<abstract xmlns="http://www.w3.org/1999/xhtml"> Use of Degussa P25 titanium-dioxide nanopowder in dye-sensitized solar cell (DSSC) photoanode improves efficiency of the DSSC cell. Annealing of titanium dioxide is required for fabrication of crystalline mesoporous thin film photoanode on transparent conducting glass using doctor blade method. Different annealing temperatures provide different structural, morphological, and optical properties of the photoanode, which may influence the efficiency of the cell. In this paper, energy-dispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM), X-ray powder diffraction (XRD), and UV-Vis-NIR spectroscopicanalysis have been carried out to investigate annealing temperature effect on various structural parameters, mole-fraction, phase-content, and optical bandgap of the TiO2 film photoanode. It was observed that depending on annealing temperature, theratio of polymorphs of Degussa P25 changed substantially. For the change in annealing temperature from 350 °C to 600 °C, variations occurred in crystallite size from 11.9 nm to 24.9 nm, strain from 0.006 to 0.014, specific surface area from 62.77 m2·g-1 to 125.74 m2·g-1, morphology index from 0.49 to 0.64, dislocation density from 5 × 1013 line/m2 to 8 × 1015 line/m2, crystallite per unit surface area from 2 × 1013 m-2 to 2.5 × 1014 m-2, and optical bandgap from 2.4 eV to 3.1 eV. </abstract>

Use of Degussa P25 titanium-dioxide nanopowder in dye-sensitized solar cell (DSSC) photoanode improves efficiency of the DSSC cell. Annealing of titanium dioxide is required for fabrication of crystalline mesoporous thin film photoanode on transparent conducting glass using doctor blade method. Different annealing temperatures provide different structural, morphological, and optical properties of the photoanode, which may influence the efficiency of the cell. In this paper, energy-dispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM), X-ray powder diffraction (XRD), and UV-Vis-NIR spectroscopicanalysis have been carried out to investigate annealing temperature effect on various structural parameters, mole-fraction, phase-content, and optical bandgap of the TiO2 film photoanode. It was observed that depending on annealing temperature, theratio of polymorphs of Degussa P25 changed substantially. For the change in annealing temperature from 350 °C to 600 °C, variations occurred in crystallite size from 11.9 nm to 24.9 nm, strain from 0.006 to 0.014, specific surface area from 62.77 m2·g-1 to 125.74 m2·g-1, morphology index from 0.49 to 0.64, dislocation density from 5 × 1013 line/m2 to 8 × 1015 line/m2, crystallite per unit surface area from 2 × 1013 m-2 to 2.5 × 1014 m-2, and optical bandgap from 2.4 eV to 3.1 eV.

Annealing temperature effect on structural, morphological and optical parameters of mesoporous TiO2 film photoanode for dye-sensitized solar cell application

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Annealing temperature effect on structural, morphological and optical parameters of mesoporous TiO film photoanode for dye-sensitized solar cell application

Use of Degussa P25 titanium-dioxide nanopowder in dye-sensitized solar cell (DSSC) photoanode improves efficiency of the DSSC cell. Annealing of titanium...

Annealing temperature effect on structural, morphological and optical parameters of mesoporous TiO₂ film photoanode for dye-sensitized solar cell application

Published Online: Mar 20, 2018

Page range: 868 - 877

Received: Jul 09, 2017

Accepted: Sep 22, 2017

DOI: https://doi.org/10.1515/msp-2017-0082

Keywords
TiO2 photoanode, mesoporous TiO2, doctor blade method, Degussa P25, optical bandgap, spectroscopic analysis

© 2018

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Annealing temperature effect on structural, morphological and optical parameters of mesoporous TiO2 film photoanode for dye-sensitized solar cell application

Published Online: Mar 20, 2018

Page range: 868 - 877

Received: Jul 09, 2017

Accepted: Sep 22, 2017

DOI: https://doi.org/10.1515/msp-2017-0082

KeywordsTiO2 photoanode, mesoporous TiO2, doctor blade method, Degussa P25, optical bandgap, spectroscopic analysis

© 2018

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Annealing temperature effect on structural, morphological and optical parameters of mesoporous TiO₂ film photoanode for dye-sensitized solar cell application

Keywords
TiO2 photoanode, mesoporous TiO2, doctor blade method, Degussa P25, optical bandgap, spectroscopic analysis