NDLI: Structural and optical properties of sol-gel deposited proton conducting Ta$_{2}$O$

Content Provider	SpringerLink
Author	Ozer, Nilgun Lampert, Carl M.
Copyright Year	1997
Abstract	Proton conducting tantalum oxide films were deposited on ITO (Indium Tin Oxide) coated glass, fused silica and soda-lime glass substrates by spin coating using a sol-gel process. The coating solutions were prepared using Ta(OC$_{2}$H$_{5}$)$_{5}$ as a precursor. X-ray diffraction studies determined that the sol-gel films, heat treated at temperatures below 400°C, were amorphous. Films heat treated at higher temperatures were crystalline with the hexagonal δ-Ta$_{2}$O$_{5}$ structure. The solar transmission values (T $_{ s }$) of tantala films on glass generally range from 0.8–0.9, depending on thickness. The refractive index and the extinction coefficient were evaluated from transmittance characteristics in the UV-VIS-NIR regions. The refractive index values calculated at λ=550 nm increased fromn=1.78 to 1.97 with increasing heat treatment from 150 to 450°C. The films heat treated at different temperatures showed low absorption, with extinction coefficients of smaller thank=1×10$^{−3}$ in the visible range. Impedance spectroscopic investigations performed on Ta$_{2}$O$_{5}$ films revealed that these films have a protonic conductivity of 3.2×10$^{−4}$S/m. The films are suitable for proton conducting layers in electrochromic (EC) devices.
Starting Page	703
Ending Page	709
Page Count	7
File Format	PDF
ISSN	09280707
Journal	Journal of Sol-Gel Science and Technology
Volume Number	8
Issue Number	1-3
e-ISSN	15734846
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	1997-01-01
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	optical properties proton conductor tantalum oxide electrochromic devices Inorganic Chemistry Optical and Electronic Materials Nanotechnology Ceramics, Glass, Composites, Natural Methods
Content Type	Text
Resource Type	Article
Subject	Biomaterials Electronic, Optical and Magnetic Materials Condensed Matter Physics Ceramics and Composites Materials Chemistry Chemistry

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