Abstract
A new ternary compound, HgBrI, having a variable, large bandgap was investigated using different nondestructive methods. The homogeneity of the crystal composition along the growth axis was given from absorption edge measurements performed on different parts of the crystals using classical optical measurements. The atomic composition was determined by x-ray energy dispersive spectroscopy. Based on photoluminescence and reflection measurements using Confocal Scanning Laser Microscopy, the exact position and dimensions of the inhomogeneity regions were established.