The effect of the thermal introduction of NaNO2 on the optical properties of indium and gallium monoselenides was investigated. The transmission spectra of InSe and GaSe and their NaNO2-intercalates were identified by means of the installation spectrometric collected on the basis of monochromator MDR-23. It was found that the time dependence of the concentration of NaNO2-intercalates has the non-monotonic character with areas of different intercalation speeds.
Structural, optical, and electrical properties of InSe and GaSe single crystals diffusely intercalated with ethanol have been studied. The X-ray analysis confirmed that ethanol molecules become introduced into the interlayer space of samples. The dependences of the energy position of the main exciton maximum and a half-width of the excitonic absorption band on the holding time of InSe and GaSe single crystals in ethanol are found to be non-monotonous. The temperature dependences of the conductivity, concentration, and mobility of electrons along the layers in InSe are obtained. The change in the conductivity of InSe crystals intercalated with ethanol and its dependence on the holding time are explained by the formation of new levels in the energy gap and the influence of intercalated alcohol molecules on the deformation potential in a crystal. K e y w o r d s: InSe and GaSe single crystals, intercalation.
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