Optical and structural properties of the $GaS_xSe_{1-x}$, GaSe, $TIGaSe_2$ and $TIInS_2$ semiconductors

Özet

In the present work, crystal structure and optical properties of the layered chalcogenides $GaS_xSe_{1-x}$, GaSe, $TIGaSe_2$ and $TIInS_2$ were investigated in the visible (VIS) and infrared (IR) range of spectra. Partial content of the elements were performed and the space group were determined by help of X-ray diffraction experiments. Making use of the experimental results, we have constructed a scheme of band motion for the transition from GaSe to GaS. It has been established that that the infrared active optical modes show typical two-mode behaviour.