16 September 2005 Nuclear spectroscopy with polycrystalline-PbI2 radiation detectors
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Abstract
Polycrystalline PbI2 films were deposited by Physical Vapor Deposition on ITO and gold coated glass substrates. The structural characterization of the samples was studied by using X-ray diffraction and Scanning Electron Microscopy. Two different preferred orientations - [00l] and [110] directions were found as a function of substrate temperatures, and type of substrate (ITO or Gold). The [110] direction is perpendicular to the c-axis in the hexagonal system. Four types of crystalline preferred orientations were found and named as A, B, C, and D type. The different samples were also annealed at different temperatures to improve their densities. The nuclear spectroscopic data for single crystal and polycrystalline samples were taken with 5.64 MeV Alpha particles emitted from 241Am source. The samples were also measured for their response to a blue light LED irradiation. Both polarities were studied for all samples. In most measurements it was confirmed that holes are the major carriers. The correlation between microstructure and electrical properties as affected by annealing and crystalline orientation is discussed.
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M. Schieber, M. Schieber, N. Zamoshchuk, N. Zamoshchuk, O. Khakhan, O. Khakhan, A. Zuck, A. Zuck, } "Nuclear spectroscopy with polycrystalline-PbI2 radiation detectors", Proc. SPIE 5922, Hard X-Ray and Gamma-Ray Detector Physics VII, 59220B (16 September 2005); doi: 10.1117/12.619639; https://doi.org/10.1117/12.619639
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