Argon 1 Band gap energy 1 Carrier gas 1 Copper 1 CuI thin films Deposition 1 Deposition methods 1 Deposition process 1 Dye-Sensitized solar cell 1 Energy gap 1 Inorganic compounds 1 Mesoporous matrix 1 Nano-structured 1 P-type 1 Precursor concentration 1 Solution concentration 1 Substrate temperature 1 Thin films 1 TiO 1 Titanium dioxide 1 Vapor deposition 1 XRD 1