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April 22nd, 2008
Oregon State University has had a comprehensive program developing printed oxide electronics and electro-optics for some years. The latest progress was revealed by Douglas A. Keszler Department of Chemistry OSUMI Oregon State University at the IDTechEx Printed Electronics Europe event in Dresden Germany this month.
Collaboration and funding comes from Hewlett Packard, Inpria Corp., DARPA, The Air Force Research Laboratory, SNNI and Oregon Nanoscience and Microtechnologies Institute.
One advantage of this technology is transparency and three of the researchers have written a book on Transparent Electronics published by Springer. The electronic properties of inorganic compound layers can be superior to those of organic layers by a factor of ten or more, though the test devices reported here usually have mobilities similar to the best organic semiconductors not yet commercialised ie a few cm2/vs. With inorganic oxide transistor semiconductors and dielectrics, the challenge lies in printing what is, in effect, pottery and the OSU approach does not follow the usual route of creating fine powders in order to do this. So called subcolloidal precursor chemistries are used.
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