Contacts charge transport and additional noise properties of semiconductor CdTe sensors

Contact quality analysis of Cadmium-Telluride detector has been conducted. IV characteristics at operating temperatures T = 305 K, 315 K, 325 K were measured. Results showed asymmetry of IV characteristics for negative and positive bias indicated by increased leakage current in case of negative biasing. Noise contributions of contacts were evaluated. Reverse biased contact in negative was found as dominant source of low frequency noise.