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.
|Titolo:||Improving the Performance of Printable Carbon Electrodes by Femtosecond Laser Treatment|
|Data di pubblicazione:||2020|
|Appare nelle tipologie:||1.1 Articolo in rivista|
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|2020 - Improving the Performance of Printable Carbon Electrodes by Femtosecond Laser Treatment.pdf||Versione Editoriale (PDF)||Open Access Visualizza/Apri|