Structural, morphological, and optical studies of hydrothermally synthesized Nb-added TiO2 for DSSC application

Sandeep B. Wategaonkar; Vinayak G. Parale; Rani P. Pawar; Sawanta S. Mali; Chang Kook Hong; Rohit R. Powar; Annasaheb V. Moholkar; Hyung Ho Park; Balasaheb M. Sargar; Raghunath K. Mane

doi:10.1016/j.ceramint.2021.05.284

Structural, morphological, and optical studies of hydrothermally synthesized Nb-added TiO₂ for DSSC application

Sandeep B. Wategaonkar, Vinayak G. Parale, Rani P. Pawar, Sawanta S. Mali, Chang Kook Hong, Rohit R. Powar, Annasaheb V. Moholkar, Hyung Ho Park, Balasaheb M. Sargar, Raghunath K. Mane

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

Abstract

Herein, titanium dioxide (TiO₂) nanoparticles doped with various concentrations (0–7 wt %) of niobium (Nb) are hydrothermally synthesized and used effectively as a photoelectrode for application in dye-sensitized solar cells (DSSCs). The rutile-to-anatase phase transition, accompanied by a change in crystallite size from 23.75 to 9.77 nm, is confirmed via X-ray diffraction (XRD) and Fourier transform (FT)-Raman spectroscopy. In addition, the prepared Nb–TiO₂ nanoparticles exhibit a spherical morphology with a mean grain diameter of 43.38–50.69 nm. Further, X-ray photoelectron spectroscopy (XPS) indicates a shift in the Fermi level of the TiO₂ towards the conduction band minimum, and an increase in the bandgap from 2.69 to 2.88 eV, with increasing Nb concentration. The resulting increases in the short-circuit current density (J_SC) and open circuit voltage (V_OC) with the increased injection and conductivity of electrons lead to the enhancement of the DSSC performance. EIS measurements represents the effect of Nb doping on charge transporting and recombination behavior of DSSCs. Moreover, the Nb–TiO₂-based DSSCs provide a better power conversion performance as compared to that of the pristine TiO₂.

Original language	English
Pages (from-to)	25580-25592
Number of pages	13
Journal	Ceramics International
Volume	47
Issue number	18
DOIs	https://doi.org/10.1016/j.ceramint.2021.05.284
Publication status	Published - 2021 Sept 15

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea Grant funded by the Government of South Korea ( NRF 2020R1A5A1019131 ), and the Korea Research Fellowship Program through the National Research Foundation of Korea ( NRF ) funded by the Ministry of Science, ICT , and Future Planning ( 2016H1D3A1909289 ) for an outstanding overseas young researcher. Author SBW is thankful to PSM, SSP, and DPN for providing laboratory facilities. Author SBW is thankful to VVG, PSM, SPP, VM, AL and DPN for the research discussion and for providing laboratory facilities.

Funding Information:
This work was supported by the National Research Foundation of Korea Grant funded by the Government of South Korea (NRF 2020R1A5A1019131), and the Korea Research Fellowship Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT, and Future Planning (2016H1D3A1909289) for an outstanding overseas young researcher. Author SBW is thankful to PSM, SSP, and DPN for providing laboratory facilities. Author SBW is thankful to VVG, PSM, SPP, VM, AL and DPN for the research discussion and for providing laboratory facilities.

Publisher Copyright:
© 2021 Elsevier Ltd and Techna Group S.r.l.

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Process Chemistry and Technology
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/j.ceramint.2021.05.284

Cite this

@article{e3066fc5cd0f4128a8494d89b10e2da0,

title = "Structural, morphological, and optical studies of hydrothermally synthesized Nb-added TiO2 for DSSC application",

abstract = "Herein, titanium dioxide (TiO2) nanoparticles doped with various concentrations (0–7 wt %) of niobium (Nb) are hydrothermally synthesized and used effectively as a photoelectrode for application in dye-sensitized solar cells (DSSCs). The rutile-to-anatase phase transition, accompanied by a change in crystallite size from 23.75 to 9.77 nm, is confirmed via X-ray diffraction (XRD) and Fourier transform (FT)-Raman spectroscopy. In addition, the prepared Nb–TiO2 nanoparticles exhibit a spherical morphology with a mean grain diameter of 43.38–50.69 nm. Further, X-ray photoelectron spectroscopy (XPS) indicates a shift in the Fermi level of the TiO2 towards the conduction band minimum, and an increase in the bandgap from 2.69 to 2.88 eV, with increasing Nb concentration. The resulting increases in the short-circuit current density (JSC) and open circuit voltage (VOC) with the increased injection and conductivity of electrons lead to the enhancement of the DSSC performance. EIS measurements represents the effect of Nb doping on charge transporting and recombination behavior of DSSCs. Moreover, the Nb–TiO2-based DSSCs provide a better power conversion performance as compared to that of the pristine TiO2.",

