A strategy for enhancing phosphine oxide passivation capacity of perovskite solar cells by fluorination

IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-01-15 DOI:10.1063/5.0232569

Sichang Liu, Bingqian Sun, Ding Hu, Hongxing Li, Yiling Li, Jia Yang, Gang Liu, Xiaoming Yuan, Hanyue Chen, Lili Ke

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引用次数: 0

Abstract

Perovskite solar cells have experienced rapid development in the last few years due to their excellent photovoltaic properties, and their efficiency and stability have attracted widespread attention. Passivating interfacial defects has been universally recognized as an effective performance enhancement strategy for perovskite solar cells (PSCs), but most reported strategies often fail to simultaneously meet the requirements of efficiency and stability. This paper proposes to enhance the passivation function of phosphine oxide by fluorination. On the one hand, P=O is used to form coordination bonds with Pb2+ in perovskite. On the other hand, the strong hydrophobicity of F gives perovskite excellent moisture stability and can hydrogen bond to organic cations in the perovskite. Thanks to its strong chelation with the defect sites, it achieved optimized energy level arrangement, suppressed non-radiative recombination, and excellent operation stability. Consequently, the efficiency of the optimized device increased by 21.6% with a remarkable enhancement of 40 mV in VOC and remained more than 90% of its initial efficiency after aging in air environment for 1000 h, improving both efficiency and stability. This study demonstrates a promising functional modification strategy for constructing efficient, stable, and environmentally friendly PSCs.

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氟化提高钙钛矿太阳能电池氧化膦钝化能力的策略

钙钛矿太阳能电池由于其优异的光伏性能，近年来得到了迅速的发展，其效率和稳定性受到了广泛的关注。钝化界面缺陷是钙钛矿太阳能电池（PSCs）的一种有效的性能增强策略，但大多数报道的策略往往不能同时满足效率和稳定性的要求。提出用氟化法增强氧化膦的钝化功能。一方面，P=O与钙钛矿中的Pb2+形成配位键。另一方面，F的强疏水性使钙钛矿具有优异的水分稳定性，并能与钙钛矿中的有机阳离子形成氢键。由于其与缺陷位点的强螯合作用，实现了优化的能级排列，抑制了非辐射复合，具有优异的运行稳定性。因此，优化后的器件效率提高了21.6%，VOC值显著提高了40 mV，在空气环境中老化1000 h后仍保持在初始效率的90%以上，效率和稳定性都得到了提高。该研究为构建高效、稳定、环保的PSCs提供了一种有前途的功能修饰策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.