Modulating Perovskite Film Crystallization with Nipecotic Acid for High-Performance Perovskite Solar Cells.

IF 12.1 2区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Small Pub Date : 2025-10-25 DOI:10.1002/smll.202509076

Haoyi Zhang,Jingyun Wei,Di Zhang,Jiafan Zhang,Yujie Liu,Renxuan Wang,Yanyan Li,Shengzhong Frank Liu,Jiangshan Feng,Xuediao Cai

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Abstract

The fabrication of high-quality perovskite films plays a pivotal role in enhancing the power conversion efficiency (PCE) of perovskite solar cells (PSCs). This enhancement can be achieved by modulating the crystallization kinetics of the perovskite film. In this paper, nipecotic acid (NA) is employed as an additive to regulate the crystallization process to mitigate defect formation within the perovskite film. The mechanism is corroborated through in situ ultraviolet/visible (UV/Vis) absorption and photoluminescence (PL) measurements. Furthermore, NA facilitates the modulation of perovskite crystal orientation, as verified by grazing-incidence wide-angle X-ray scattering (GIWAXS) and X-ray diffraction (XRD) analyses. Utilizing the NA additive, perovskite films exhibiting superior quality and reduced defect density are successfully fabricated. A champion device achieves a PCE of 24.76%. Remarkably, this device retains 94.04% of its initial PCE after 960 h of storage under ambient conditions (25 °C, 25% relative humidity, RH), demonstrating exceptional environmental stability.

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高性能钙钛矿太阳能电池中钙钛矿膜晶化的调控研究。

制备高质量的钙钛矿薄膜对提高钙钛矿太阳能电池的功率转换效率（PCE）起着至关重要的作用。这种增强可以通过调节钙钛矿薄膜的结晶动力学来实现。本文采用硝酸钠作为添加剂来调节钙钛矿膜的结晶过程，以减轻钙钛矿膜内缺陷的形成。通过原位紫外/可见（UV/Vis）吸收和光致发光（PL）测量证实了其机理。此外，掠入射广角x射线散射（GIWAXS）和x射线衍射（XRD）分析证实了NA有助于钙钛矿晶体取向的调制。利用NA添加剂，成功制备了具有优良质量和降低缺陷密度的钙钛矿薄膜。冠军设备的PCE达到24.76%。值得注意的是，该设备在环境条件下（25°C， 25%相对湿度，RH）储存960小时后，其初始PCE仍保持94.04%，表现出卓越的环境稳定性。

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

Small 工程技术-材料科学：综合

CiteScore

17.70

自引率

3.80%

发文量

1830

审稿时长

2.1 months

期刊介绍： Small serves as an exceptional platform for both experimental and theoretical studies in fundamental and applied interdisciplinary research at the nano- and microscale. The journal offers a compelling mix of peer-reviewed Research Articles, Reviews, Perspectives, and Comments. With a remarkable 2022 Journal Impact Factor of 13.3 (Journal Citation Reports from Clarivate Analytics, 2023), Small remains among the top multidisciplinary journals, covering a wide range of topics at the interface of materials science, chemistry, physics, engineering, medicine, and biology. Small's readership includes biochemists, biologists, biomedical scientists, chemists, engineers, information technologists, materials scientists, physicists, and theoreticians alike.