Surface preparation is an important step in the fabrication process of metal/semiconductor/metal (MSM) Cd1−xZnxTe and Cd1−xMnxTe room-temperature radiation detectors. The quality of metal/semiconductor interface significantly affects the device's performance both, static and dynamic. In this work, we present a comprehensive correlation starting from surface preparation technique to chemical surface composition, through surface potential, and eventually to current–voltage dependence (I-V). We also compare this correlation between Cd1−xZnxTe and Cd1−xMnxTe. It was found that cadmium-rich surfaces lead to low surface potential and sub-linear I-V curves, whereas tellurium rich or stoichiometric surfaces yield higher surface potential.
|Journal||Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment|
|State||Published - 21 Mar 2020|