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  Refractive index and scattering of porous TiO2 films

Abdellatif, S., Sharifi, P., Kirah, K., Ghannam, R., Khalil, A., Erni, D., et al. (2018). Refractive index and scattering of porous TiO2 films. Microporous and Mesoporous Materials, 264, 84-91. doi:10.1016/j.micromeso.2018.01.011.

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Genre: Journal Article

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 Creators:
Abdellatif, S.1, 2, Author
Sharifi, P.3, Author              
Kirah, K.4, Author
Ghannam, R.2, Author
Khalil, A.S.G.5, 6, Author
Erni, D.7, Author
Marlow, F.3, Author              
Affiliations:
1The British University in Egypt (BUE), Cairo, Egypt, ou_persistent22              
2Egypt Nanotechnology Center, Cairo University, Giza, Egypt, ou_persistent22              
3Research Group Marlow, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445612              
4Faculty of Engineering, Ain Shams University, Cairo, Egypt, ou_persistent22              
5Arab Academy for Science, Technology and Maritime Transport, Giza, Egypt, ou_persistent22              
6Physics Department, Faculty of Science, Fayoum University, Fayoum, Egyp, ou_persistent22              
7General and Theoretical Electrical Engineering (ATE), Faculty of Engineering, University of Duisburg-Essen and CENIDE - Center for Nanointegration Duisburg-Essen, Duisburg, Germany, ou_persistent22              

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Free keywords: Porous titanium dioxide; Dye sensitized solar cell;, Refractive index calculation; Scattering; Optical characterization; FDTD simulation
 Abstract: Porous titanium dioxide (TiO2) films are essential components of dye sensitized solar cells (DSSCs) as well as perovskite solar cells (PSCs). Unfortunately, porosity, refractive index, and scattering properties of these films are only roughly known. This induces uncertainties in modelling and understanding of these solar cells. Since the literature provides only descriptions of the optical properties of the porous TiO2 layers with unclear relevance to these solar cells, we investigate porous TiO2 films really used in DSSCs and potentially usable in PSCs. The effective refractive index and the film porosity for different nanostructures that were fabricated from solution-based techniques were determined. The found values are 1.7982 ± 0.005 for the effective refractive index of one kind of TiO2 films and 1.62 ± 0.002 for another one. These values lead to porosities of 53.5% and 65%, respectively. The scattering of the films can be described by a wavelength-independent effective scattering parameter for one film type and by effective scattering particles with a diameter of 46.5 nm for the other film type. The determined porosities are also of relevance for the ionic transport which is functionally crucial in DSSCs and a disturbance in PSCs.

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Language(s): eng - English
 Dates: 2017-05-122018-01-102018-01-112018-07-01
 Publication Status: Published in print
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.micromeso.2018.01.011
 Degree: -

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Title: Microporous and Mesoporous Materials
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 264 Sequence Number: - Start / End Page: 84 - 91 Identifier: ISSN: 1387-1811
CoNE: https://pure.mpg.de/cone/journals/resource/954926228401