Luminescence enhancement in LaPO4:Ce/CdTe nanocomposite scintillators

Jigang Wang; Ryan Hall; Lun Ma; Wei Chen; Renfei Feng; Ramaswami Sammynaiken; Yongsheng Wang; Dawei He

doi:10.1117/12.2015879

3 June 2013 Luminescence enhancement in LaPO₄:Ce/CdTe nanocomposite scintillators

Jigang Wang, Ryan Hall, Lun Ma, Wei Chen, Renfei Feng, Ramaswami Sammynaiken, Yongsheng Wang, Dawei He

Proceedings Volume 8725, Micro- and Nanotechnology Sensors, Systems, and Applications V; 87251Y (2013) https://doi.org/10.1117/12.2015879
Event: SPIE Defense, Security, and Sensing, 2013, Baltimore, Maryland, United States

Abstract

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.

Citation Download Citation

Jigang Wang, Ryan Hall, Lun Ma, Wei Chen, Renfei Feng, Ramaswami Sammynaiken, Yongsheng Wang, and 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); https://doi.org/10.1117/12.2015879

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