Solution-Processed Metal Halide Perovskites for Nuclear Radiation detection
Yadong Xu a b
a Key Laboratory of Radiation Detection Materials and Devices,
b State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China
nanoGe Fall Meeting
Proceedings of nanoGe Fall Meeting19 (NGFM19)
#RadDet19. Radiation Detection Semiconductors Materials, Physics and Devices
Berlin, Germany, 2019 November 3rd - 8th
Organizers: Mahshid Ahmadi and Germà Garcia-Belmonte
Poster, Yadong Xu, 355
Publication date: 16th July 2019

The recent rapid demand for large-volume X-ray and γ-ray spectrometers and imaging arrays have triggered tremendous opportunities in the field of astronomy and high energy physics, nuclear medicine, industrial on-line monitoring, and national security. The large mobility and carrier lifetime of perovskite single crystals and the high atomic numbers of Pb, I and Br make them ideal for X-ray and γ-ray detection. Here, we report centimeter-sized detector-grade APbBr3 (A=Methylammonium, Cs) perovskite crystals grown using solution method. The resulting single crystals exhibited high X-ray sensitivity and mobility lifetime products (μτ). In addition, we demonstrate a potential candidate the 0-D perovskite material Cs2TeI6 grown by electrostatic assisted spray (E-spray) deposition, as a sensitive all-inorganic X-ray photoconductor for direct photon-to-current conversion X-Ray detectors. The electrospray apparatus can be readily automated and fully integrated with the existing display systems based on TFT or CMOS, which will help to implement and scale up this device for manufacturing next generation of flat panel X-ray imagers.

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