Dual-intermediator guided methodical molecular exchange towards optimized crystallization kinetics of advanced perovskite solar cells

IF 16.8 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Nano Energy Pub Date : 2025-05-21 DOI:10.1016/j.nanoen.2025.111169

Yue Peng , Qiyao Guo , Yueji Liu , Qi Chen , Wenqing Lang , Yu Yang , Jie Dou , Yingli Wang , Xinyu Zhang , Jialong Duan , Yuanyuan Zhao , Xiya Yang , Weilin Chen , Qunwei Tang

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Abstract

Sequential deposition has been demonstrated to provide a maneuverable and reproducible crystallization process for formamidinium-lead triiodide (FAPbI₃) perovskite solar cells (PSCs). However, the uncontrollable PbI₂ transformation by organic cations brings great challenges to ideal perovskite films. The state-of-the-art studies predominantly emphasize either PbI₂-intermediate phases or the use of FA⁺-retardants to slow down intramolecular exchange, lacking of comprehensive investigation into bilateral coordination enabled methodical molecular exchange for the rational growth of α-FAPbI₃ films. In this study, we launch a dual-intermediator strategy involving 1,3-propanediamine (DAP) and 4-aminobutyric acid (GABA) to bilaterally regulate the crystallization kinetics of FAPbI₃. This dual-intermediator line synergistically advances efficient and direct α-FAPbI₃ phase transition with preferred orientation and fewer defects, generating improved energetic alignment and charge transport dynamics in PSCs. Encouragingly, the best PSC free of encapsulation delivers a champion efficiency of 25.52 % and retains 95.2 % efficiency after 1200 h of maximum power point tracking under continuous AM 1.5 G illumination in N₂ at 50 ℃.

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双中间体引导有序分子交换优化先进钙钛矿太阳能电池结晶动力学

顺序沉积已被证明为三碘化甲醛-铅（FAPbI3）钙钛矿太阳能电池（PSCs）提供了一种可操作且可重复的结晶过程。然而，有机阳离子对PbI2的不可控转化给理想的钙钛矿薄膜带来了很大的挑战。目前的研究主要强调pbi2 -中间相或使用FA+-缓蚀剂来减缓分子内交换，缺乏对双边配位实现有序分子交换以实现α-FAPbI3膜的合理生长的全面研究。在本研究中，我们启动了涉及1,3-丙二胺（DAP）和4-氨基丁酸（GABA）的双中间体策略，以双边调节FAPbI3的结晶动力学。这条双中间体线协同推进了α-FAPbI3高效直接的相变，具有更优的取向和更少的缺陷，从而改善了psc的能量取向和电荷输运动力学。令人鼓舞的是，无封装的最佳PSC可提供25.52%的冠军效率，并在50℃的N2中连续AM 1.5 G照明下，在最大功率点跟踪1200小时后保持95.2%的效率。

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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.