Large scale PV (Photovoltaic) energy production needs large-area solar-cell installations. Thin-film solar cell deposition on soda-lime glass, stainless steel, or polyamide substrates is a cheap technology, which would make these solar cells truly lightweight and large area. The benefits electrodeposition can provide are convenient and inexpensive production of large-area solar cells, utilizing a technology readily adaptable to industrial production.

The report presents a new modified approach to the thermodynamics and kinetics constituent of the electrodeposition mechanism of CuInSe₂. It will be shown that the mechanism CuInSe₂ phase formation goes through a number of consecutive reactions. The formation of Cu + Se phases precedes the assimilation of indium and CuInSe₂ compound formation. Under the conditions of electrodeposition all three elements in the one-step electrochemical deposition process, the formation of Cu+Se phases are controlled by the diffusion of selenium and copper species, the insertion of indium into the film depends on the applied potential.

The report describes developed associated model used to determine the fluxes of copper, indium and selenium species to the cathode and relative concentrations of deposited solid phases. The results of computations enabled us to build the distribution diagram of the final products.

It will be shown that the morphology of electrodeposited films is determined by the nucleation rate of crystals (is the function of overpotential) and the rate of mass transport of solute species.

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