Effect of Temperature on Optical and Photovoltaic Properties of nc-TiO2 Thin Films for Dye Sensitized Solar Cell

M.T. Sarode; Y.B. Khollam; S.R. Jadkar; B.B. Kale; K.C. Mohite

doi:10.4028/www.scientific.net/AMR.1110.207

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1110Effect of Temperature on Optical and Photovoltaic...

Effect of Temperature on Optical and Photovoltaic Properties of nc-TiO₂ Thin Films for Dye Sensitized Solar Cell

Abstract:

In this investigation, anatase nanocrystalline TiO₂ (nc-TiO₂) films are deposited by using sol-gel dip coating method on ITO substrates followed by annealing at 200, 300, 400 and 500 °C / 2 hr in air. To examine the structure and morphology of films, XRD, Raman spectroscopy, SEM and HRTEM techniques are used. The XRD studies showed the evolution of pure anatase TiO₂ phase with average crystallite size = 12-15 nm in resultant films. The morphological studies using SEM and HRTEM indicated ~ uniform size distribution of spherical agglomerates in films and nanocrystalline state of films (average particle size ~ 20 nm) respectively. The optical properties calculated from UV-Visible transmission spectra are found to be indirect band gap energy = 3.20 eV, absorbance coefficient = 9.2 x 10⁴cm^-1, transmittance = 88.5 %, refractive index = 2.12 and porosity ratio = 36.6 % for the 400 °C annealed film. The better photovoltaic performance: J_SC = 2.34 mA/cm², V_OC = 0.562V, FF = 35.23 % & η = 0.46 % is obtained for eosin-Y dye sensitized solar cell made with 400 °C annealed film.

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Periodical:

Advanced Materials Research (Volume 1110)

Pages:

207-210

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1110.207

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Online since:

June 2015

Authors:

M.T. Sarode*, Y.B. Khollam, S.R. Jadkar, B.B. Kale, K.C. Mohite

Keywords:

Dye-Sensitized Solar Cell, nc-TiO₂ Films, Optical Property, Sol-Gel Processing

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