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arXiv · 2508.08631

Thermal imaging by utilization of CsPbBr3 quantum dot photoluminescence

Alireza Jalouli·Nathan Giannini-Hutchin·Alexander R. Albrecht
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Abstract

The temperature-dependent photoluminescence of perovskite quantum dots (CsPbBr3) in the visible band, is analyzed to evaluate their suitability for use in thermometry. A differential measurement of the photoluminescence can be used to estimate the surface temperature. Thermal imaging is demonstrated by using the Bayer-pattern of a cost-effective consumer-grade digital camera to determine the spectral shift. The temperature change of traces on a printed circuit board are visualized as proof of principle. This technique promises a novel approach for thermal imaging of arbitrary samples with optical resolution (wavelength of ~ 500 nm), instead of typical black-body wavelengths (~ 10 micrometer). Premature degradation of the quantum dots has been mitigated by embedding them in a poly-methyl methacrylate (PMMA) film, which can then be applied to arbitrary surfaces.

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Alireza Jalouli, Nathan Giannini-Hutchin, Alexander R. Albrecht. 2025-08-12. Thermal imaging by utilization of CsPbBr3 quantum dot photoluminescence. https://arxiv.org/abs/2508.08631

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