National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
The control of heat treatment temperature plays a key role towards understanding the effect of different temperatures on the optical, photo responsive, electrical conductivity and mechanical properties of noble metal/semiconductor composite thin films. This work reports on the electrical conductivity, photo electrochemical, and mechanical properties of silver nanoparticles/titanium dioxide (Ag-NP/TiO2) composite thin films, successfully synthesized. Respective precursor solutions for Ag-nanoparticles and titania were prepared from Ag salt and a titanium complex using the molecular precursor method (MPM), spin-coated on quartz glass substrates and heat treated at different temperatures, namely; 250, 300, 400, 500, 600, 700 and 800 °C. The electrical resistivity of the films was of the order of 9.6×1000 to 10–4 Ω·cm with film thicknesses in the range 100–270 nm. For the study of electrochemical properties of the Ag-NP/TiO2 composite thin films, the photocurrent was measured under natural potential by a conventional three-electrode method using a silver (Ag) plate as a counter electrode. Under Vis-light irradiation, the cathodic photocurrent density of these films increased with an increase in the heat treatment temperature. The mechanical strength of quartz glass, and Ag-NP/TiO2 thin films whose heat treated at higher temperature (500, 600, and 700ºC) were examined in order to check their potential use in practical systems as solar cells. The results illustrated that there is a distinctive decrease of Young`s modulus and Knoop hardness values with an increasing of heat treatment temperature.
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