Tof-gisans investigation of polymer infiltration in mesoporous TiO 2 films for photovoltaic applications

Gunar Kaune; Martin Haese-Seiller; Reinhard Kampmann; Jean Francois Moulin; Qi Zhong; Peter Müller-Buschbaum

doi:10.1002/polb.21964

Tof-gisans investigation of polymer infiltration in mesoporous TiO ₂ films for photovoltaic applications

Gunar Kaune, Martin Haese-Seiller, Reinhard Kampmann, Jean Francois Moulin, Qi Zhong, Peter Müller-Buschbaum

Chair of Functional Materials

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

35 Scopus citations

Abstract

The structure of porous TiO₂ films and TiO₂: poly(Nvinylcarbazole) (PVK) composite films is investigated with time-offlight grazing incidence small-angle neutron scattering (TOFGISANS). The TiO ₂ films have been prepared by application of a sol-gel process with a diblock copolymer as structure directing agent, and the conductive polymer PVK is infiltrated in the porous network by spin coating and solution casting. The films showa hierarchical pore structurewith mesopores 52 nm in size and additional large macropores with a diameter of about 180 nm. By matching the scattering contrast of the TiO₂ with the polymer information about the penetration of the polymer in the pores is determined. Whereas in the PVK film prepared by solution casting the pores are filled to a high degree; in the spin coated film, PVK wets only the TiO₂ pore walls and forms a solid overlying layer.

Original language	English
Pages (from-to)	1628-1635
Number of pages	8
Journal	Journal of Polymer Science, Part B: Polymer Physics
Volume	48
Issue number	14
DOIs	https://doi.org/10.1002/polb.21964
State	Published - 15 Jul 2010

Keywords

Composites
Conducting polymers
GISANS
Neutron scattering
Titanium dioxide

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1002/polb.21964

Cite this

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title = "Tof-gisans investigation of polymer infiltration in mesoporous TiO 2 films for photovoltaic applications",

abstract = "The structure of porous TiO2 films and TiO2: poly(Nvinylcarbazole) (PVK) composite films is investigated with time-offlight grazing incidence small-angle neutron scattering (TOFGISANS). The TiO 2 films have been prepared by application of a sol-gel process with a diblock copolymer as structure directing agent, and the conductive polymer PVK is infiltrated in the porous network by spin coating and solution casting. The films showa hierarchical pore structurewith mesopores 52 nm in size and additional large macropores with a diameter of about 180 nm. By matching the scattering contrast of the TiO2 with the polymer information about the penetration of the polymer in the pores is determined. Whereas in the PVK film prepared by solution casting the pores are filled to a high degree; in the spin coated film, PVK wets only the TiO2 pore walls and forms a solid overlying layer.",

keywords = "Composites, Conducting polymers, GISANS, Neutron scattering, Titanium dioxide",

author = "Gunar Kaune and Martin Haese-Seiller and Reinhard Kampmann and Moulin, {Jean Francois} and Qi Zhong and Peter M{\"u}ller-Buschbaum",

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AU - Kaune, Gunar

AU - Haese-Seiller, Martin

AU - Kampmann, Reinhard

AU - Moulin, Jean Francois

AU - Zhong, Qi

AU - Müller-Buschbaum, Peter

PY - 2010/7/15

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N2 - The structure of porous TiO2 films and TiO2: poly(Nvinylcarbazole) (PVK) composite films is investigated with time-offlight grazing incidence small-angle neutron scattering (TOFGISANS). The TiO 2 films have been prepared by application of a sol-gel process with a diblock copolymer as structure directing agent, and the conductive polymer PVK is infiltrated in the porous network by spin coating and solution casting. The films showa hierarchical pore structurewith mesopores 52 nm in size and additional large macropores with a diameter of about 180 nm. By matching the scattering contrast of the TiO2 with the polymer information about the penetration of the polymer in the pores is determined. Whereas in the PVK film prepared by solution casting the pores are filled to a high degree; in the spin coated film, PVK wets only the TiO2 pore walls and forms a solid overlying layer.

AB - The structure of porous TiO2 films and TiO2: poly(Nvinylcarbazole) (PVK) composite films is investigated with time-offlight grazing incidence small-angle neutron scattering (TOFGISANS). The TiO 2 films have been prepared by application of a sol-gel process with a diblock copolymer as structure directing agent, and the conductive polymer PVK is infiltrated in the porous network by spin coating and solution casting. The films showa hierarchical pore structurewith mesopores 52 nm in size and additional large macropores with a diameter of about 180 nm. By matching the scattering contrast of the TiO2 with the polymer information about the penetration of the polymer in the pores is determined. Whereas in the PVK film prepared by solution casting the pores are filled to a high degree; in the spin coated film, PVK wets only the TiO2 pore walls and forms a solid overlying layer.

KW - Composites

KW - Conducting polymers

KW - GISANS

KW - Neutron scattering

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