LOW-TEMPERATURE HYDROGEN PLASMA REDUCTION OF GRAPHENE OXIDE COUNTER ELECTRODES FOR PRINTED DYE-SENSITIZED SOLAR CELLS

1 GEMEINER Pavol
Co-authors:
2 HOMOLA Tomáš 1 HATALA Michal 1 MIKULA Milan
Institutions:
1 Departament of Graphic Arts Technology and Applied Photochemistry, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Bratislava, Slovakia, EU, pavol.gemeiner@stuba.sk
2 R&D Center for Low-Cost Plasma and Nanotechnology Surface Modifications (CEPLANT), Department of Physical Electronics, Faculty of Science, Masaryk University, Brno, Czech Republic, tomas.homola@mail.muni.cz
Conference:
11th International Conference on Nanomaterials - Research & Application, Hotel Voronez I, Brno, Czech Republic, EU, October 16th - 18th 2019
Proceedings:
Proceedings 11th International Conference on Nanomaterials - Research & Application
Pages:
210-214
ISBN:
978-80-87294-95-6
ISSN:
2694-930X
Published:
1st April 2020
Proceedings of the conference have been sent to Web of Science and Scopus for evaluation and potential indexing.
Metrics:
17 views / 6 downloads
Abstract

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-sensitizedsolar cells (DSSCs). DSSCs with rGO CEs reached an increased conversion efficiency of η = 0.9 % compared to DSSCs based on GO CEs with η = 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 (˂100 MΩ/□) compared to GO CEs.

Keywords: Graphene oxide, plasma reduction, dye-sensitized solar cell, counter electrode, printed electronics
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