Structural Refinement and Optoelectronic Properties of (MoxTi1‐2xO2‐δ)1‐y(RGO)y Nanocomposites and Their Photovoltaic Studies with Natural Pigments as Sensitizers. Issue 1 (2nd January 2020)

• Record Type: Journal Article
• Authors: Dhodamani, Ananta G.; More, Krantiveer V.; Mullani, Sajid B.; Deshmukh, Shamkumar P.; Koli, Valmiki B.; Panda, Dillip K.; Delekar, Sagar D.
• Is Part Of: ChemistrySelect. Volume 5:Issue 1(2020)
• Page Start: 218
• Page End: 230
• Publication Date: 2020-01-02
• Subjects: Metal substitution -- Molybdenum dopant -- Natural sensitizers -- Sensitized solar cells -- Ternary hybrids; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201903606
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: In the present investigation, the optoelectronic properties of the binary TiO2 /RGO nanocomposites modified through the insertion Mo(VI) ions and thereafter these ternary nanocomposites (NCs) have been tested for I–V measurements using natural pigments as sensitizers. Initially, a series of (Mox Ti1‐2x O2‐δ )1‐y (RGO)y [x=0.5 to 3.0 mol %; y=0.75 wt.%] NCs was prepared by using in‐situ chemical approach. XRD Rietveld refinement reveals the formation of single phase only with substitution of two Ti(IV) ions by single Mo(VI) ions in the ternary NCs . After the well characterizations, these NCs are deposited on the FTO substrate using binder‐free doctor blade technique and then these are sensitized with N719 dyes (model protocol) as well as natural pigments and measured under solar simulator for knowing the photovoltaic performances. Among the different photoelectrodes, I–V and IPCE measurements of (Mo0.100 Ti0.980 O1.990 )0.925 (RGO)0.075 NCs sensitized with N719 showing the highest power conversion efficiency of 7.58% which is higher to that of TiO2 /RGO (η= 5.81%) based photoelectrodes. For the optimized photoelectrode composition with N719, natural pigment Betalain based dye sensitized solar cells (DSSCs) show the highest efficiency of 2.23% which opposes to an efficiency of 0.38, 1.29, and 1.13% for Lawsone, Curcumin and Anthocyanin sensitized DSSCs, respectively. Abstract : Present investigation highlights the optoelectronic properties of the ternary hybrid (Mox Ti1‐2x O2‐δ )1‐y (RGO)y nanocomposites in relation to photovoltaic studies. The binder free deposited nanocomposites (NCs) sensitized with N719 for constructing the dye sensitized solar cells (DSSCs) (model protocol) and shows the highest power conversion efficiency of 7.58% for (Mo0.100 Ti0.980 O1.990 )0.925 (RGO)0.075 NC. Again the optimized NC photoelectrode sensitized with natural pigments viz. Lawsone, Curcumin, Anthocyanin and Betalain respectively. The highest conversion efficiency was reached upto 2.23% for Betalain sensitized DSSCs which is due to the well anchoring and higher absorption properties of the Betalain compared to others was also defined.