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Raj, A. Moses Ezhil
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Publications (6/6 displayed)
- 2018Low-cost and eco-friendly nebulizer spray coated CuInAlS2 counter electrode for dye-sensitized solar cellscitations
- 2018Solvent volume-driven CuInAlS2 nanoflake counter electrode for effective electrocatalytic tri-iodide reduction in dye-sensitized solar cellscitations
- 2018Analysis of optical dispersion parameters and electrochromic properties of manganese-doped Co3O4 dendrite structured thin filmscitations
- 2017CuInS2 layer deposition through nebulizer spray technique for solar cell fabricationcitations
- 2017Facile preparation of hierarchical nanostructured CuInS2 counter electrodes for dye-sensitized solar cellscitations
- 2015Facile synthesis of nanostructured monoclinic bismuth vanadate by a co-precipitation methodcitations
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article
Analysis of optical dispersion parameters and electrochromic properties of manganese-doped Co3O4 dendrite structured thin films
Abstract
<p>Nebulized spray pyrolysis method was employed to deposit pristine and manganese (Mn) -doped Co<sub>3</sub>O<sub>4</sub> thin films for different Mn concentrations (4, 6 and 8 at.%). The structural properties revealed that the obtained films show predominant orientation along (311) plane and significant peak shift was observed upon an increase in Mn doping confirms the substitution of Mn in Co<sub>3</sub>O<sub>4</sub> lattice. The pristine Co<sub>3</sub>O<sub>4</sub> film shows clustered grains and dendrite patterns appearing with the increase in Mn content as evident from SEM studies. The optical dispersion parameters of the prepared films of pristine and Mn doped Co<sub>3</sub>O<sub>4</sub> films were determined from UV transmission spectra. The phase purity and elemental analysis of the films revealed single phase with better stoichiometric films were obtained. The XPS core level spectra of 6 at.% Mn doped Co<sub>3</sub>O<sub>4</sub> films exhibited the presence of two different oxidation states (Mn<sup>2+</sup> and Mn<sup>3+</sup>). The electrical resistivity of the films decreased with increase in Mn dopant concentration was observed from linear four probe method. The Co<sub>3</sub>O<sub>4</sub> film deposited using 6 at.% of Mn exhibited a maximum optical modulation of 35% and coloration efficiency of 29 cm<sup>2</sup>/C.</p>