enhanced Stability and Efficiency in FAPbI3 Solar Cells

IF 16.8 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Nano Energy Pub Date : 2025-03-31 DOI:10.1016/j.nanoen.2025.110945

Qin Gao , Can Wang , Yi Pan , Zeping Ou , Peidong Chen , Kun Chen , Zhenhuang Su , Bingchen He , Jianqiang Qin , Haoxuan Guo , Yujie Zheng , Shanshan Chen , Tingming Jiang , Yingguo Yang , Juan Du , Nabonswende Aida Nadege Ouedraogo , Xingyu Gao , Kuan Sun

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Abstract

Formamidinium lead triiodide (FAPbI₃) is a highly promising absorber layer for perovskite solar cells (PSCs) due to its optimal bandgap and improved thermal stability. However, the two-step deposition method, commonly employing ammonium salt solutions, often yields multiple intermediate phases, resulting in uneven and poorly crystalline FAPbI₃ films. To address this, we implemented a low-temperature treatment (LTT) to suppress the formation of these undesired intermediates. This approach yielded significantly improved FAPbI₃ film quality, characterized by reduced defect density, as well as enhanced charge carrier transport and extraction kinetics, effectively suppressing non-radiative recombination. Consequently, the LTT strategy resulted in a substantial increase in power conversion efficiency (PCE) – up to 25.43% – alongside improved device reproducibility, stability, and long-term performance. This work highlights the role of temperature in the crystal growth of perovskite absorber layer.

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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.