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- Title
Facile preparation of anatase-stabilised gels using niobium chloride for efficient dye-sensitized solar cells.
- Authors
Bakhshayesh, A.; Farajisafiloo, N.
- Abstract
In this study, we reported a facile straightforward process for the deposition of uniform photoanode electrodes by a novel TiO gel for dye-sensitized solar cells (DSSCs) applications. Highly crystalline anatase-TiO phase is stabilised by niobium chloride at 500 °C. The electrodes are composed of uniform spherical particles with diameter around 3 µm, containing small nanoparticles with the average grain size of 40 nm, deposited by dip coating method. X-ray photoelectron spectroscopy revealed that 0.7 at.% Nb was incorporated into titania crystal lattice and stabilised anatase phase by limiting the transformation from anatase to rutile phase. UV-Visible spectra showed that the stabilised-film had lower band gap energy than that of undoped-TiO, extending the absorption of TiO into visible region. The anatase-stabilised DSSC had higher power conversion efficiency of 7.09 % than that of unstabilised cell (6.21 %) as a result of less recombination, which is demonstrated by electrochemical impedance spectroscopy.
- Subjects
COLLOID synthesis; TITANIUM dioxide; NIOBIUM chlorides; DYE-sensitized solar cells; SOLAR cell efficiency; X-ray photoelectron spectroscopy
- Publication
Journal of Materials Science: Materials in Electronics, 2015, Vol 26, Issue 6, p3409
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-015-2850-5