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Digitale Medien

WO〈sub〉3〈/sub〉 Thin Films Active in the IR Region (2008)

Sauvet, Katherine ; Sauques, Laurent ; Durand, Olivier ; [weitere]

s.l. ; Stafa-Zurich, Switzerland

Advances in science and technology Vol. 55 (Sept. 2008), p. 30-35

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ISSN: 1662-0356

Quelle: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008

Thema: Allgemeine Naturwissenschaft , Technik allgemein

Notizen: This paper reports the enhancement of the electrochromic properties in the infrared, IR,region of radio frequency sputtered WO3 thin films thanks to a careful optimization of thedeposition conditions. From the combination of various techniques of characterization, the opticalperformances, in particular, the contrast in reflectance between the inserted state and the deinsertedone, upon cycling in H3PO4 liquid electrolyte, are correlated to the film morphology andcomposition. Films, grown in higher chamber pressure, exhibiting a lower density and a O/W ratiohigher than 3, show the most promising behavior. Finally, first trends on the incorporation of theWO3 single layer in full electrochromic devices are discussed

Materialart: Digitale Medien

URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/42/transtech_doi~10.4028%252Fwww.scientific.net%252FAST.55.30.pdf

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Digitale Medien

Crystallization of textured PbTiO3 films deposited from gels (1994)

Guzmán, Guillermo ; Barboux, Philippe ; Livage, Jacques ; [weitere]

Springer

Journal of sol gel science and technology 2 (1994), S. 619-622

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Details

ISSN: 1573-4846

Schlagwort(e): orientation ; films ; sol-gel ; PbTiO3 ; gels

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie

Notizen: Abstract Sol-gel processed PbTiO3 thin films have been deposited by spin coating onto different subtrates; Si[111], Si/Al, Si/SiO2/Cr/Pt, MgO[100], SrTiO3[100] and sapphire. Interactions between the substrate and PbTiO3 films after heat treatment have been studied by X-ray diffraction and Rutherford Back Scattering. When deposited onto sapphire and Si[111], PbTiO3 films exhibit a preferred orientation with (101) perpendicular to the substrate. These films become oriented along (100) onto MgO and (001) onto SrTiO3[100] substrates. A strong channelling effect is observed by the RBS technique when the film is oriented along the c axis on SrTiO3[100] suggesting that these films are epitaxially grown. The diffusion of metal atoms during the thermal treatment gives rise to the formation of lead silicate on Si[111] substrates. As a result a pyrochlore phase is formed. Lead titanate films on Si/SiO2/Cr/Pt and Si/Al substrates are polycrystalline and do not exhibit any texture.