Electrical, optical and structural properties of lead iodide
Electrical, optical and structural properties of lead iodide
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碘化铅的电学、光学和结构特性
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
D. Alexiev
中科院分区：
文献类型：
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作者：
M. Matuchová;K. Žďánský;J. Zavadil;A. Danilewsky;J. Maixner;D. Alexiev
碘化铅PbI_2是一种很好的室温高效探测器材料，可用于1 keV-1 MeV的中能区。它可广泛应用于医学、生态监测、无损探伤、X射线和伽马能谱等领域。这种材料的特点是高电阻率、能够在广泛的温度范围内工作和高化学稳定性。其制备方法是由铅和碘直接合成。通过区域熔融进一步纯化材料，并通过Bridgman-Stockbarger方法生长。在这项工作中，我们集中研究了掺杂剂，如镧系元素（Er，Gd，Ho，Tb，Tm，Yb，GdI 3，HoI 3，GdI 3）和其他组的元素，如Au，Ag，Ge对PbI 2的物理，电学和光学性质的影响。这些进行了评价电阻率和低温光致发光测量。同步辐射X射线形貌术被成功地用于研究缺陷。在合成、区熔和生长之后分析材料的质量。研究了掺杂浓度对薄膜性能的影响。
Lead iodide PbI2 is an excellent and interesting candidate for high efficiency room temperature detectors working in the medium energy range of 1 keV–1 MeV. It can be widely applied in medicine, monitoring ecology, nondestructive defectoscopy and X-ray and gamma spectroscopy. The peculiarities of this material are high resistivity, ability to work in a wide range of temperatures and high chemical stability. The method of preparation was direct synthesis from lead and iodine. The material was further purified by zone melting and grown by Bridgman-Stockbarger method. In this work we have concentrated on the study of the influence of dopants such as lanthanides (Er,Gd, Ho, Tb, Tm, Yb, GdI3, HoI3, GdI3) and elements of other groups, such as Au, Ag, Ge on the physical, electrical and optical properties of the PbI2. These were evaluated by resistivity and low temperature photoluminescence measurements. The Synchrotron X-ray topography was successfully introduced to study defects. The quality of the material was analyzed after synthesis, zone melting and growth. The dependence on the concentration of dopants was investigated too.