【摘要】 CdZnTe晶体是一种性能优异的室温核辐射探测器材料。在熔体法生长CdZnTe晶体的过程中,生长炉的内部温场分布对获得的晶体结构和性能有很大影响。根据CdZnTe晶体的生长习性,设计了三温区单晶炉,用坩埚下降法生长出CdZnTe单晶体。通过X射线衍射、红外透过率、I-V测试等分析研究,得到了红外透过率约为61%,腐蚀蚀坑密度(EPD)为104cm-2,电阻率为109~1010Ω.cm的Cd0.9Zn0.1Te单晶体。表明三温区坩埚下降法生长的单晶体结晶质量好、成分分布均匀、EPD低、红外透过性能好且电阻率高。更多还原

【Abstract】 Cadmium Zinc Telluride(CZT) crystal is a room temperature nuclear radiation detector material with excellent properties.During the growth of CZT crystal,the temperature distribution of the furnace is very important for the structure and performance of the crystal.According to the attributes of CZT growth,Three-temperature-zone furnace was designed to grow CZT single crystal.The as-grown crystal was characterized by using X-ray diffraction,IR transmission microscopy,etch pit density(EPD) and electric property measurement.It was found that the transmission of the crystal was up to 61% in the range from 4000 to 500cm-1,EPD was about 104cm-2,and the resistivity was 109-1010Ω·cm.The results showed that the three-temperature-zone method is efficient for the growth of high quality CZT crystal for room nuclear radiation detector.更多还原