Project objectives:
The aim of this projectb was to establish the optimal growth regimes of homogeneous compounds of CZGeS, CCdGeS and solid solutions CZCdGeS, as well as detailed research of their fundamental properties, with the establishment of the correlation between them and the technological conditions of obtaining.
To achieve this, the following objectives have been set:
1. Drawing the state diagram of the system Сu₂ZnGeS₄ - Cu₂CdGeS₄ and determining the optimal regimes for synthesis and growth of crystals of solid solutions Cu₂Zn_xCd_1-xGeS₄ by the method of oriented crystallization (Bridgman method) and gas phase (chemical transport method).
2. Determination of the composition, structure and mechanical properties of Cu₂ZnGeS₄, Сu₂CdGeS₄ and Cu₂Zn_xCd_1-xGeS₄ solid solutions.
3. Study of the transmission, photoluminescence and vibrational spectra of Cu₂Zn_xCd_1-xGeS₄ series compounds.
4. Determining the legality of changing the parameters of the elementary cell, the density, the micro-hardness and the width of the forbidden band of the compounds synthesized by the composition x.
5. Detailed study of the transport properties of crystals obtained over a wide range of temperatures and in the presence of the magnetic field.