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Patent
Title
Elektrisch leitfaehiges und optisch transparentes Material, Verfahren zu dessen Herstellung und Verwendung desselben
Other Title
Electrically-conductive, optically transparent, oxidic semiconductor material for electrodes, screens, smart windows or adhesives produced in three-dimensional lattice form by condensation of gas phase nanoparticles.
Abstract
Es wird ein elektrisch leitfaehiges und optisch transparentes Material aus einem oxidischen Halbleiter mit grosser Bandluecke beschrieben. Dieses Material besteht aus einem dreidimensionalen poroesen Gitter, das bevorzugt aus miteinander verbundenen Partikeln mit Abmessungen von weniger 100 nm, vorteilhaft weniger als 20 nm gebildet ist. Zweckmaessig besteht das Material aus einzelnen poroesen Aggregaten aus miteinander verbundenen Partikeln, wobei die Aggregateabmessungen von weniger als 500 nm aufweisen sollten. Das Material wird aus jeweils in Uebersaettigung enthaltenen atomaren Gasphasen seiner Elemente in Form von miteinander verbundenen, ein poroeses Gitter bildenden Partikeln kondensiert. Zur Bildung der Aggregate kann das Gitter durch entsprechende mechanische Bearbeitung zerkleinert werden.
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DE 19905125 A UPAB: 20000706 NOVELTY - An electrically conductive and optically transparent material consists of a high bandwidth oxidic semiconductor in the form of a three-dimensional porous lattice. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for the production of the material by condensation of particles from a supersaturated gas phase containing the elements of the material. USE - Claimed uses of the material are in (i) dispersing it in dry form in a polymer and injection molding the product or applying it as a layer on a substrate; (ii) dispersing it together with a binder in a liquid, applying the suspension to a substrate and drying to form an electrically-conductive layer; and (iii) dispersing it in a polymer or an adhesive and using the product as an adhesive. Typical uses are in optically transparent electrodes for solar cells; with glass or polycarbonates as 'smart windows'; as flat image screens, light detectors or sensors; as electrochromic devices; or as electrically-conductive components which can be used without an additional electrically-conductive coating as electromagnetic screens. ADVANTAGE - The material combines electrical conductivity and high porosity (and hence low density) with high optical transparency. Unlike the filler material of DE4228608 it is not itself strongly colored and can thus be colored without any variation or clouding of the desired color.
Inventor(s)
Busmann, H.
Patent Number
1998-19849988
Publication Date
2000
Language
German