Accession Number : ADA563572


Title :   Polymeric and Molecular Materials for Advanced Organic Electronics


Descriptive Note : Final rept. 15 Jun 2008-30 Nov 2012


Corporate Author : NORTHWESTERN UNIV EVANSTON IL DEPT OF CHEMISTRY


Personal Author(s) : Marks, Tobin J ; Facchetti, Antonio ; Dodabalapur, Ananth


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a563572.pdf


Report Date : 25 Jul 2011


Pagination or Media Count : 21


Abstract : During the project period, we made strong progress in: I) organic semiconductors, 2) gate dielectrics, and 3) fundamental studies of charge transport. In 1), we expanded our understanding of the architectural and electronic structure requirements for n-type semiconductors and the role grain boundaries play in transport. To accomplish this, we developed new synthetic routes to processable small molecules and polymers, and characterized/optimized structural, electronic, and processing properties. In 2), we expanded the SAND (self-assembled nanodielectric) concept to vapor-deposited (V-SAND) and to spin-coated. printable variants. All have excellent dielectric and insulating properties, a remarkable ability to minimize trapped charge between thin film transistor dielectric and semiconductor layers, and because of the high capacitances, lowe red transistor operating voltages. These characteristics enable many new types of devices with outstanding performance, such as transparent and flexible transistors. In 3), we showed via variable-temperature studies that transport mechanisms involve multiple trapping and release mechanisms which are sensitive to the semiconductor film processing and the gate dielectric.


Descriptors :   *ELECTRONICS , *ORGANIC MATERIALS , CAPACITANCE , DIELECTRICS , GATES(CIRCUITS) , GRAIN BOUNDARIES , MOLECULES , N TYPE SEMICONDUCTORS , POLYMERS , RELEASE MECHANISMS , REQUIREMENTS , SEMICONDUCTING FILMS , SEMICONDUCTORS , SENSITIVITY , THIN FILMS , TRANSISTORS , TRAPPING(CHARGED PARTICLES) , VAPOR DEPOSITION , VOLTAGE


Subject Categories : Electrical and Electronic Equipment


Distribution Statement : APPROVED FOR PUBLIC RELEASE