Development of MoSe 2 /PANI composite nanofibers as an alternative to Pt counter electrode to boost the photoconversion
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ORIGINAL PAPER
Development of MoSe2/PANI composite nanofibers as an alternative to Pt counter electrode to boost the photoconversion efficiency of dye sensitized solar cell E. S. Sowbakkiyavathi 1,2 & Vignesh Murugadoss 1 & Ramadasse Sittaramane 2 & Subramania Angaiah 1 Received: 18 April 2020 / Revised: 12 June 2020 / Accepted: 15 June 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract In this work, a simple hydrothermally prepared molybdenum diselenide (MoSe2) was mixed with polyaniline (PANI) nanofibers at 1:1 Wt% in deionized water by using an ultrasonicator for few minutes and then filtered and dried at 100 °C to get MoSe2/ PANI composite nanofibers to use as a counter electrode (CE) for high-performance dye-sensitized solar cell (DSSC). The X-ray diffractometer (XRD) result confirms the formation of MoSe2/PANI composite nanofibers with high purity, which is consistent with the result of Raman spectrum. Field emission scanning electron microscopy (FE-SEM) studies confirm the decoration of MoSe2 nanoparticles onto the surface of polyaniline nanofibers and their chemical composition was calculated by energydispersive X-ray spectroscopy (EDX). The cyclic voltammetry (CV) study shows that MoSe2/PANI composite nanofibers as CE have good electrocatalytic activity, fast electron transport rate with increased current flow than the individual MoSe2 and PANI CEs. From AC-impedance analysis, it is cleared that MoSe2/PANI composite nanofibers based CE have lower chargetransfer resistance (Rct) with higher electrocatalytic behavior for I3−/I− redox pair than the pure MoSe2, PANI, and Pt-based CEs. Moreover, MoSe2/PANI composite nanofibers based DSSC show higher cell efficiency of 8.04% than the pure MoSe2, PANI, and Pt-based DSSCs. It revealed that MoSe2/PANI CE could be used as a promising candidate for DSSC. Keywords Dye-sensitized solar cell . MoSe2 . PANI . Composite nanofibers . Electrocatalytic activity . Counter electrode
Introduction Nowadays, researchers have put their effort to develop advanced materials to overcome the energy crisis by means of various solar technologies. Among them, dye-sensitized solar cell (DSSC) plays a predominant role for the betterment of renewable energy source [1]. In DSSC, the counter electrode (CE) is the main components to raise the cell performance [2, 3]. Earlier, platinum (Pt) is used as a counter electrode, but the high cost and chance of corrosion in I3−/I− of an electrolyte solution have obstructed its practical application [4, 5]. For the
* Subramania Angaiah [email protected] 1
Electro-Materials Research Laboratory, Centre for Nanoscience and Technology, Pondicherry University, Puducherry 605 014, India
2
Department of Physics, Kanchi Mamunivar Govt. Institute for PG Studies and Research, Puducherry 605 008, India
past decade, conducting polymers (CPs) are used as an alternative to Pt CE, because of its low cost and environmentally friendliness [6]. Among the various CPs, polyaniline [7] has good electrical conductivity, because of the imi
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