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Electrocatalytic Activation of a DSSC Graphite Composite Counter Electrode Using In Situ Polymerization of Aniline in a Water/Ethanol Dispersion of Reduced Graphene Oxide
Sunarya R.R.a,b, Hidayat R.a, Radiman C.L.a, Suendo V.a
a Inorganic and Physical Chemistry Division, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Bandung, 40132, Indonesia
b Department of Chemistry Education, Faculty of Tarbiya and Teacher Training, UIN Sunan Gunung Djati Bandung, Bandung, 40614, Indonesia
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]© 2020, The Minerals, Metals & Materials Society.Major drawbacks of a Pt-free counter electrode in dye-sensitized solar cells (DSSCs) are low electrical conductivity and low electrocatalytic activity. One of the promising materials for use in the counter electrode in DSSCs is graphite. It is well-known that graphite provides notable electrical conductivity, but has low electrocatalytic activity. Therefore, the surface of the graphite electrode has to be covered by an electrocatalytically active material. The presence of an electrocatalytically active layer will facilitate charge transfer at the electrode–electrolyte interface. In this report, we demonstrate the combination of reduced graphene oxide (rGO) and polyaniline (PANI) to enhance the electrocatalytic activity of a graphite counter electrode. rGO is synthesized from graphite using the sonication–oxidation method followed by reduction using ascorbic acid. This technique produced two types of rGO: floated and precipitated rGOs. PANI was grown on the surfaces of dispersed rGO in a water/ethanol system using an in situ polymerization technique. This technique resulted in both low-conductivity PANI–floated rGO (PANI–FrGO) and high-conductivity PANI–precipitated rGO (PANI–PrGO). In the composite electrode, rGO acts as a bridge between the graphite surface, and polyaniline acts as the electrocatalytically active material. The highest photovoltaic performance was obtained for a cell using the graphite/PANI–PrGO composite counter electrode. This cell gives an optimal open-circuit voltage (Voc), fill factor (FF), overall conversion efficiency (η), and short-circuit current density (Jsc) of 0.66 V, 0.508, 1.83% and 4.899 mA/cm2, respectively. Measurement of photovoltaic performance was carried out under 100 mW cm−2 of air mass (AM) 1.5 illumination. The contribution of PANI–rGO on the graphite composite counter electrode was demonstrated to enhance photovoltaic performance that opens an alternative route for the low-cost fabrication of Pt-free DSSC counter electrodes.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Counter electrodes,Electrical conductivity,Electrocatalytic,Electrocatalytic activity,In-situ polymerization,Overall conversion efficiency,Photovoltaic performance,Reduced graphene oxides (RGO)[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Composite counter electrode,dye-sensitized solar cell,electrocatalytic activation,graphite/PANI–rGO composite,in situ polymerization[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text][{‘$’: ‘This research was financially supported by Penelitian Dasar Unggulan Perguruan Tinggi (PDUPT) research grant nos. 1/E/KPT/2018 and 1/E1/KP.PTNBH/2019, Indonesian Ministry of Research, Technology and Higher Educations. R. R. Sunarya acknowledges the MORA Scholarship Ministry of Religious Affairs, Republic of Indonesia, for scholarship support. V. Suendo and R. R. Sunarya acknowledge PT. Arfindo Bersinar for ESR measurements.’}, {‘$’: ‘This research was financially supported by Penelitian Dasar Unggulan Perguruan Tinggi (PDUPT) research grant nos. 1/E/KPT/2018 and 1/E1/KP.PTNBH/2019, Indonesian Ministry of Research, Technology and Higher Educations. R. R. Sunarya acknowledges the MORA Scholarship Ministry of Religious Affairs, Republic of Indonesia, for scholarship support. V. Suendo and R. R. Sunarya acknowledge PT. Arfindo Bersinar for ESR measurements.’}][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1007/s11664-020-07977-3[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]