Blue-Band Emission of LiInS 2 Single Crystals Grown by the Indium Solution Method

It is demonstrated that the undoped and Zn-doped LiInS 2 single crystals are grown using indium solution technique. The optimum weight ratio between the starting materials (LiIn and S) and In solvent was found to be 1:3. The photoluminescence (PL) emissions in the blue-band region were observed for undoped and Zn-doped crystals. It is proposed that in addition to the donor-valence-band transitions related to the native defects (V s and In Li ) in undoped crystals, the PL emission of Zn-doped crystal consists of a multiple transition related to the intentionally introduced impurity, Zn Li , which act as a donor.