Crystallization regulation and defect suppression of CsPbI2Br perovskite using a dual-functional additive

IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-04-14 DOI:10.1063/5.0260577

Zhi Zhu, Jing Xu, Yuhan Zhou, Shisheng Ge, Tao Yu, Jie Yang, Chunxiong Bao, Zhigang Zou

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引用次数: 0

Abstract

Inorganic CsPbI2Br perovskite solar cells have attracted widespread attention due to their outstanding performance and photo-thermal stability. However, the rapid crystallization of the solution-processed CsPbI2Br film often results in poor crystallinity and a high density of defects, which seriously restrict the improvement of the device performance. Here, we introduce a dual-functional additive, 4-amino-5-aminomethyl-2-methylpyrimidine (AMP), to regulate the crystallization and reduce the defect density of the CsPbI2Br film. The introduction of AMP notably improves the crystallinity and morphology of the CsPbI2Br film and promotes a preferred crystal orientation. The C=N and amino groups in AMP interact with Pb2+ and Br- in the perovskite, respectively, effectively passivating the defects and improving the carrier lifetime. As a result, the power conversion efficiency of the optimized carbon-based hole-transport layer-free device reaches 13.30%, which exceeds the 10.66% of the control device. The environmental and light stability of the device is also significantly improved. This work provides valuable insights into the development of high-performance all-inorganic perovskite solar cells via additive strategies.

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无机 CsPbI2Br 包晶石太阳能电池因其卓越的性能和光热稳定性而受到广泛关注。然而，溶液法 CsPbI2Br 薄膜的快速结晶往往导致结晶度差、缺陷密度高，严重制约了器件性能的提高。在这里，我们引入了一种双功能添加剂--4-氨基-5-氨基甲基-2-甲基嘧啶（AMP）来调节 CsPbI2Br 膜的结晶并降低缺陷密度。AMP 的引入明显改善了 CsPbI2Br 薄膜的结晶度和形态，并促进了优先晶体取向。AMP 中的 C=N 和氨基分别与过氧化物中的 Pb2+ 和 Br- 相互作用，有效地钝化了缺陷，提高了载流子寿命。因此，优化后的无碳基空穴传输层器件的功率转换效率达到了 13.30%，超过了对照器件的 10.66%。该器件的环境和光稳定性也得到了显著改善。这项工作为通过添加策略开发高性能全无机包晶太阳能电池提供了宝贵的启示。

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.