Vertically Aligned TiO<sub>2</sub> Nanotubes on Plastic Substrates for Flexible Solar Cells
Vardan GalstyanCNR IDASC SENSOR Lab and Dipartimento di Chimica e Fisica per l'Ingegneria e per i Materiali, University of Brescia, Via Valotti 9, 25133 Brescia, ItalyAlberto VomieroCNR IDASC SENSOR Lab and Dipartimento di Chimica e Fisica per l'Ingegneria e per i Materiali, University of Brescia, Via Valotti 9, 25133 Brescia, ItalyIsabella ConcinaCNR IDASC SENSOR Lab and Dipartimento di Chimica e Fisica per l'Ingegneria e per i Materiali, University of Brescia, Via Valotti 9, 25133 Brescia, ItalyAntonio BragaCNR IDASC SENSOR Lab and Dipartimento di Chimica e Fisica per l'Ingegneria e per i Materiali, University of Brescia, Via Valotti 9, 25133 Brescia, ItalyMariangela BrisottoINSTM and Chemistry for Technologies Laboratory, University of Brescia, Via Branze 28, 25133 Brescia, ItalyElza BontempiINSTM and Chemistry for Technologies Laboratory, University of Brescia, Via Branze 28, 25133 Brescia, ItalyG. FagliaCNR IDASC SENSOR Lab and Dipartimento di Chimica e Fisica per l'Ingegneria e per i Materiali, University of Brescia, Via Valotti 9, 25133 Brescia, ItalyGiorgio SberveglieriCNR IDASC SENSOR Lab and Dipartimento di Chimica e Fisica per l'Ingegneria e per i Materiali, University of Brescia, Via Valotti 9, 25133 Brescia, Italy
2011en
ABI
Abstract
Electrochemical anodization of a titanium film on a Kapton HN substrate leads to the formation of closely packed aligned nanotubes, whose shape can be finely tuned by tailoring the anodization parameters. An amorphous-to-anatase phase transition is induced on nanotubes by annealing at 350 °C. The nanotubes are applied as photoanodes in flexible dye-sensitized solar cells (N719 dye; I3-/I- redox couple), resulting in a photoconversion efficiency of up to 3.5% under simulated sunlight irradiation air mass 1.5 global (AM 1.5G).
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