Low-Temperature Hydrogen Plasma Reduction of Graphene Oxide Counter Electrodes for Printed Dye-Sensitized Solar Cells

• Autoři: GEMEINER Pavol; HOMOLA Tomáš; HATALA Michal; MIKULA Milan
• Rok publikování: 2020
• Druh: Článek ve sborníku
• Konference: 11th International Conference on Nanomaterials - Research & Application NANOCON 2019
• Fakulta / Pracoviště MU: Přírodovědecká fakulta
• www: https://doi.org/10.37904/nanocon.2019.8700
• Doi: http://dx.doi.org/10.37904/nanocon.2019.8700
• Klíčová slova: Graphene oxide; plasma reduction; dye-sensitized solar cell; counter electrode; printed electronics

Přiložené soubory

• 2020_-_Gemeiner_et_al._-_Low-temperature_Hydrogen_Plasma_Reduction_of_Graphene_Oxide_Counter_Electrodes_for_Printed_Dye-sensitized_Solar.pdf

• Popis: In this work, solution-processable graphene oxide (GO) dispersions were used for the simple preparation of thin GO layers (50 nm thickness), which were reduced by low-temperature hydrogen plasma. Hydrogen plasma reduction (ideal treatment time 8 sec) led to a decrease of oxygen-containing groups and consequently, in the transformation of sp3-carbon oxidized domains to preferable sp2-carbon aromatic domains in rGO layers (XPS). GO and rGO layers were used as counter-electrodes (CEs) in printed dye-sensitized solar cells (DSSCs). DSSCs with rGO CEs reached an increased conversion efficiency of 0.9 % compared to DSSCs based on GO CEs with 0.4%. This can be attributed to the higher catalytic activity of plasma reduced rGO CEs in the presence of iodine electrolyte and also lower sheet resistance compared to GO CEs.

Související projekty

• Plasma engineering of nanostructured coatings for next-generation flexible materials