Abstract
In this study we report on the results of the investigation of lead iodide material properties. The effectiveness of a zone refining purification method on the material purity is determined by ICP-MS and ICP-OES and correlated to the electrical and physical material properties. We show that this zone refining method is very efficient in removing impurities from lead iodide, and we also determine the segregation coefficient for some of these impurities. Triple axis x-ray diffraction (TAD) analysis has been used to determine the crystalline perfection of the lead iodide after applying various cutting, etching and fabrication methods. The soft lead iodide crystal was found to be damaged when cleaved by a razor blade, but by using a diamond wheel saw, followed by etching, the crystallinity of the material was much improved, as observed by TAD. Low temperature photoluminescence also indicates an improvement in the material properties of the purified lead iodide. Electrical properties of lead iodide such as carrier mobility, were calculated based on carrier - phonon scattering. The results for the electrical properties were in good agreement with the experimental data.
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We gratefully acknowledgment the support of the U.S. Department of Energy.
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Hermon, H., James, R.B., Lund, J. et al. Lead Iodide X-Ray and Gamma-Ray Spectrometers for Room and High Temperature Operation. MRS Online Proceedings Library 487, 361–368 (1997). https://doi.org/10.1557/PROC-487-361
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DOI: https://doi.org/10.1557/PROC-487-361