A (111) Facet‐Dominated Carbon Dots‐Perovskite Composite Crystal Matrix for Highly Stable Photodetector

IF 13 2区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Small Pub Date : 2025-06-27 DOI:10.1002/smll.202501181

Ying Li, Jun Xing, Rongxue Zhou, Yixuan Li, Ziyuan Huang, Zhicheng Zhu, Hang Zang, Zhenhuang Su, Xiaojuan Sun, Bai Yang, Weili Yu, Dabing Li

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引用次数: 0

Abstract

Crystal facet orientation plays a key role in dominating the optoelectronic conversion and stability of perovskite devices. To date, in‐depth understanding on how to control the orientation of crystal facet and its’ effect on the optoelectronic properties of perovskites remains a significant challenge. Here, a strategy for manipulating the facet orientation of methylammonium lead bromide (MAPbBr3) perovskite single crystals utilizing carbon dots (CDs) is proposed, which can expose the (111) facet by reducing the surface energy of specific crystal facets selectively and improve the optoelectronic properties by CDs incorporation simultaneously. Experimental and theoretical studies indicate that the CDs are prefer to adsorb on the (111) facet and the (111) facet‐dominated CDs‐perovskite composite crystal matrixes exhibit significantly improved optoelectronic properties compared to perovskite crystal dominated by the (100) facet Consequently, the (111) facet‐dominated perovskite photodetector demonstrates exceptional performance, with a responsivity as high as 249.09 A W−1 and a detectivity of 1.19 × 1014 Jones. More significantly, the unencapsulated photodetector shows remarkable stability, maintaining a record 93% of its initial performance over 90 d. This work provides a novel way to enhance the performance of halide perovskites photodetectors by crystal facet orientation modulation strategy, especially the stability.

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A（111）面控碳点钙钛矿复合晶体基质用于高稳定光电探测器

晶面取向对钙钛矿器件的光电转换和稳定性起着关键的控制作用。迄今为止，深入了解如何控制晶面取向及其对钙钛矿光电性能的影响仍然是一个重大挑战。本文提出了一种利用碳点（CDs）控制甲基溴化铅（MAPbBr3）钙钛矿单晶面取向的策略，该策略可以通过选择性地降低特定晶体面表面能来暴露（111）面，同时通过加入CDs来改善光电性能。实验和理论研究表明，CDs更倾向于吸附在（111）面上，而（111）面主导的CDs -钙钛矿复合晶体基质的光电性能明显优于（100）面主导的钙钛矿晶体。因此，（111）面主导的钙钛矿光电探测器表现出优异的性能，其响应率高达249.09 a W−1，探测率为1.19 × 1014 Jones。更重要的是，未封装的光电探测器表现出显著的稳定性，在90 d内保持了93%的初始性能。本工作为通过晶面取向调制策略提高卤化物钙钛矿光电探测器的性能，特别是稳定性提供了一种新的途径。

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.