Journal
CHEMISTRYSELECT
Volume 7, Issue 9, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/slct.202103231
Keywords
vanadium nitride; DSSC; Pt free counter electrode; graphene; electro catalyst
Categories
Funding
- DST [DST/TDT/WMT/2017/050]
- UGC [41-156/2014(SR)]
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A platinum free hybrid counter electrode VNGp was synthesized for dye-sensitized solar cell by hydrothermal method. Various analysis techniques were used to characterize the VNGp composite, showing that the VNGp hybrid counter electrode exhibited adsorption-controlled process at the CE/electrolyte interface and had high fill factor and efficiency.
A Platinum free hybrid counter electrode (CE) Vanadium nitride/graphene (VNGp) for dye-sensitized solar cell (DSSC) was synthesized by hydrothermal method. The surface morphology and chemical composition of the as-prepared VNGp composite were analyzed by X-ray diffraction (XRD) analysis, Raman spectroscopy, high-resolution electron transmission microscopy (HR-TEM), and cyclic voltammetry (CV). The VNGp hybrid counter electrode displayed an adsorption-controlled process towards the (I-/I-3(-)) redox couple at CE/electrolyte interface and the value was calculated to be 3.16x10(-9) mol/s by varying the scan rate. The exchange current density (J(o)) was calculated as 6.59 mA/cm(2) from the Tafel slope. The VNGp hybrid counter shows a maximum fill factor (FF) of 66.28 with high efficacy of 8.15 % under the illumination of 100 mW/cm(2) as compared to the Pt CE for DSSC.
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