真空 ›› 2024, Vol. 61 ›› Issue (4): 17-21.doi: 10.13385/j.cnki.vacuum.2024.04.04
李瑞东1, 金大利2, 张梅东1, 于立苹3, 王建伟4
LI Rui-dong1, JIN Da-li2, ZHANG Mei-dong1, YU Li-ping3, WANG Jian-wei4
摘要： 非晶态硒（α-Se）属于无机弱电导材料,被认为是X射线医学成像和无损检测方面最有前途的探测材料之一,其载流子特性对应用至关重要。本文在恒温条件下制备了非晶态硒本征薄膜,利用SEM、XRD测试了薄膜的微观形貌和晶体结构,利用渡越时间（TOF）方法研究了温度、取样电阻及光脉冲能量对载流子迁移率的影响。结果表明：在298~338K的温度范围内,非晶硒的载流子输运规律符合浅陷阱模型;取样电阻不大于5 kΩ,光脉冲能量不大于3.5 μJ时,载流子渡越时间保持恒定,测试结果可靠。
中图分类号: O484.3
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