Low-cost carbon-conductive films were screen-printed on a Plexiglas® substrate, and then, after a standard annealing procedure, subjected to femtosecond (fs) laser treatments at different values of total accumulated laser fluence ΦA. Four-point probe measurements showed that, if ΦA > 0.3 kJ/cm2, the sheet resistance of laser-treated films can be reduced down to about 15 Ω/sq, which is a value more than 20% lower than that measured on as-annealed untreated films. Furthermore, as pointed out by a comprehensive Raman spectroscopy analysis, it was found that sheet resistance decreases linearly with ΦA, due to a progressively higher degree of crystallinity and stacking order of the graphitic phase. Results therefore highlight that fs-laser treatment can be profitably used as an additional process for improving the performance of printable carbon electrodes, which have been recently proposed as a valid alternative to metal electrodes for stable and up-scalable perovskite solar cells.

Improving the performance of printable carbon electrodes by femtosecond laser treatment / Girolami, Marco; Bellucci, Alessandro; Mastellone, Matteo; Serpente, Valerio; Orlando, Stefano; Valentini, Veronica; Palma, Alessandro L.; Di Carlo, Aldo; Trucchi, Daniele M.. - In: C. - ISSN 2311-5629. - 6:3(2020). [10.3390/c6030048]

Improving the performance of printable carbon electrodes by femtosecond laser treatment

Matteo Mastellone;
2020

Abstract

Low-cost carbon-conductive films were screen-printed on a Plexiglas® substrate, and then, after a standard annealing procedure, subjected to femtosecond (fs) laser treatments at different values of total accumulated laser fluence ΦA. Four-point probe measurements showed that, if ΦA > 0.3 kJ/cm2, the sheet resistance of laser-treated films can be reduced down to about 15 Ω/sq, which is a value more than 20% lower than that measured on as-annealed untreated films. Furthermore, as pointed out by a comprehensive Raman spectroscopy analysis, it was found that sheet resistance decreases linearly with ΦA, due to a progressively higher degree of crystallinity and stacking order of the graphitic phase. Results therefore highlight that fs-laser treatment can be profitably used as an additional process for improving the performance of printable carbon electrodes, which have been recently proposed as a valid alternative to metal electrodes for stable and up-scalable perovskite solar cells.
printable carbon electrodes; femtosecond laser; sheet resistance; raman spectroscopy; perovskite solar cells
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Improving the performance of printable carbon electrodes by femtosecond laser treatment / Girolami, Marco; Bellucci, Alessandro; Mastellone, Matteo; Serpente, Valerio; Orlando, Stefano; Valentini, Veronica; Palma, Alessandro L.; Di Carlo, Aldo; Trucchi, Daniele M.. - In: C. - ISSN 2311-5629. - 6:3(2020). [10.3390/c6030048]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1493567
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