Photovoltaic performance of non-covalent functionalized single-layer graphene in dye-sensitized solar cells (DSSCs)
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Photovoltaic performance of non-covalent functionalized single-layer graphene in dye-sensitized solar cells (DSSCs) Erdal Igman1,2,* Onder Simsek6
, Ozkan Bayram1,2,3, Ahmet Mavi4, Ugur Cem Hasar5, and
1
Department of Material Science and Nanotechnology Engineering, Bayburt University, TR-69100 Bayburt, Turkey Graduate School Natural and Apply Science, Department Nanoscience and Nanoengineering, Ataturk University, TR-25240 Erzurum, Turkey 3 Central Application and Research Laboratory (BUMER), Bayburt University, TR-69100 Bayburt, Turkey 4 Department of Chemistry Education, Ataturk University, TR-25240 Erzurum, Turkey 5 Electrical and Electronics Eng. Department, University of Gaziantep, TR-27310 Gaziantep, Turkey 6 Central Application and Research Laboratory (MERLAB), Agri Ibrahim Cecen University, 04100 Agri, Turkey 2
Received: 17 July 2020
ABSTRACT
Accepted: 3 November 2020
In this study, it was aimed to fabricate new effective alternative counter electrodes (CEs) in dye-sensitized solar cells (DSSCs). For this purpose, firstly, single-layer graphene (SLG) thin films were grown by chemical vapor deposition (CVD) method. Then, these films were separately functionalized with 1,8cineole (ppCin/SLG), D-Limonene (ppLim/SLG) and Thiophene (ppTh/SLG) by plasma polymerization. Number of layers in CVD-grown graphene determined by Raman, transmission electron microscope (TEM) and ultraviolet– visible (UV–Vis) spectroscopy. Chemical structures of plasma polymerised (pp) thin films were investigated by Fourier transform infrared (FTIR) spectroscopy. Photovoltaic parameters of DSSCs were calculated, and electrocatalytic properties of CEs were investigated by electrochemical impedance spectroscopy (EIS). Polymer functionalization greatly enhanced the electrical conductivity and electrocatalytic activity properties of graphene compared to that of SLG. The efficiencies of DSSCs with ppCin/SLG and ppLim/SLG CEs were 1.10% and 1.02%, respectively. As a result, the cell efficiencies of ppCin/SLG and ppLim/SLG could be as alternative materials to platinum (Pt) counter electrode.
Published online: 19 November 2020
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Springer Science+Business
Media, LLC, part of Springer Nature 2020
Handling Editor: Yaroslava Yingling.
Address correspondence to E-mail: [email protected]
https://doi.org/10.1007/s10853-020-05535-0
J Mater Sci (2021) 56:4184–4196
Introduction Since first fabricated in 1991 [1], dye-sensitized solar cells (DSSCs) have attracted the attention of many researchers for their advantages such as easy fabrication, low production cost, environmentally friendly and relatively high cell efficiency [2]. In general, DSSCs consist of a dye-sensitized semiconductor photoanode, an iodide/triiodide electrolyte solution and a counter electrode (CE). Platinum (Pt) electrodes with high electrocatalytic activity and electrical conductivity are generally used as CE in DSSCs [3]. Due to its high cost, depletion resources in nature and poor corrosive behavior to the redox solution containing I-/I3- [4], counter electrode mat
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