Branched intercalating cations regulate the structural evolution of two-dimensional perovskites

IF 6.9 2区综合性期刊 Q1 CHEMISTRY, MULTIDISCIPLINARY

Cell Reports Physical Science Pub Date : 2025-03-29 DOI:10.1016/j.xcrp.2025.102509

Wenxuan Li, Jianjia He, Yilan Zhang, Le Ye, Guoying Yao, Zixuan Zhang, Shiang Li, Xinhui Lu, Haipeng Lu, Tao Zeng, Zhenyu Yang

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Abstract

Two-dimensional metal halide perovskites (TMHPs) have emerged as prominent semiconductor materials in optoelectronic devices due to their composition-dependent properties. While previous research has concentrated on the types and the lengths of cations affecting TMHPs, our study systematically explores a new series of Dion-Jacobson (DJ)-phase TMHP structures featuring dithioketal-containing organic cations. Through X-ray crystallography and spectroscopy analyses, we demonstrate that steric hindrance from longer-branched groups distorts the structures and influences the photophysical behaviors of TMHPs. Additionally, we observe thermodynamically driven transitions from the DJ phase to the Ruddlesden-Popper (RP) phase when incorporating cations with extended branches, further impacting their structural and optoelectronic characteristics. Understanding and controlling these structural changes enable the design of TMHPs with tailored properties, opening avenues for advanced materials that enhance device performance.

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支化插层阳离子调控二维钙钛矿的结构演化

二维金属卤化物钙钛矿（TMHPs）由于其与成分相关的特性而成为光电子器件中重要的半导体材料。以往的研究主要集中在影响TMHP的阳离子的类型和长度上，而我们的研究系统地探索了一系列新的Dion-Jacobson （DJ）相TMHP结构，其特征是含有二硫代酮的有机阳离子。通过x射线晶体学和光谱学分析，我们证明了来自长支基的位阻扭曲了TMHPs的结构并影响了其光物理行为。此外，我们观察到当加入具有延伸分支的阳离子时，从DJ相到Ruddlesden-Popper （RP）相的热力学驱动转变，进一步影响了它们的结构和光电子特性。了解并控制这些结构变化，可以设计出具有定制特性的TMHPs，为提高设备性能的先进材料开辟了道路。

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

Cell Reports Physical Science Energy-Energy (all)

CiteScore

11.40

自引率

2.20%

发文量

388

审稿时长

62 days

期刊介绍： Cell Reports Physical Science, a premium open-access journal from Cell Press, features high-quality, cutting-edge research spanning the physical sciences. It serves as an open forum fostering collaboration among physical scientists while championing open science principles. Published works must signify significant advancements in fundamental insight or technological applications within fields such as chemistry, physics, materials science, energy science, engineering, and related interdisciplinary studies. In addition to longer articles, the journal considers impactful short-form reports and short reviews covering recent literature in emerging fields. Continually adapting to the evolving open science landscape, the journal reviews its policies to align with community consensus and best practices.