Facile synthesis of hollow urchin-like Nb2O5 nanostructures and their performance in dye-sensitized solar cells

In present study, hollow urchin-like nanostructures of Nb 2 O 5 with elongated nanofilaments as photoanode material for dye-sensitized solar cells (DSSCs) are successfully synthesized at different reaction times (viz. 12, 24, and 40 h, respectively, named as samples NB-1, NB-2, and NB-3) using facil...

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Veröffentlicht in:Journal of solid state electrochemistry 2020-02, Vol.24 (2), p.273-281
Hauptverfasser: Mohite, Neeta, Shinde, Manish, Gupta, Arun Kumar, Waghadkar, Yogesh, Gosavi, Suresh W., Mohite, K. C., Chauhan, Ratna, Rane, Sunit
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container_issue 2
container_start_page 273
container_title Journal of solid state electrochemistry
container_volume 24
creator Mohite, Neeta
Shinde, Manish
Gupta, Arun Kumar
Waghadkar, Yogesh
Gosavi, Suresh W.
Mohite, K. C.
Chauhan, Ratna
Rane, Sunit
description In present study, hollow urchin-like nanostructures of Nb 2 O 5 with elongated nanofilaments as photoanode material for dye-sensitized solar cells (DSSCs) are successfully synthesized at different reaction times (viz. 12, 24, and 40 h, respectively, named as samples NB-1, NB-2, and NB-3) using facile hydrothermal route. We have studied the significant influence of hydrothermal reaction time on the structural, optical, morphological, and electrical properties. The photovoltaic performance of different samples is understood from response of current-potential ( J - V ) curve and incident photon-to-current efficiency (IPCE) while charge recombination behavior and resistance of the cells are studied by electrochemical impedance spectroscopy (EIS). The X-ray diffraction (XRD) study shows the orthorhombic crystalline form for the synthesized samples. Electron microscopy studies confirm the formation of porous spherical morphology with hairy filaments protruding outward. Size of urchin-like particle is found to be in the range of about 1 μm diameter, and the filaments emerging out from the surface of hollow spheres are seen to be 30–70 nm long and 5–20 nm in diameter. The DSSCs fabricated from the resultant nanostructures show the better photovoltaic performance with Nb 2 O 5 sample synthesized at 24-h reaction time. The J sc and efficiency for NB-2 are 8.24 mAcm −2 and 3.58% respectively, which are better than corresponding samples synthesized at the reaction time of 12 h and 40 h, respectively. These photovoltaic results obtained from the DSSCs fabricated using Nb 2 O 5 nanostructures are comparatively exciting with TiO 2 spheres. By further optimizing reaction conditions, it is expected that niobium pentoxide can emerge as better semiconductor oxide for photovoltaic and optical devices. Graphical abstract Hydrothermal synthesis of novel hollow urchin-like spheres of Nb 2 O 5 with hairy surface and employed as photoanodes in DSSCs with enhanced photovoltaic parameters.
doi_str_mv 10.1007/s10008-019-04481-5
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The X-ray diffraction (XRD) study shows the orthorhombic crystalline form for the synthesized samples. Electron microscopy studies confirm the formation of porous spherical morphology with hairy filaments protruding outward. Size of urchin-like particle is found to be in the range of about 1 μm diameter, and the filaments emerging out from the surface of hollow spheres are seen to be 30–70 nm long and 5–20 nm in diameter. The DSSCs fabricated from the resultant nanostructures show the better photovoltaic performance with Nb 2 O 5 sample synthesized at 24-h reaction time. The J sc and efficiency for NB-2 are 8.24 mAcm −2 and 3.58% respectively, which are better than corresponding samples synthesized at the reaction time of 12 h and 40 h, respectively. These photovoltaic results obtained from the DSSCs fabricated using Nb 2 O 5 nanostructures are comparatively exciting with TiO 2 spheres. By further optimizing reaction conditions, it is expected that niobium pentoxide can emerge as better semiconductor oxide for photovoltaic and optical devices. 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subjects Analytical Chemistry
Characterization and Evaluation of Materials
Charge efficiency
Chemical synthesis
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Current efficiency
Dye-sensitized solar cells
Dyes
Electrical properties
Electrochemical impedance spectroscopy
Electrochemistry
Energy Storage
Filaments
Hydrothermal reactions
Morphology
Nanostructure
Niobium oxides
Optical properties
Original Paper
Photovoltaic cells
Physical Chemistry
Reaction time
Titanium dioxide
title Facile synthesis of hollow urchin-like Nb2O5 nanostructures and their performance in dye-sensitized solar cells
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