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Mesoporous tin-doped indium oxide thin films: effect of mesostructure on electrical conductivity.

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Title: Mesoporous tin-doped indium oxide thin films: effect of mesostructure on electrical conductivity.
Authors: Graberg, Till von1 (AUTHOR), Hartmann, Pascal1 (AUTHOR), Rein, Alexander1 (AUTHOR), Gross, Silvia2 (AUTHOR), Seelandt, Britta3 (AUTHOR), Röger, Cornelia4 (AUTHOR), Zieba, Roman4 (AUTHOR), Traut, Alexander4 (AUTHOR), Wark, Michael3 (AUTHOR), Janek, Jürgen1 (AUTHOR), Smarsly, Bernd M1 (AUTHOR) Bernd.Smarsly@phys.chemie.uni-giessen.de
Source: Science & Technology of Advanced Materials. Mar2011, Vol. 12 Issue 2, p1-N.PAG. 12p.
Subjects: Mesoporous materials, Indium oxide, Thin films, Electric conductivity, Electrodes, Nanoparticles, Prussian blue
Abstract: We present a versatile method for the preparation of mesoporous tin-doped indium oxide (ITO) thin films via dip-coating. Two poly(isobutylene)-b-poly(ethyleneoxide) (PIB-PEO) copolymers of significantly different molecular weight (denoted as PIB-PEO 3000 and PIB-PEO 20000) are used as templates and are compared with non-templated films to clarify the effect of the template size on the crystallization and, thus, on the electrochemical properties of mesoporous ITO films. Transparent, mesoporous, conductive coatings are obtained after annealing at 500 °C; these coatings have a specific resistance of 0.5 Ωcm at a thickness of about 100 nm. Electrical conductivity is improved by one order of magnitude by annealing under a reducing atmosphere. The two types of PIB-PEO block copolymers create mesopores with in-plane diameters of 20-25 and 35—45 nm, the latter also possessing correspondingly thicker pore walls. Impedance measurements reveal that the conductivity is significantly higher for films prepared with the template generating larger mesopores. Because of the same size of the primary nanoparticles, the enhanced conductivity is attributed to a higher conduction path cross section. Prussian blue was deposited electrochemically within the films, thus confirming the accessibility of their pores and their functionality as electrode material. [ABSTRACT FROM AUTHOR]
Copyright of Science & Technology of Advanced Materials is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 70373844
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Mesoporous tin-doped indium oxide thin films: effect of mesostructure on electrical conductivity.
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  Data: We present a versatile method for the preparation of mesoporous tin-doped indium oxide (ITO) thin films via dip-coating. Two poly(isobutylene)-b-poly(ethyleneoxide) (PIB-PEO) copolymers of significantly different molecular weight (denoted as PIB-PEO 3000 and PIB-PEO 20000) are used as templates and are compared with non-templated films to clarify the effect of the template size on the crystallization and, thus, on the electrochemical properties of mesoporous ITO films. Transparent, mesoporous, conductive coatings are obtained after annealing at 500 °C; these coatings have a specific resistance of 0.5 Ωcm at a thickness of about 100 nm. Electrical conductivity is improved by one order of magnitude by annealing under a reducing atmosphere. The two types of PIB-PEO block copolymers create mesopores with in-plane diameters of 20-25 and 35—45 nm, the latter also possessing correspondingly thicker pore walls. Impedance measurements reveal that the conductivity is significantly higher for films prepared with the template generating larger mesopores. Because of the same size of the primary nanoparticles, the enhanced conductivity is attributed to a higher conduction path cross section. Prussian blue was deposited electrochemically within the films, thus confirming the accessibility of their pores and their functionality as electrode material. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Science & Technology of Advanced Materials is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1088/1468-6996/12/2/025005
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 12
        StartPage: 1
    Subjects:
      – SubjectFull: Mesoporous materials
        Type: general
      – SubjectFull: Indium oxide
        Type: general
      – SubjectFull: Thin films
        Type: general
      – SubjectFull: Electric conductivity
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      – SubjectFull: Electrodes
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      – SubjectFull: Nanoparticles
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      – SubjectFull: Prussian blue
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