Growth of ultra-high purity PbI2 single crystal: (1) Preparation of high purity PbI2

摘要

In order to prepare high purity lead iodide (PbI2) single crystals, the starting material-iodine (1) has been purified by the sublimation method, and the PbI2 polycrystalline by the normal freezing method. The purification effect of these methods has been confirmed by evaluating the impurity concentration in ingot by glow discharge mass spectrometry (GDMS) analysis. By comparing the purity of three different starting materials, non-purified iodine+6N-Pb, purified iodine+6N-Pb and commercial 6N-PbI2, PbI2 synthesized by purified iodine in the present experiment has the highest purity. This indicates that these purification methods are suitable. The present research results are expected to prepare high-resistivity PbI2 used in radiation detector. (c) 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.