Ultrastable Silica-Confined CsSnI 3 Perovskite Nanocrystals for Noncontact Near-Infrared Light Communication and Sunlight–Thermal–Electric Conversion

作者：Xinjie Jiang, Hanyan Huang, Kehao Wang, Xingliang Dai, Zhizhen Ye, Haiping He, Chao Fan · 发表于：ACS Nano · 年份：2025 · DOI：10.1021/acsnano.5c12343 · 被引用次数：4 · 研究领域：Perovskite Materials and Applications、Quantum Dots Synthesis And Properties、Optical properties and cooling technologies in crystalline materials

Conventional infrared photothermal materials (IR-PTMs) face significant challenges regarding environmental stability and complex synthesis, limiting their practical applications. In this work, we report silica-confined CsSnI 3 perovskite nanocrystals (CsSnI 3 @silica NCs) via a simple solid-state calcination method. The silica-confined structure endows CsSnI 3 @silica NCs with a high near-infrared (NIR) photothermal performance and environmental stability. Accelerated aging tests under high humidity, high temperature, and intense NIR irradiation demonstrate the better stability of CsSnI 3 @silica NCs compared to unconfined CsSnI 3 powders and commercial graphene IR-PTM. A noncontact NIR light communication system is designed by combining CsSnI 3 @silica NC-based photothermal imaging with machine learning. This system achieves 99.7% accuracy in recognizing symbol (letters and numbers) images written by NIR light and enables robotic arm manipulation for noncontact human–robot interaction. Furthermore, incorporating these CsSnI 3 @silica NCs as a light-absorption layer in a sunlight–thermal–electric conversion system can enhance the output voltage by over 350% throughout a continuous six-month outdoor exposure period.