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You searched on: Author: david gundlach

Displaying records 51 to 60 of 66 records.
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51. 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 ...

52. 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 ...

53. 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 ...

54. 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 ...

55. 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 ...

56. 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 ...

57. 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 ...

58. Contact Induced Crystallinity for High Performance Soluble Acene-Based TFTs
Published: 2/17/2008
Authors: David J Gundlach, James Royer, Behrang H Hamadani, Lucile C. Teague, Andrew J Moad, Oana Jurchescu, Oleg A Kirillov, Lee J Richter, James G. Kushmerick, Curt A Richter, Sungkyu Park, Thomas Jackson, Sankar Subramanian, John E Anthony
Abstract: Organic electronics present a tremendous opportunity to significantly impact the functionality and pervasiveness of large-area electronics. However, the lack of low-temperature low-cost deposition and patterning techniques limits the potential for th ...

59. Undoped polythiophene FETs with field-effect mobility of 1 cm^2 V^-1 s^-1
Published: 12/29/2007
Authors: Behrang H Hamadani, Iain McCulloch, Martin Heeney, David J Gundlach
Abstract: We report on charge transport in organic field-effect transistors based on (2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene) as the active polymer layer with saturation field-effect mobilities as large as 1 cm2 V-1 s-1. The dependence of mob ...

60. Distinguishing Between Nonlinear Channel Transport and Contact Effects in Organic FETs
Published: 8/30/2007
Authors: Behrang H Hamadani, Jeremy LeBoeuf, R J Kline, Iain McCulloch, Martin Heeney, Curt A Richter, Lee J Richter, David J Gundlach
Abstract: We investigate charge injection and transport in organic field-effect transistors fabricated by using poly(2,5-bis(3-tetradecylthiophene-2-yl)thieno[3,2-b]thiophene) (pBTTT-C14) as the active polymer layer. We show that in high mobility devices where ...

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