Effect of sulfur partial pressure on the growth of CuInS2 single crystals

摘要

CuInS$-2$/ single crystals of moderate size have been produced by the gradient freeze technique under different sulfur pressures. Results from EDX show that with higher sulfur pressures the cracking along the ingot decreases, but at 2 bar these cracks are still present. XRD shows that CuS is present at these cracks and is due to the loss of In$-2$/S into the gas phase. Despite this loss of In$-2$/S PL reveals the material to be In rich.