New material type of displays makes production cheaper




Researchers at Penn State research institute in the United States propose to use other transparent metal compounds as conductor at screens than it is now widely used indium tin oxide, or ITO.

The researchers argue in a paper in Nature Materials for the use of materials as strontiumvanadaat, srvo 3, and calciumvanadaat, Cavo 3. These materials are as ito in thin film form transparent, but costs a fraction compared ito. In particular, indium is an expensive material. It is a byproduct of tin, lead, iron and copper mining and difficult ‘loose’ to make out the waste from the processing of ores. With current methods of winning is suspected that there is to mine for some fourteen years to indium.

Despite the constantly recurring promise of carbon nanotubes, which could also serve as a transparent conductor, it is still difficult to produce reliable on a large scale. In this paper the researchers a media type for which the electrostatic interaction between negatively charged electrons is very large compared to their kinetic energy, says Roman Engel-Herbert, one of the researchers. In these materials ‘flow’ of electrons as in a liquid instead of bouncing around, such as in a gas.

A thin film of these materials is also transparent and yet conductive enough. Now it is important to find out what materials have properties that are comparable to those of the strontiumvanadaat and the calciumvanadaat. The costs of the different metals are several times lower than that of indium. Further research is needed to determine how the materials to be produced on a large scale.


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