Correlations of Bridgman-Grown Cd0.9Zn0.1Te Propertieswith Different Ampoule Rotation Schemes

摘要: A unique ampoule rotation system was developed at the Center for Materials Research Washington State University enhancing convection in cadmium zinc telluride (CZT) melt by applying different schemes (RS). Experiments were performed with initial charge material concentrations and parameters (acceleration, speed, time, etc.). The applied speed acceleration ranged from 30 rpm to 50 rpm2 200 rpm2, respectively. Zinc (Zn) distribution profiles of radial axial slices same regions grown ingot determined room-temperature photoluminescence mapping. results demonstrate effects on Zn segregation growth interface evolution. most stable propagation obtained when 0.2 atomic percent (at.%) excess tellurium (Te) used along a trapezoidal RS. Uniform achieved using triangular RS, which is because flatness near axis. Comparison secondary phase (SP) generation RS Te performed. Closed-container CZT resulted high single-crystal yield lower-diameter SP last-to-freeze region. High-resistivity (on order 1010 Ω-cm) crystals all mobility–lifetime product (μτ)e electrons planar detectors found be 3 × 10−3 cm2/V 5 3.5 at.% growths.