Controlled growth of hematite (α-Fe2O3) nanorod array on fluorine doped tin oxide: Synthesis and photoelectrochemical properties

H. K. Mulmudi; N. Mathews; X. C. Dou; L. F. Xi; S. S. Pramana; Y. M. Lam; S. G. Mhaisalkar

doi:10.1016/j.elecom.2011.06.008

Controlled growth of hematite (α-Fe₂O₃) nanorod array on fluorine doped tin oxide: Synthesis and photoelectrochemical properties

H. K. Mulmudi, N. Mathews^*, X. C. Dou, L. F. Xi, S. S. Pramana, Y. M. Lam, S. G. Mhaisalkar

^*Corresponding author for this work

Nanyang Technological University

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

87 Citations (Scopus)

Abstract

Hematite nanorods were grown on fluorine doped tin oxide (FTO) substrates by hydrothermal means utilizing urea as a pH regulating agent. XRD for nanorods revealed pure hematite phase after annealing at 500 °C for 30 min with preferential orientation in the [110] direction. Electrochemical impedance spectroscopy was carried out to investigate the electrical properties. Using Mott-Schottky analysis, charge carrier density was estimated to be 5.62 × 10¹⁹ cm^{- 3} in the hematite nanorod array. Among the nanostructures, the n-type hematite nanorod array showed the best conversion efficiency among the samples studied in a two electrode photoelectrochemical cell. Photocurrent measurements versus light intensity were performed to investigate the device performance and the limiting factors to the performance were attributed to the short diffusion length of minority charge carriers.

Original language	English
Pages (from-to)	951-954
Number of pages	4
Journal	Electrochemistry Communications
Volume	13
Issue number	9
DOIs	https://doi.org/10.1016/j.elecom.2011.06.008
Publication status	Published - Sept 2011
Externally published	Yes

ASJC Scopus Subject Areas

Electrochemistry

Keywords

Electrochemical impedance spectroscopy
Hematite nanorods
Minority charge carriers
Photoelectrochemical solar cell

Access to Document

10.1016/j.elecom.2011.06.008

Cite this

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title = "Controlled growth of hematite (α-Fe2O3) nanorod array on fluorine doped tin oxide: Synthesis and photoelectrochemical properties",

abstract = "Hematite nanorods were grown on fluorine doped tin oxide (FTO) substrates by hydrothermal means utilizing urea as a pH regulating agent. XRD for nanorods revealed pure hematite phase after annealing at 500 °C for 30 min with preferential orientation in the [110] direction. Electrochemical impedance spectroscopy was carried out to investigate the electrical properties. Using Mott-Schottky analysis, charge carrier density was estimated to be 5.62 × 1019 cm- 3 in the hematite nanorod array. Among the nanostructures, the n-type hematite nanorod array showed the best conversion efficiency among the samples studied in a two electrode photoelectrochemical cell. Photocurrent measurements versus light intensity were performed to investigate the device performance and the limiting factors to the performance were attributed to the short diffusion length of minority charge carriers.",

keywords = "Electrochemical impedance spectroscopy, Hematite nanorods, Minority charge carriers, Photoelectrochemical solar cell",

author = "Mulmudi, {H. K.} and N. Mathews and Dou, {X. C.} and Xi, {L. F.} and Pramana, {S. S.} and Lam, {Y. M.} and Mhaisalkar, {S. G.}",

year = "2011",

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doi = "10.1016/j.elecom.2011.06.008",

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T2 - Synthesis and photoelectrochemical properties

AU - Mulmudi, H. K.

AU - Mathews, N.

AU - Dou, X. C.

AU - Xi, L. F.

AU - Pramana, S. S.

AU - Lam, Y. M.

AU - Mhaisalkar, S. G.

PY - 2011/9

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N2 - Hematite nanorods were grown on fluorine doped tin oxide (FTO) substrates by hydrothermal means utilizing urea as a pH regulating agent. XRD for nanorods revealed pure hematite phase after annealing at 500 °C for 30 min with preferential orientation in the [110] direction. Electrochemical impedance spectroscopy was carried out to investigate the electrical properties. Using Mott-Schottky analysis, charge carrier density was estimated to be 5.62 × 1019 cm- 3 in the hematite nanorod array. Among the nanostructures, the n-type hematite nanorod array showed the best conversion efficiency among the samples studied in a two electrode photoelectrochemical cell. Photocurrent measurements versus light intensity were performed to investigate the device performance and the limiting factors to the performance were attributed to the short diffusion length of minority charge carriers.

AB - Hematite nanorods were grown on fluorine doped tin oxide (FTO) substrates by hydrothermal means utilizing urea as a pH regulating agent. XRD for nanorods revealed pure hematite phase after annealing at 500 °C for 30 min with preferential orientation in the [110] direction. Electrochemical impedance spectroscopy was carried out to investigate the electrical properties. Using Mott-Schottky analysis, charge carrier density was estimated to be 5.62 × 1019 cm- 3 in the hematite nanorod array. Among the nanostructures, the n-type hematite nanorod array showed the best conversion efficiency among the samples studied in a two electrode photoelectrochemical cell. Photocurrent measurements versus light intensity were performed to investigate the device performance and the limiting factors to the performance were attributed to the short diffusion length of minority charge carriers.

KW - Electrochemical impedance spectroscopy

KW - Hematite nanorods

KW - Minority charge carriers

KW - Photoelectrochemical solar cell

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