3 June 2013 Luminescence enhancement in LaPO4:Ce/CdTe nanocomposite scintillators
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Radiation detection demands new scintillators with high quantum efficiency, high energy resolution, and short luminescence lifetimes. Herein, we report the enhancement in the photoluminescence and x-ray luminescence from CdTe quantum dots in LaPO4:Ce/CdTe nanocomposites and their potential applications for radiation detection. The luminescence enhancement is attributed to energy transfer from LaPO4:Ce to CdTe quantum dots in the nanocomposites. LaPO4:Ce nanoparticles have a high stopping power for radiation but their emission is in the ultraviolet range that is reabsorbed in most polymer host materials. CdTe quantum dots have strong photoluminescence and size-tunable emissions but very weak scintillation emission due to their low stopping power. The combination of LaPO4:Ce nanoparticles and CdTe quantum dots takes the advantages of both materials to make a promising nanocomposite scintillator for radiation detection.
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Jigang Wang, Jigang Wang, Ryan Hall, Ryan Hall, Lun Ma, Lun Ma, Wei Chen, Wei Chen, Renfei Feng, Renfei Feng, Ramaswami Sammynaiken, Ramaswami Sammynaiken, Yongsheng Wang, Yongsheng Wang, Dawei He, Dawei He, "Luminescence enhancement in LaPO4:Ce/CdTe nanocomposite scintillators", Proc. SPIE 8725, Micro- and Nanotechnology Sensors, Systems, and Applications V, 87251Y (3 June 2013); doi: 10.1117/12.2015879; https://doi.org/10.1117/12.2015879

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