Dual‐Mode Optical Thermometers Based on the Thermal‐Stable Perovskite Nanocrystals Embedded in Robust Metal Halide Salts
Abstract Photothermal sensing is crucial for the creation of smart integrated devices. All‐inorganic metal halide perovskites with the formula CsPbX3 (X═Cl, Br, I) have excellent photo‐physical performance, offering exciting opportunities for flexible electronics. Hence, a supersaturated precipitati...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley-VCH
2025-02-01
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| Series: | Advanced Physics Research |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/apxr.202400099 |
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| Summary: | Abstract Photothermal sensing is crucial for the creation of smart integrated devices. All‐inorganic metal halide perovskites with the formula CsPbX3 (X═Cl, Br, I) have excellent photo‐physical performance, offering exciting opportunities for flexible electronics. Hence, a supersaturated precipitation strategy is proposed for the preparation of salt‐shelled metal halide solids. The well‐designed CsPbX3@MX (M═K, Cs) products exhibit bright narrow visible emissions and favorable thermal stability up to 195 °C. Co‐doping with Ni2+ and Mn2+ ions, the CsPbCl3@KCl products have realized dual‐mode thermometry. Utilizing the blue emission from the CsPbCl3 host and the red emission from the Mn2+ ion, a fluorescence intensity ratio technique is obtained to monitor the temperature of good stability and repeatability. Based on the regular fluorescence decay of Mn2+ ions with rising temperature, the lifetime of Mn2+ ions can also be used for temperature sensing. It is believed that such stable metal halides with dual‐mode thermometry will provide a new sight for optical thermometers and, more importantly, will unleash the possibility of a broad variety of applications in lightweight and integrated functional devices. |
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| ISSN: | 2751-1200 |