Thermal conductivity studies of CdZnTe with varying Te excess

摘要: Cadmium Zine Telluride (CZT) has been extensively studied as a room temperature semiconductor gamma radiation detector. CZT continues to show promise bulk and pixelated gamma spectrometer with less than one percent energy resolution; however the fabrication costs are high. Improved yields of high quality, large CZT spectroscopy grade crystals must be achieved. is grown by Traveling Heater Method (THM) Te overpressure account for vaporization losses. This procedure creates Te rich zones. During growth, boules will often cleave limiting number harvestable crystals. As result, crystal growth parameter optimization was evaluated by modeling heat flow within system. Interestingly, (CdTe) used thermal conductivity surrogate in absence thorough study properties. The current measured thermal conductivity pressed powders varying concentrations from 50-100% over 25-800°C understand the variation this CdTe. Cd0.9Zn0.1Te1.0 base (designated 50%). exhibits nearly 1 W/mK, an order magnitude greater Further, conductivity decreased with increasing concentration.