Selenophosphate Pb 2 P 2 Se 6 Single Crystals Growth by Chemical Vapor Transport (CVT) Method for Radiation Detection.

Autor: Ji L; State Key Laboratory of Solidification Processing & Key Laboratory of Radiation Detection Materials and Devices, Ministry of Industry and Information Technology, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China., Yin Z; State Key Laboratory of Solidification Processing & Key Laboratory of Radiation Detection Materials and Devices, Ministry of Industry and Information Technology, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China., Xiao B; State Key Laboratory of Radiation Medicine and Protection, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, and School for Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, Suzhou, 215123, China., Ge B; State Key Laboratory of Solidification Processing & Key Laboratory of Radiation Detection Materials and Devices, Ministry of Industry and Information Technology, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China., Xu Y; State Key Laboratory of Solidification Processing & Key Laboratory of Radiation Detection Materials and Devices, Ministry of Industry and Information Technology, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China., Jie W; State Key Laboratory of Solidification Processing & Key Laboratory of Radiation Detection Materials and Devices, Ministry of Industry and Information Technology, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China.
Jazyk: angličtina
Zdroj: Chemphyschem : a European journal of chemical physics and physical chemistry [Chemphyschem] 2024 Oct 01; Vol. 25 (19), pp. e202400149. Date of Electronic Publication: 2024 Sep 09.
DOI: 10.1002/cphc.202400149
Abstrakt: The heavy metal selenophosphate Pb 2 P 2 Se 6 emerges as a promising room-temperature X-ray/γ-ray detectors due to its high resistivity, robust radiation-blocking capability, and outstanding carrier mobility-lifetime product, etc. However, the high activity of phosphides poses significant impediment to the synthesis and single crystal growth. In this work, we have prepared high-quality Pb 2 P 2 Se 6 single crystals with using the chemical vapor transport (CVT) method. The XRD analysis combined with EDS result confirmed the uniform composition of the resulting as-grown single crystals, while UV-Vis-NIR transmittance spectra revealed the bandgap of 1.89 eV. Selected area electron diffraction patterns indicated the crystal belonged to the P2 1 /c(14) space group. Additionally, the Au/Pb 2 P 2 Se 6 /Au device is fabricated, which exhibits a robust X-ray response with a sensitivity of 648.61 μC Gy -1  cm -2 at 400 V mm -1 under 50 kVp. Notably, the device also excels in alpha particle detection, boasting a resolution of ~14.48 % under a bias of 400 V bias. The hole mobility-lifetime product (μτ) h of Pb 2 P 2 Se 6 is estimated to be ~2.58×10 -5  cm 2  V -1 . The results underscore potential applications of Pb 2 P 2 Se 6 crystal is in the field of the semiconductor radiation detectors.
(© 2024 Wiley-VCH GmbH.)
Databáze: MEDLINE
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