Ultrastable Silica-Confined CsSnI<sub>3</sub> Perovskite Nanocrystals for Noncontact Near-Infrared Light Communication and Sunlight-Thermal-Electric Conversion.
basic_science · Level V
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- Record sourced from PubMed, PMID 41043245.
- Also identified by DOI 10.1021/acsnano.5c12343.
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Abstract
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<sub>3</sub> perovskite nanocrystals (CsSnI<sub>3</sub>@silica NCs) via a simple solid-state calcination method. The silica-confined structure endows CsSnI<sub>3</sub>@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<sub>3</sub>@silica NCs compared to unconfined CsSnI<sub>3</sub> powders and commercial graphene IR-PTM. A noncontact NIR light communication system is designed by combining CsSnI<sub>3</sub>@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<sub>3</sub>@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.