Transmission spectra of copper, aluminum and chalcopyrite – based thin nanostructured films prepared by gas discharge technique
DOI:
https://doi.org/10.24144/2415-8038.2019.46.84-91Keywords:
Transmission spectra, Copper nanostructures, Copper and aluminum oxide nanostructures, Chalcopyrite nanostructures, Air, ArgonAbstract
Purpose. At present, alloys of СuIn(Sb)S2(Se2) from chalcopyrite class are perspective materials for solar cells batteries. This is caused by their high absorption coefficient in a wide spectral region as well as high light resistivity of layer coverings. Laser sputtering permit (allow) to obtain stoichiometric thin films of chalcopyrite but the yield of largearea covering is low, and a process of their fabrication is expansive due to high cost of laser and vacuum technique used. Reasonable, exploiting of simpler gas-discharge techniques of chalcopyrite synthesis for photovoltaic solar cells convertors is actual and important. At the same time, optical characteristics of chalcopyrite layers synthesized from over-constrained plasma are not considered. Results of optical absorption spectra for СuInSe2 layers at glass (quarts) substrate, obtained at different gas ambient pressure of over-constrained nanosecond plasma discharge.
Methods. Methods and technique for thin films-based coper oxides, aluminum and chalcopyrite Nanostructures obtained in air and inert gases are considered in details for ecotone mechanism of sputtering are considered. For these samples optical transmit ion were investigated in 200 – 800 nm range.
Results. Transmission spectra for samples on glass substrates in 200 – 500 and 350 – 800nm, correspondingly, were obtained. Gas ambient – air and argon – at 1 atm pressure for all electrode materials. Layers were obtained by abovementioned technique. We start to register transmition for wave-lengths above 300 nm. For copper-based films sputtered in argon observed maximal transmition. Probably this is nanostructured coper films. Minimal transmition is inherent for aluminum- and chalcopyrite films. The strong absorption of light by chalcopyrite films in the region of 200-800 nm indicates that when the films of chalcopyrite are sprayed with a gas-discharge method, they repeat the stoichiometry of the chalcopyrite electrodes.
Conclusions. Pulsed gas-discharge method for copper film preparation is vividly perspective for transparent electrodes applications. Films of chalcopyrite are characterized by strong absorption in the range of the spectrum of 200 – 800 nm, which is promising for their applications in photovoltaics.
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