Solvent-hydrolysis-driven engineering of ordered single quantum well 2D perovskites

IF 7.7 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Science China Materials Pub Date : 2026-05-14 DOI:10.1007/s40843-025-3977-8

Siliang Hu (, ), Weijun Wang (, ), Dongchang He (, ), Yi Shen (, ), Da Xiong (, ), Yunfan Wang (, ), Haifan Li (, ), Boxiang Gao (, ), Mengxue Chen (, ), Shuai Zhang (, ), Dylan Xiangyu Fan (, ), Zhengxun Lai (, ), Sai-Wing Tsang (, ), Chun-Yuen Wong (, ), Johnny C. Ho (, )

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引用次数: 0

Abstract

Single quantum well (single-QW) two-dimensional (2D) perovskites are set to transform optoelectronic devices due to their stability and superior properties. However, solution-processed 2D perovskites often form disordered multiple-QW structures, leading to inconsistent performance. Here, we present a solvent-hydrolysis-driven method for controlling crystallization kinetics, resulting in highly ordered single-QW 2D perovskite films. Dimethylamine (DMA), formed from the hydrolysis of N,N-dimethylformamide (DMF), acts as a key mediator, preventing cluster aggregation and ensuring uniform colloidal distribution. This process avoids a heterogeneous intermediate phase, thereby fostering the formation of a homogeneous (DMA,MA)PbI₃ phase, which is crucial for the development of single-QW films. The resulting photodetector demonstrates outstanding performance, with a responsivity of 1153 mA/W and a detectivity of 6.98 × 10¹² Jones, along with excellent photostability under ambient conditions. These attributes make it ideal for photoelectric imaging sensors and large-scale integration. Our findings provide a scalable, solution-processed strategy for high-performance 2D perovskite materials, opening up new possibilities for advanced optoelectronic applications.

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有序单量子阱二维钙钛矿的溶剂水解驱动工程

单量子阱（Single - qw）二维（2D）钙钛矿由于其稳定性和优越的性能而被用来改造光电器件。然而，溶液处理的二维钙钛矿往往形成无序的多量子阱结构，导致性能不一致。在这里，我们提出了一种溶剂水解驱动的方法来控制结晶动力学，从而产生高度有序的单量子阱二维钙钛矿薄膜。二甲胺（DMA）是由N，N-二甲基甲酰胺（DMF）水解形成的，它是一种关键的介质，可以防止团簇聚集，确保胶体均匀分布。该工艺避免了异质中间相的形成，从而促进了均匀（DMA，MA）PbI3相的形成，这对于单量子阱薄膜的发展至关重要。所制备的光电探测器性能优异，响应率为1153 mA/W，探测率为6.98 × 1012 Jones，在环境条件下具有优异的光稳定性。这些特性使其成为光电成像传感器和大规模集成的理想选择。我们的研究结果为高性能二维钙钛矿材料提供了一种可扩展的解决方案处理策略，为先进的光电应用开辟了新的可能性。

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来源期刊

Science China Materials Materials Science-General Materials Science

CiteScore

11.40

自引率

7.40%

发文量

949

期刊介绍： Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.