Interfacial seed-assisted FAPbI3 crystallization and phase stabilization enhances the performance of all-air-processed perovskite solar cells

IF 3.5 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Dalton Transactions Pub Date : 2025-01-17 DOI:10.1039/d4dt03120b

Yuan Liu, Xingyuan Zhou, Yupei Wu, Hongwei Zhang, Kun Cao

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引用次数: 0

Abstract

Formamidine lead triiodide (FAPbI3) has received significant attention in the field of perovskite solar cells (PSCs) owing to its excellent optoelectronic properties and high thermal stability. However, the photoactive α-FAPbI3 perovskites are highly susceptible to degradation into non-perovskite δ-FAPbI3 phases especially under humid conditions, which severely diminishes the device performance of FAPbI3 PSCs. Here, we propose an interfacial seeding strategy for regulating crystallization and stabilizing α-FAPbI3 perovskites in humid air. By post-treating the antisolvent-free, air-processed perovskite wet film with inorganic cesium lead triiodide (CsPbI3) nanocrystals, a functional seed layer is formed that effectively mitigates the erosion by humid air while facilitating the conversion of intermediates to the α-FAPbI3 phase. The interfacial seed-modified FAPbI3 perovskite films exhibit improved crystal quality and denser morphology. As a result, the efficiency of all-air-processed carbon-based PSCs is improved from 15.90% for the control to 18.04%. In addition, the unencapsulated PSCs based on interfacial seed-modified FAPbI3 films show improved environmental stability compared to the control counterparts, maintaining 80% of its initial efficiency after 60 days.

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界面种子辅助的FAPbI3结晶和相稳定提高了全空气处理钙钛矿太阳能电池的性能

三碘化甲脒铅（FAPbI3）由于其优异的光电性能和较高的热稳定性在钙钛矿太阳能电池（PSCs）领域受到广泛关注。然而，光活性α-FAPbI3钙钛矿极易降解为非钙钛矿δ-FAPbI3相，特别是在潮湿条件下，这严重降低了FAPbI3 PSCs的器件性能。在此，我们提出了一种界面播种策略来调节α-FAPbI3钙钛矿在潮湿空气中的结晶和稳定。用无机三碘化铯铅（CsPbI3）纳米晶体后处理无抗溶剂的空气处理钙钛矿湿膜，形成功能种子层，有效减轻潮湿空气的侵蚀，同时促进中间体向α-FAPbI3相的转化。界面种子修饰的FAPbI3钙钛矿膜具有更好的晶体质量和更致密的形貌。结果，全空气处理碳基PSCs的效率从控制组的15.90%提高到18.04%。此外，基于界面种子修饰的FAPbI3膜的未封装psc与对照相比，表现出更好的环境稳定性，在60天后保持了80%的初始效率。

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

Dalton Transactions 化学-无机化学与核化学

CiteScore

6.60

自引率

7.50%

发文量

1832

审稿时长

1.5 months

期刊介绍： Dalton Transactions is a journal for all areas of inorganic chemistry, which encompasses the organometallic, bioinorganic and materials chemistry of the elements, with applications including synthesis, catalysis, energy conversion/storage, electrical devices and medicine. Dalton Transactions welcomes high-quality, original submissions in all of these areas and more, where the advancement of knowledge in inorganic chemistry is significant.