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Abstract
In the present investigation, we report facile hydrothermal synthesis of TiO2 nanorods with high density rutile phase on Transparent Conducting Oxide (TCO) for enhanced solar cell application. The structural, optical, morphological, compositional and electrochemical properties are investigated by detailed XRD, UV-Vis-NIR spectrophotometer, FESEM, TEM, EDAX, XPS and photoelectrochemical studies. It is demonstrated that, the deposited TiO2 thin film shows pure rutile phase with tetragonal crystal structure. Optical spectra showed strong light absorption in UV region and FESEM images confirm the time dependent growth of TiO2 nanorods. EDAX and XPS Spectra confirm the formation of pure TiO2 nanorods. Photoelectrochemical performance with respect to time dependent growth of TiO2 nanorods showed highest photoconversion efficiency E³ = 5.1%
Highlights
Searching of alternative energy source is a vital issue in the modern civilization for many reasons which include depletion of conventional energy sources like coal, oil, natural gas etc. and burning of these energy fuels leading to a global air pollution problem
The Fluorine doped tin oxide (FTO) substrates were used for the growth of 3D nanostructures, because due to the lattice mismatch bare glass substrates have been unsuccessful for this purpose
We have successfully demonstrated a simple and low cost synthesis method for TiO2 thin films having well aligned nanorod morphology using single step hydrothermal synthesis
Summary
Searching of alternative energy source is a vital issue in the modern civilization for many reasons which include depletion of conventional energy sources like coal, oil, natural gas etc. and burning of these energy fuels leading to a global air pollution problem. TiO2 is a wide band gap (3.2 eV) transition metal oxide (TMO) semiconductor has received increasing attention due to its unique properties such as high chemical stability, high refractive index, optical transparency in UV and visible range, semiconducting behavior, photocatalytic activities, high PEC efficiency, biocompatibility, long term photostability, non-toxicity and low cost etc [1,2,3,4,5] Because of all these properties TiO2 become a common multifunctional material used in variety of applications in many fields such as dye sensitized solar cells [6], energy storage, gas sensors and biosensors [7], photocatalytic water splitting [8], photodegradation of organic pollutants, hydrogen generation [9,10], self-cleaning coatings [11], supercapacitors [12], electronic components [13], chemical catalysis [14], glass and ceramics [15], paintings, medicines, bactericides [16], cancer therapy [17] etc. In particular due to their higher surface to volume ratio, TiO2 nanomaterials demonstrate high performance levels for these applications compared to their bulk form
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