Specialist Trainer: Ing. Robert Král, Ph.D.
Filed: DAIZ
This work is aimed at preparation, crystal growth, and characterization of new ternary alkali lead halides. These materials generally consist of alkali (AX) and lead halide (PbX2), where A = Li, …, Cs a X = Cl, Br a I, mixed together in appropriate stoichiometric ratio AX : PbX2 = 1:1, 2:1, 1:2 a 4:1. In this work, special attention will be devoted mainly to compounds with stoichiometric ratio (AX : PbX2) 1:1 and 1:2, i.e. to compounds APbX3 a APb2X5, which are studied as suitable matrices for activator doping for scintillating applications and mid infrared lasers. This work will be focused on the preparation and purification of starting raw materials, synthesis of ternary halides, and growth of their single crystals by micro-pulling-down and vertical Bridgman methods. Followed by testing of various doping concepts of these materials, e.g. by rare earth elements (Sm2+, Pr3+, Nd3+, Tb3+, Eu2+, etc.) and optimizing influence of the activator’s concentration on the final optical, luminescent, and scintillation properties. Prepared crystals will be studied concerning their composition and purity (element and phasal), measuring their physical (thermal, optical, luminescent, scintillating, etc.) properties and characterized by other techniques available at our Institute.