Zinchenko V. Synthesis, nature of conductivity and optical properties of the complex chalcogenides and systems some of s-,p-, d-, f-metals

Object of investigation: complex chalcogenides, quasibinary chalcogenide and chalcogenide- halogenide systems. Goal of investigation: establishment of correlation between thermal stability, nature of conductivity and optical properties of the complex s-, p-, d-, f-metals chalcogenides for optimization of composition and creation of the bases of the directed synthesis of the materials for polyfunctional purposes. Methods of investigation and equipment: diffuse reflection spectroscopy, vibration spectroscopy, differential thermal and x-ray analysis, high-temperature conductometry, and ion transfer and electrochemical methods. Theoretical results and novelty: new methods of synthesis of the complex chalcogenides in the melts with conductometric control have been developed. General rules of effect of the cation and anion substitution in the complex chalcogenides on their nature of conductivity and width of transparence range were clarified. Correlation between thermal stability, parameters of ion-electron conductivity and the intervals of this range has been found. Practical results and novelty: the possibility of application of the new methods of synthesis of the complex chalcogenides and their application in the IR optics and electronics was shown. Subject and degree of application: complex chalcogenides as filmforming materials were launched. Sphere (domain) of application: optics techniques, science works in the SII of NAS of Ukraine.