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Author: david gundlach

Displaying records 41 to 50 of 59 records.
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41. Substrate-dependent interface composition and charge transport in films for organic photovoltaics
Published: 6/9/2009
Authors: David Germack, Calvin Chan, Behrang H Hamadani, Lee J Richter, Daniel A Fischer, David J Gundlach, Dean M DeLongchamp
Abstract: The buried interface composition of polymer-fullerene blends is found by near edge X ray absorption fine structure (NEXAFS) spectroscopy to depend on the surface energy of the substrate upon which they are cast. The interface composition determines ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902284

42. Flexible Solution-Processed Memristors
Published: 6/3/2009
Authors: Nadine Emily Gergel-Hackett, Behrang H Hamadani, B Dunlap, John S Suehle, Curt A Richter, Christina Ann Hacker, David J Gundlach
Abstract: We have fabricated physically flexible nonvolatile memory devices using inexpensive, room-temperature, solution processing. The behavior of these devices is consistent with that of a memristor device, the missing fourth circuit element theoreticall ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900874

43. Semiconducting Thienothiophene Copolymers: Design, Synthesis, Morphology and Performance in Thin Film Organic Transistors
Published: 3/1/2009
Authors: Iain McCulloch, Martin Heeney, Michael L. Chabinyc, Dean M DeLongchamp, Regis J Kline, Michael Colle, Warren Duffy, Daniel A Fischer, David J Gundlach, Behrang H Hamadani, Rick Hamilton, Lee J Richter, Alberto Salleo, Martin Shkunov, David Sparrowe, Steve Tierney, Weimin Zhang
Abstract: Organic semiconductors are emerging as a viable alternative to amorphous silicon in a range of thin film transistor devices. , With the possibility to formulate these p-type materials as inks and subsequently print into patterned devices, organic bas ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854123

44. The molecular basis of mesophase ordering in a thiophene-based copolymer
Published: 2/18/2009
Authors: Dean M DeLongchamp, Regis J Kline, Youngsuk Jung, Eric K Lin, Daniel A Fischer, David J Gundlach, Andrew Moad, Lee J Richter, Michael F. Toney, Martin Heeney, Iain McCulloch
Abstract: The carrier mobility of poly(2,5-bis(3-alkylthiophen-2-yl) thieno[3,2-b]thiophene) semiconductors can be substantially enhanced after heating through a thermotropic mesophase transition, which causes a significant improvement in thin film structural ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852781

45. Surface Potential Imaging of Solution Processable Acene-Based Thin Film Transistors
Published: 12/2/2008
Authors: Lucile C. Teague, Behrang H Hamadani, John E Anthony, David J Gundlach, James G. Kushmerick, Sanker Subramanian, Thomas Jackson, Curt A Richter, Oana Jurchescu
Abstract: We report scanning Kelvin probe microscopy (SKPM) of electrically biased difluoro bis(triethylsilylethynyl) anthradithiophene (diF-TESADT) organic thin film transistors. SKPM reveals the relationship between the diF-TESADT film structure and device ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=831446

46. Organic single crystal field-effect transistors of a soluble anthradithiophene
Published: 10/22/2008
Authors: Oana Jurchescu, Sankar Subramanian, R J Kline, Steven D Hudson, John E Anthony, Thomas Jackson, David J Gundlach
Abstract: We use single crystals (grown by physical vapor transport) of a soluble oligomer to obtain a better understanding of the intrinsic properties, limitations and potential of these materials. Single crystals are well-suited for studies exploring the eff ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32830

47. High Performance Organic Thin-Film Transistors Made Simple Through Molecular Design and Processing
Published: 10/17/2008
Authors: Oana Jurchescu, Marina Feric, Behrang H Hamadani, M. Devin, Sankar Subramanian, Balaji Purushothamanc, John E Anthony, Thomas Jackson, David J Gundlach
Abstract: We report on a simple a method of inducing self-isolation of the thin film transistors via manipulation of the chemical interactions between the organic molecules and the surfaces where they are deposited. We use pentafluorobenzenethiol (PFBT) treatm ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=33146

48. Insights into the Characterization of Polymer-Based Organic Thin-Film Transistors Using Capacitance-Voltage Analysis
Published: 5/21/2008
Authors: Behrang H Hamadani, Curt A Richter, John S Suehle, David J Gundlach
Abstract: Frequency dependent capacitance-voltage characteristics of organic thin-film transistors (OTFTs) based on poly(3-hexylthiophene) (p3HT) as the active polymer layer is investigated. The frequency response of the channel capacitance in accumulation is ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32957

49. Correlation Between Microstructure, Electronic Properties and Ficker Noise in Organic Thin Film Transistors
Published: 3/31/2008
Authors: Oana Jurchescu, Behrang H Hamadani, Hao Xiong, Sungkyu Park, Sankar Subramanian, Neil M Zimmerman, John E Anthony, Thomas Jackson, David J Gundlach
Abstract: We report on observations of a direct correlation between the microstructure of the organic thin films and their electronic properties when incorporated in field-effect transistors. We present a simple method to induce enhanced grain growth in soluti ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32777

50. Contact-induced crystallinity for high-performance soluble acene-based transistors and circuits
Published: 3/8/2008
Authors: David J Gundlach, James E Royer, SK Park, Sankar Subramanian, Oana Jurchescu, Behrang H Hamadani, Andrew Moad, Regis J Kline, LC Teague, Oleg A Kirillov, Curt A Richter, Lee J Richter, Sean R Parkin, Thomas Jackson, JE Anthony
Abstract: The use of organic materials presents a tremendous opportunity to significantly impact the functionality and pervasiveness of large-area electronics. Commercialization of this technology requires reduction in manufacturing costs by exploiting inexpen ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854062



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