Daniel Frisbie

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The fabrication and characterization of printed ion-gel-gated poly(3hexylthiophene) (P3HT) transistors and integrated circuits is reported, with emphasis on demonstrating both function and performance at supply voltages below 2 V. The key to achieving fast sub-2 V operation is an unusual gel electrolyte based on an ionic liquid and a gelating block(More)
Polycrystalline organic semiconductor films play a central role in organic electronics because their inherent order, relative to amorphous films, facilitates more efficient charge transport. Carrier mobilities in crystalline organic semiconductors are generally at least a factor of one hundred greater than in their amorphous counterparts, which is(More)
The advancement of organic electronics for applications in solar-energy conversion, printed circuitry, displays, and solidstate lighting depends upon the optimization of a variety of organic-semiconductor interfaces. Organic-semiconductor/ insulator (O/I) interfaces, in particular, are critical to the operation of organic thin-film transistors (OTFTs)(More)
A. Mahajan, Dr. W. J. Hyun, Dr. G. A. Rojas, Dr. J.-H. Choi, Prof. L. F. Francis, Prof. C. D. Frisbie Department of Chemical Engineering and Materials Science University of Minnesota 421 Washington Avenue S.E. , Minneapolis MN 55455 , USA E-mail: lfrancis@umn.edu; frisbie@umn.edu Dr. S. B. Walker, Prof. J. A. Lewis School of Engineering and Applied Sciences(More)
Dr. W. J. Hyun, F. Zare Bidoky, Prof. L. F. Francis, Prof. C. D. Frisbie Department of Chemical Engineering and Materials Science University of Minnesota 421 Washington Avenue SE Minneapolis, MN 55455, USA E-mail: lfrancis@umn.edu; frisbie@umn.edu Dr. S. B. Walker, Prof. J. A. Lewis School of Engineering and Applied Sciences Wyss Institute for Biologically(More)
Identifying specific microstructure-property relationships in polycrystalline organic semiconductor films is a key goal for the field of organic electronics. Using transverse shear microscopy, we have established for the first time the presence of both epitaxial and non-epitaxial domains in ultrathin polycrystalline layers of pentacene grown on SiO2. The(More)
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