Document Details

Document Type : Article In Journal 
Document Title :
Electrical and optical properties of platinum doped titanium dioxide nanoparticle: improved performance in dye sensitized solar cells
Electrical and optical properties of platinum doped titanium dioxide nanoparticle: improved performance in dye sensitized solar cells
 
Subject : physics 
Document Language : English 
Abstract : The undoped and doped TiO2 particles with different concentrations of Pt (1-6%) were synthesized by a simple hydrothermal method. The resulting material was further characterized by standard analytical techniques such as x-ray diffraction (XRD), scanning electron microscopy (SEM), and UV-vis spectroscopy. The XRD analysis showed no change in crystal structure of TiO2 after doping with different concentration of Pt, confirming anatase phase of TiO2. The electrical analysis showed that the dielectric constant (epsilon') and dielectric loss tangent (tan delta) had decrement trend with increase in frequency. The dielectric property was found to decrease with increase in dopant concentration. At low frequency, the mechanism of a.c. conductivity was found to be same as that of d.c. conduction. With increase in frequency, the magnitude of complex impedance was found to decrease indicating the increase in a.c conductivity. Dopant concentration was also found to increase with corresponding increase in the value of impedance. Under simulated solar illumination, the amount of dye absorption was found to increase with the increase in optimum content of Pt, resulting in the gradual increase in photovoltaic current, this could be contributed to the improvement in the cell efficiency from 6.45 to 7.62%. 
ISSN : 1454-4164 
Journal Name : JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS 
Volume : 17 
Issue Number : 5-6 
Publishing Year : 1435 AH
2015 AD 
Article Type : Article 
Added Date : Monday, August 21, 2017 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
Omar A Al-HartomyAl-Hartomy, Omar A InvestigatorDoctorateoalhartomy@hotmail.co.uk

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