Optimal passivation process for improved spectroscopic grade CdMnTeSe single crystals based on chromic acid
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This study explores the effects of novel H2CrO4-based passivant on Cd0.95Mn0.05Te0.98Se0.02 (CMTS) detectors. Optimal passivation for 3 min improved spectroscopic performance by addressing surface defects. However, longer passivation led to degradation due to Cr-invasion, as shown by XPS analysis. The use of a virtual Frisch grid further enhanced energy resolution, highlighting the potential of CMTS detectors for high-energy gamma spectroscopy. These findings emphasize the importance of precise passivation control and suggest that improved CMTS fabrication and passivation techniques could advance the development of cost-effective, larger volume CdTe-based detectors for room temperature applications
Abstract
This study explores the effects of novel H2CrO4-based passivant on Cd0.95Mn0.05Te0.98Se0.02 (CMTS) detectors. Optimal passivation for 3 min improved spectroscopic performance by addressing surface defects. However, longer passivation led to degradation due to Cr-invasion, as shown by XPS analysis. The use of a virtual Frisch grid further enhanced energy resolution, highlighting the potential of CMTS detectors for high-energy gamma spectroscopy. These findings emphasize the importance of precise passivation control and suggest that improved CMTS fabrication and passivation techniques could advance the development of cost-effective, larger volume CdTe-based detectors for room temperature applications