Template-free synthesis of Vanadium Nitride Nanopetals (VNNP) as a high performance counter electrode for dye sensitized solar cells.

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Date: Jan. 1, 2021
From: Solar Energy(Vol. 213)
Publisher: Elsevier Science Publishers
Document Type: Report; Brief article
Length: 285 words

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Abstract :

Keywords Vanadium nitride nanomaterial; DSSCs; Counter electrode; Pt electrode Highlights * Vanadium nitride nanopetals (VNNP) were synthesized by a simple template-free method. * Mesoporous VNNP showed excellent electrocatalytic activity and low charge transfer resistance. * DSSC with VNNP CE achieved PCE of 7.44% higher than DSSC with Pt CE (7.38%). * Results encourage to study different nanostructures of VN as CE for DSSC to replace Pt. Abstract The thrust of finding an alternative and noble metal free counter electrode (CE) for dye sensitized solar cells (DSSCs) encouraged the present study on new and unique structure of vanadium nitride nanopetals as counter electrode for DSSCs. Template-free vanadium nitride nanopetals were successfully synthesized by high temperature ammonia treatment of the precursor material viz. V.sub.2O.sub.5/melamine. The material analysis reveals the formation of highly crystalline vanadium nitride with mesoporous crosslinked intertwined nanopetals with pronounced electrocatalytic active sites leading to an excellent catalytic performance towards iodide/triiodide electrolyte, fast charge transfer kinetics, electron diffusion and low charge transfer resistance. The fabricated dye sensitized solar cell sandwiched with N719 dye loaded photoanode and VN nanopetals CE with an injection of iodide/triiodide electrolyte showed a significant power conversion efficiency (PCE) of 7.44%, which is higher than Pt CE (7.38%) under the same testing conditions. Results thus proved that the material is a promising candidate as an alternative counter electrode for Pt in DSSC. Author Affiliation: (a) Centre for Nanotechnology for Research, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India (b) Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam * Corresponding author. Article History: Received 19 July 2020; Revised 21 October 2020; Accepted 6 November 2020 Byline: Subashini Gnanasekar (a), Quyet Van Le (b), Andrews Nirmala Grace [anirmalagrace@vit.ac.in] (a,*)

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Gale Document Number: GALE|A648932516