author = "Wategaonkar, {Sandeep B.} and Parale, {Vinayak G.} and Pawar, {Rani P.} and Mali, {Sawanta S.} and Hong, {Chang Kook} and Powar, {Rohit R.} and Moholkar, {Annasaheb V.} and Park, {Hyung Ho} and Sargar, {Balasaheb M.} and Mane, {Raghunath K.}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea Grant funded by the Government of South Korea ( NRF 2020R1A5A1019131 ), and the Korea Research Fellowship Program through the National Research Foundation of Korea ( NRF ) funded by the Ministry of Science, ICT , and Future Planning ( 2016H1D3A1909289 ) for an outstanding overseas young researcher. Author SBW is thankful to PSM, SSP, and DPN for providing laboratory facilities. Author SBW is thankful to VVG, PSM, SPP, VM, AL and DPN for the research discussion and for providing laboratory facilities. Funding Information: This work was supported by the National Research Foundation of Korea Grant funded by the Government of South Korea (NRF 2020R1A5A1019131), and the Korea Research Fellowship Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT, and Future Planning (2016H1D3A1909289) for an outstanding overseas young researcher. Author SBW is thankful to PSM, SSP, and DPN for providing laboratory facilities. Author SBW is thankful to VVG, PSM, SPP, VM, AL and DPN for the research discussion and for providing laboratory facilities. Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd and Techna Group S.r.l.",

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month = sep,

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doi = "10.1016/j.ceramint.2021.05.284",

language = "English",

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TY - JOUR

T1 - Structural, morphological, and optical studies of hydrothermally synthesized Nb-added TiO2 for DSSC application

AU - Wategaonkar, Sandeep B.

AU - Parale, Vinayak G.

AU - Pawar, Rani P.

AU - Mali, Sawanta S.

AU - Hong, Chang Kook

AU - Powar, Rohit R.

AU - Moholkar, Annasaheb V.

AU - Park, Hyung Ho

AU - Sargar, Balasaheb M.

AU - Mane, Raghunath K.

N1 - Funding Information: This work was supported by the National Research Foundation of Korea Grant funded by the Government of South Korea ( NRF 2020R1A5A1019131 ), and the Korea Research Fellowship Program through the National Research Foundation of Korea ( NRF ) funded by the Ministry of Science, ICT , and Future Planning ( 2016H1D3A1909289 ) for an outstanding overseas young researcher. Author SBW is thankful to PSM, SSP, and DPN for providing laboratory facilities. Author SBW is thankful to VVG, PSM, SPP, VM, AL and DPN for the research discussion and for providing laboratory facilities. Funding Information: This work was supported by the National Research Foundation of Korea Grant funded by the Government of South Korea (NRF 2020R1A5A1019131), and the Korea Research Fellowship Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT, and Future Planning (2016H1D3A1909289) for an outstanding overseas young researcher. Author SBW is thankful to PSM, SSP, and DPN for providing laboratory facilities. Author SBW is thankful to VVG, PSM, SPP, VM, AL and DPN for the research discussion and for providing laboratory facilities. Publisher Copyright: © 2021 Elsevier Ltd and Techna Group S.r.l.

PY - 2021/9/15

Y1 - 2021/9/15

N2 - Herein, titanium dioxide (TiO2) nanoparticles doped with various concentrations (0–7 wt %) of niobium (Nb) are hydrothermally synthesized and used effectively as a photoelectrode for application in dye-sensitized solar cells (DSSCs). The rutile-to-anatase phase transition, accompanied by a change in crystallite size from 23.75 to 9.77 nm, is confirmed via X-ray diffraction (XRD) and Fourier transform (FT)-Raman spectroscopy. In addition, the prepared Nb–TiO2 nanoparticles exhibit a spherical morphology with a mean grain diameter of 43.38–50.69 nm. Further, X-ray photoelectron spectroscopy (XPS) indicates a shift in the Fermi level of the TiO2 towards the conduction band minimum, and an increase in the bandgap from 2.69 to 2.88 eV, with increasing Nb concentration. The resulting increases in the short-circuit current density (JSC) and open circuit voltage (VOC) with the increased injection and conductivity of electrons lead to the enhancement of the DSSC performance. EIS measurements represents the effect of Nb doping on charge transporting and recombination behavior of DSSCs. Moreover, the Nb–TiO2-based DSSCs provide a better power conversion performance as compared to that of the pristine TiO2.

AB - Herein, titanium dioxide (TiO2) nanoparticles doped with various concentrations (0–7 wt %) of niobium (Nb) are hydrothermally synthesized and used effectively as a photoelectrode for application in dye-sensitized solar cells (DSSCs). The rutile-to-anatase phase transition, accompanied by a change in crystallite size from 23.75 to 9.77 nm, is confirmed via X-ray diffraction (XRD) and Fourier transform (FT)-Raman spectroscopy. In addition, the prepared Nb–TiO2 nanoparticles exhibit a spherical morphology with a mean grain diameter of 43.38–50.69 nm. Further, X-ray photoelectron spectroscopy (XPS) indicates a shift in the Fermi level of the TiO2 towards the conduction band minimum, and an increase in the bandgap from 2.69 to 2.88 eV, with increasing Nb concentration. The resulting increases in the short-circuit current density (JSC) and open circuit voltage (VOC) with the increased injection and conductivity of electrons lead to the enhancement of the DSSC performance. EIS measurements represents the effect of Nb doping on charge transporting and recombination behavior of DSSCs. Moreover, the Nb–TiO2-based DSSCs provide a better power conversion performance as compared to that of the pristine TiO2.

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