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Displaying records 41 to 48.
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41. Terahertz Mobility Measurements on P3HT Films: Device Comparison, Molecular Weight and Film Processing Effects
Topic: Semiconductor Materials
Published: 1/17/2008
Authors: Okan Esenturk, Joseph S Melinger
Abstract: We report the first direct comparison of relative carrier mobilities in semiconducting organic polymer films measured using non-contact optical pump terahertz probe spectroscopy to those reported in electrical device studies. Relative transient sign ...

42. The molecular basis of mesophase ordering in a thiophene-based copolymer
Topic: Semiconductor Materials
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 ...

43. Thermo-Mechanical Characterization of Au‹In Transient Liquid Phase Bonding Die-Attach
Topic: Semiconductor Materials
Published: 4/9/2013
Authors: Brian Joseph Grummel, Habib A Mustain, Z. John Shen, Allen R Hefner Jr.
Abstract: In next-generation wide-bandgap power electronics, the semiconductor device die-attach is of critical importance, for this transient liquid phase (TLP) bonding is a promising and effective die-attach technique. In this work, the thermal and mechanica ...

44. Towards Discrete Axial p-n Junction Nanowire LEDs Grown by Plasma-Assisted MBE
Topic: Semiconductor Materials
Published: 3/6/2013
Author: Matthew David Brubaker
Abstract: In this paper we investigate axial p-n junction GaN nanowires grown by plasma-assisted MBE, with particular attention to the effect of Mg doping on the device characteristics of individual nanowire LEDs. We observe that single-nanowire LEDs produce ...

45. Transient mobility in silicon as seen by a combination of free-carrier absorption and resonance-coupled photoconductive decay
Topic: Semiconductor Materials
Published: 3/12/2013
Authors: Ari D Feldman, John H Lehman, Richard K. Ahrenkiel
Abstract: The combination of the resonance-coupled photoconductive decay (RCPCD) apparatus and a pump-probe free carrier absorption experiment results in a method of viewing transient mobility. RCPCD uses an Nd:YAG laser operating at 1064 nm to pump the p-ty ...

46. Vertically Segregated Structure and Properties of small molecule-polymer blend semiconductors for organic thin film transistors
Topic: Semiconductor Materials
Published: 8/27/2012
Authors: Nayool Shin, Dean M DeLongchamp, Jihoon Kang, Regis J Kline, Lee J Richter, Vivek M Prabhu, Balaji Purushothamanc, John E Anthony, Do Y Yoon
Abstract: The phase-segregated structure and the electrical properties of thin film blends of the small-molecule semiconductor fluorinated 5,11-bis(triethylsilylethynyl) anthradithiophene with insulating binder polymers were studied for organic thin film trans ...

47. X-Ray Micro-Beam Diffraction Determination of Full Stress Tensors in Cu TSVs
Topic: Semiconductor Materials
Published: 5/28/2013
Authors: Chukwudi Azubuike Okoro, Lyle E Levine, Oleg A Kirillov, Yaw S Obeng, Ruqing Xu, Jonathan Z Tischler, Wenjun Liu, Klaus Hummler
Abstract: We report the first non-destructive, depth resolved determination of the full stress tensor in Cu through-silicon vias (TSVs), using synchrotron based micro-beam X-ray diffraction. Two adjacent Cu TSVs were studied; one deliberately capped with SiO2, ...

48. Zone-Refinement Effect in Small Molecule‹Polymer Blend Semiconductors for Organic Thin Film Transistors
Topic: Semiconductor Materials
Published: 12/14/2010
Authors: Yeon Sook Chung, Nayool Shin, Jihoon Kang, Youngeun Jo, Vivek M Prabhu, Regis J Kline, John E Anthony, Do Y Yoon
Abstract: The blend films of small molecule semiconductors with insulating polymers exhibit not only an excellent solution processability, but also superior performance characteristics (field-effect mobility, on/off ratio, threshold voltage and stability) over ...

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