Cadmium sulfide thin films for flexible solar cell received by magnetron dispersion method

Abstract

For the purpose of creation of the economic, suitable for large-scale application technology of formation of a layer of wide-scale "window", for thin-film photo-electric converters on the basis of sulfide and telluride of cadmium the pilot studies of temperature effect of a deposition of the films of sulfide of cadmium received by method of magnetron dispersion on a direct current on their optical properties and crystalline structure were conducted. By method of a two-channel optical spectroscopy it is established that a deposition of films of sulfide of cadmium at a temperature of 160 °C allows to form layers with a width of forbidden region of 1,41 eV that approaches value, characteristic of monocrystals, a nd the density of the photon flux passing through a cadmium sulfide layer in a spectral interval of a photosensitivity of telluride of cadmium at the level of 37,0 W·nm·cm2. Body height of precipitation temperature to 160 °C leads to decrease in optical losses in cadmium sulfide films, as a result of increase in the sizes of areas of a coherent scattering and decrease of level of macrodeformations. At further increase of precipitation temperature up to 230 °C the defining factor leading to growth of optical losses in cadmium sulfide films becomes their imp overishment by an easily volatile component – sulfur.