Sensitive detection of short wavelength radiation with spectrum down-converting nanoparticles

Darayas N. Patel; Sergey S. Sarkisov; Abdalla M. Darwish; Kelly Whyte; Sabrina Collins; Crystal Smith

doi:10.1117/12.2690307

8 March 2024 Sensitive detection of short wavelength radiation with spectrum down-converting nanoparticles

Darayas N. Patel, Sergey S. Sarkisov, Abdalla M. Darwish, Kelly Whyte, Sabrina Collins, Crystal Smith

Proceedings Volume 12882, Optical Components and Materials XXI; 128820Q (2024) https://doi.org/10.1117/12.2690307
Event: SPIE OPTO, 2024, San Francisco, California, United States

Conference Poster

Abstract

The method of sensitive detection of ultraviolet (UV) radiation using integration of Cesium-Lead-Bromide perovskitebased nanocolloids with silicon avalanche photodiodes (APDs) was investigated. The perovskite nanoparticles (NPs) were synthesized using the sonication method with a conventional ultrasonic cleaning bath. The synthesis resulted in perovskite NPs in the form supercrystals of 200-nm diameter. The NPs being pumped with a 372-nm UV laser produced visible photoluminescence (PL) with a spectral peak at 514 nm. Integration of the perovskite nanocolloid with a silicon APD resulted in the increase of APD’s sensitivity to UV by ~7.6 dB. Degradation of the response of the perovskite-APD system to pulsed UV radiation at high frequencies was thus mainly due to the time delay in the APD (100-kHz cut-off frequency) rather than relaxation of the PL. Composition, crystalline structure, and UV-excited PL of two oxysulfide phosphors doped with Terbium (Y₂O₂S:Tb and Gd₂O₂S:Tb) were investigated with the view of their potential use in combination with silicon APDs for sensitive detection of x-ray radiation. Both phosphors contained oxide impurities Y₂O₃ and Gd₂O₃, respectively, partially reducing their x-ray scintillation capability. The obtained results might be useful for the applications in the field of sensitive detection of short wavelength (UV and x-ray) radiation.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Darayas N. Patel, Sergey S. Sarkisov, Abdalla M. Darwish, Kelly Whyte, Sabrina Collins, and Crystal Smith "Sensitive detection of short wavelength radiation with spectrum down-converting nanoparticles", Proc. SPIE 12882, Optical Components and Materials XXI, 128820Q (8 March 2024); https://doi.org/10.1117/12.2690307

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