Hydrothermal and microwave fabrication of ZnO nanorods using ethanolic quantum dot precursors

Yukihiro Hara, Jeffrey Brownson, Marc A. Anderson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

ZnO is a promising material for composite photovoltaic solar cells due to the material's n-type character, wide band gap (3.2 eV), and favorable position of the conduction band relative to the excited states of interfacial light sensitizers. Visible light sensitizers may be organic dyes or inorganic semiconductors. ZnO nanorods were synthesized from base-modified ethanolic suspensions of ZnO quantum dots. The particles were coarsened using a conventional hydrothermal method or microwave treatment, each in high-pressure vessels. Microwave treatment allowed shorter reaction times than conventional thermal methods, and also resulted in nanorod morphologies. Powders of the ZnO nanorods were characterized by XRD, FTIR, SEM, thermal analysis, and nitrogen absorption. The rods were found to be highly asymmetric, with particle size and degree of asymmetry influenced by zinc and hydroxyl concentrations in the precursor suspensions. Porous films were deposited and analyzed on transparent conductive oxides to determine photocurrent onset potentials relative to SCE.

Original languageEnglish (US)
Title of host publication233rd ACS National Meeting, Abstracts of Scientific Papers
StatePublished - Dec 28 2007
Event233rd ACS National Meeting - Chicago, IL, United States
Duration: Mar 25 2007Mar 29 2007

Publication series

NameACS National Meeting Book of Abstracts
ISSN (Print)0065-7727

Other

Other233rd ACS National Meeting
CountryUnited States
CityChicago, IL
Period3/25/073/29/07

Fingerprint

Nanorods
Semiconductor quantum dots
Microwaves
Fabrication
Suspensions
Conduction bands
Pressure vessels
Photocurrents
Excited states
Hydroxyl Radical
Powders
Oxides
Thermoanalysis
Zinc
Solar cells
Energy gap
Coloring Agents
Nitrogen
Dyes
Particle size

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Hara, Y., Brownson, J., & Anderson, M. A. (2007). Hydrothermal and microwave fabrication of ZnO nanorods using ethanolic quantum dot precursors. In 233rd ACS National Meeting, Abstracts of Scientific Papers (ACS National Meeting Book of Abstracts).
Hara, Yukihiro ; Brownson, Jeffrey ; Anderson, Marc A. / Hydrothermal and microwave fabrication of ZnO nanorods using ethanolic quantum dot precursors. 233rd ACS National Meeting, Abstracts of Scientific Papers. 2007. (ACS National Meeting Book of Abstracts).
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Hara, Y, Brownson, J & Anderson, MA 2007, Hydrothermal and microwave fabrication of ZnO nanorods using ethanolic quantum dot precursors. in 233rd ACS National Meeting, Abstracts of Scientific Papers. ACS National Meeting Book of Abstracts, 233rd ACS National Meeting, Chicago, IL, United States, 3/25/07.

Hydrothermal and microwave fabrication of ZnO nanorods using ethanolic quantum dot precursors. / Hara, Yukihiro; Brownson, Jeffrey; Anderson, Marc A.

233rd ACS National Meeting, Abstracts of Scientific Papers. 2007. (ACS National Meeting Book of Abstracts).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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N2 - ZnO is a promising material for composite photovoltaic solar cells due to the material's n-type character, wide band gap (3.2 eV), and favorable position of the conduction band relative to the excited states of interfacial light sensitizers. Visible light sensitizers may be organic dyes or inorganic semiconductors. ZnO nanorods were synthesized from base-modified ethanolic suspensions of ZnO quantum dots. The particles were coarsened using a conventional hydrothermal method or microwave treatment, each in high-pressure vessels. Microwave treatment allowed shorter reaction times than conventional thermal methods, and also resulted in nanorod morphologies. Powders of the ZnO nanorods were characterized by XRD, FTIR, SEM, thermal analysis, and nitrogen absorption. The rods were found to be highly asymmetric, with particle size and degree of asymmetry influenced by zinc and hydroxyl concentrations in the precursor suspensions. Porous films were deposited and analyzed on transparent conductive oxides to determine photocurrent onset potentials relative to SCE.

AB - ZnO is a promising material for composite photovoltaic solar cells due to the material's n-type character, wide band gap (3.2 eV), and favorable position of the conduction band relative to the excited states of interfacial light sensitizers. Visible light sensitizers may be organic dyes or inorganic semiconductors. ZnO nanorods were synthesized from base-modified ethanolic suspensions of ZnO quantum dots. The particles were coarsened using a conventional hydrothermal method or microwave treatment, each in high-pressure vessels. Microwave treatment allowed shorter reaction times than conventional thermal methods, and also resulted in nanorod morphologies. Powders of the ZnO nanorods were characterized by XRD, FTIR, SEM, thermal analysis, and nitrogen absorption. The rods were found to be highly asymmetric, with particle size and degree of asymmetry influenced by zinc and hydroxyl concentrations in the precursor suspensions. Porous films were deposited and analyzed on transparent conductive oxides to determine photocurrent onset potentials relative to SCE.

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M3 - Conference contribution

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Hara Y, Brownson J, Anderson MA. Hydrothermal and microwave fabrication of ZnO nanorods using ethanolic quantum dot precursors. In 233rd ACS National Meeting, Abstracts of Scientific Papers. 2007. (ACS National Meeting Book of Abstracts).