Solid-state and flexible solar cells based on dye-sensitized TiO2: study by electrochemical impedance spectroscopy

Claudia Longo; Flavia Nogueira; Hubert Cachet; Marco-Aurelio De Paoli

doi:10.1117/12.456936

21 February 2002 Solid-state and flexible solar cells based on dye-sensitized TiO₂: study by electrochemical impedance spectroscopy

Claudia Longo, Flavia Nogueira, Hubert Cachet, Marco-Aurelio De Paoli

Author Affiliations +

Proceedings Volume 4465, Organic Photovoltaics II; (2002) https://doi.org/10.1117/12.456936
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

Dye sensitized TiO₂ solar cells were assembled using rigid or flexible transparent electrodes (a conductive film deposited on glass or poly(ethylene terephthalate) as substrates and a polymer electrolyte based on (formula available in paper) and poly(epichlorohydrin-co-ethylene oxide). The cells were characterized by current-potential curves and electrochemical impedance spectroscopy under different light intensities. Under 100 mWcm^-2 illumination, the rigid cell exhibited an open circuit potential V_OC=0.75V, a short-circuit photocurrent I_SC=2.5 mAcm^-2 and an efficiency (eta) =0.9%; for the flexible cell, V_OC=0.83V and (eta) and I_SC were almost 10 times smaller. Under illumination, impedance spectra exhibited three semi-circles for the rigid cell. For the flexible cell the time constants were not well defined. In the dark, both systems presented very high impedance. The differences in the efficiency and the impedance spectra of both cells were compared and discussed.

Citation Download Citation

Claudia Longo, Flavia Nogueira, Hubert Cachet, and Marco-Aurelio De Paoli "Solid-state and flexible solar cells based on dye-sensitized TiO₂: study by electrochemical impedance spectroscopy", Proc. SPIE 4465, Organic Photovoltaics II, (21 February 2002); https://doi.org/10.1117/12.456936

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