By low-temperature annealing of n-CdTe substrates in aqueous suspensions of LiNO3 and Ca(NO3)2 salts pconductivity layers are created. The estimated concentration of free holes in diffusion layers at 300K is  (5-50)∙1015 см-3

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A modified surface on -ZnSe heterolayers was prepared by chemical treatment in H2SO4:H2O2 etchant. Visual observation with microscope magnification 150 × and AFM-topograms made it possible to determine the geometrical surface structure which is composed of nanocrystals-pyramids of various size from 20 to 100 nm. Photoluminescence studies revealed high quantum efficiency   15 ÷ 20 % and two radiation spectrum components. In the range of photon energies ħ  Eg (Eg  2.89 eV at 300 K) the wide band with a maximum at ħm  3.24 eV is attributable to quantum size effects. The component at ħm  2.72 eV is formed by radiation on pyramids of large size and determined by interband transitions of free charge carriers and the dominant annihilation of bound excitons. The properties are characterized by temporal and temperature stabilities.

The prospects for the use of molten ZnSe crystals after their additional doping with rareearth elements to create hyperspectral optical elements with elevated temperature and radiation resistance are discussed.

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