Crystal growth of CdTe in a multi-zone vertical Bridgman furnace with a PBN crucible

Single crystal CdTe growth in a multi-zone vertical Bridgman furnace is reported. The furnace could produce any temperature profile between 26 and 0°C/cm on a programmed time schedule. The sticking mechanism of the grown ingot to the quartz ampoule was studied using XPS. It was found that TeO 2 formed on the source material caused the adhesion. A treatment of the source material to avoid adhesion has been found. Crystal growth in a pyrolytic boron nitride crucible has also been examined and promising results for the growth of high quality crystal were obtained.