A novel multilayered photoelectrode with nitrogen doped TiO2 for efficiency enhancement in dye sensitized solar cells
Artikel i vetenskaplig tidskrift, 2017

Nitrogen doped TiO2 powder samples were synthesized by a modified wet chemical method using aqueous ammonia and nitrogen gas purged on titanium tetra isopropoxide (TTIP). Photolectrodes with different combinations of layers of nitrogen ? doped TiO2, undoped TiO2 and Degussa P25 TiO2 powders were used in dye sensitized solar cells (DSSCs). The highest conversion efficiency of 8.00% was achieved by the cells fabricated with compact layer/P25/N-doped TiO2 multilayer photoelectrode. This is an impressive enhancement in efficiency close to 89% with respect to a similar multilayer electrode made with undoped TiO2 which showed a conversion efficiency of 4.22%. The enhancement in the efficiency appears to be due to the increased photocurrent density of the DSSCs resulting mainly from energy band gap narrowing due to N-doping with some contribution from increased dye uptake by the novel multilayer electrode. These results have been substantiated by the reduced charge transfer resistance obtained from Electrochemical Impedance Spectra and the enhanced IPCE spectra of the DSSCs with N-doped TiO2 based multilayer electrode.

N-doped TiO2

TiO2 multilayer photoelectrode

Efficiency enhancement

Dye sensitized solar cells

Författare

MAKL Dissanayake

Institute of Fundamental Studies Kandy

University of Peradeniya

J. M.K.W. Kumari

University of Peradeniya

Institute of Fundamental Studies Kandy

G. K. R. Senadeera

Open University of Sri Lanka

University of Peradeniya

Institute of Fundamental Studies Kandy

C. A. Thotawatthage

Institute of Fundamental Studies Kandy

University of Peradeniya

Bengt-Erik Mellander

Chalmers, Fysik, Subatomär fysik och plasmafysik

Ingvar Albinsson

Göteborgs universitet

Journal of Photochemistry and Photobiology A: Chemistry

1010-6030 (ISSN)

Vol. 349 63-72

Drivkrafter

Hållbar utveckling

Styrkeområden

Energi

Materialvetenskap

Ämneskategorier

Materialkemi

DOI

10.1016/j.jphotochem.2017.08.067