Radiation sensor based on thin-film CdTe/CdS device structure and its radiation resistance under high-intensity hydrogen plasma
JOURNAL OF APPLIED PHYSICS(2022)
摘要
In this work, the ability of CdTe/CdS thin-film device structures prepared by the hot-wall method to detect ionizing radiation was investigated. The samples were fabricated with a structure typical of CdTe/CdS-based solar cells and exhibit radiation sensitivity even without the application of an external voltage. This allows such structures to be used as low-voltage radiation sensors. An investigation of the radiation resistance of the structures, namely, the effect of irradiation with high-intensity hydrogen plasma H-2(+) on the crystal structure and performance, was carried out. It was shown that the device structures remained operational after two plasma pulses at an ion density of 2 x 10(23) m(-2) and an energy density of up to 0.2 MJ/m(2). With further exposure to plasma, the device structures deteriorated, first, due to gradual sputtering off of the back contact, and, second, as a result of diffusion processes that occurred when the structures were heated to high temperatures, due to which the entire volume of the CdTe base layer got converted into a CdSxTe1-x solid solution.
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关键词
cdte/cds device structure,radiation resistance,plasma,thin-film,high-intensity
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