Investigations on synthesis, growth, electrical and defect studies of lithium selenoindate single crystals

High purity LiInSe2 polycrystalline material was synthesized successfully using MTOM. Crack free LiInSe2 single crystals of size 12 mm diameter and 32 mm length were grown using a steady ampoule rotation by modified vertical Bridgman-Stockbarger method. The orientation of the as grown LiInSe2 single crystal is obtained to be 〈231〉 direction. The grown single crystal's composition Li0.81In1.01Se2.18 was determined from ICP-OES analysis. Positron lifetime measurements on LiInSe2 crystals indicate the strong presence of vacancy defects. N-type semiconducting nature and high resistivity was observed from Hall effect measurements.