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Digital printing of efficient dye-sensitized solar cells (DSSCs)

Abstract : This study reports on the printing of TiO2 nanoparticles and the sensitization of the photoanode by a new digital printing technology, named Digital Materials Deposition "DMD" to fabricate semi-transparent DSSCs. In this study, the push-pull dye coded "D35" and I3 − /I − were used respectively as sensitizer and redox mediator. The photovoltaic performances of the solar cells printed with the DMD technology were compared to those prepared by the conventional method consisting of screen-printed nanoparticles and dying process by overnight soaking of the electrode into a solution of the sensitizer. Scanning Electron Microscopy shows that the DMD printed film is more porous than the one deposited by screen printing. The cells prepared by DMD give higher solar energy conversion efficiency (Jsc= 12.65 mA/cm 2 , Voc= 775 mV, FF=75%, PEC=7.4%) than with conventional screen-printing technique (Jsc = 10.03 mA/cm 2 , Voc= 760 mV, FF =72 %, PEC=5.48%). IMVS/IMPS measurements demonstrate that the superior photocurrent density delivered by DMD printed solar cells is due to a higher charge collection efficiency. Overall, this study demonstrates that DMD technology simplifies the DSSC fabrication process with a reduction of the material consumption and it is quick and efficient representing an innovative and attractive method to manufacture DSSCs. 2
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https://hal.archives-ouvertes.fr/hal-03015248
Contributor : Fabrice Odobel <>
Submitted on : Thursday, November 19, 2020 - 6:07:36 PM
Last modification on : Thursday, December 3, 2020 - 3:22:15 AM

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Mahfoudh Raïssi, Yann Pellegrin, François-Xavier Lefevre, Mohammed Boujtita, Didier Rousseau, et al.. Digital printing of efficient dye-sensitized solar cells (DSSCs). Solar Energy, Elsevier, 2020, 199, pp.92-99. ⟨10.1016/j.solener.2020.02.004⟩. ⟨hal-03015248⟩

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