P-Channel Organic Semiconductors Based on Hybrid Acene-Thiophene Molecules for Thin-Film Transistor Applications.
We report the structural and electrical characterization of two new p-channel organic semiconductors, 5, 5'-bis(2-tetracenyl)-2,2'-bithiophene (1) and 5,5'-bis(2-anthracenyl)-2,2'-bithiophene (2). Both compounds exhibited a high degree of thermal stability with decomposition temperatures of 530°C an...
| Publicado en: | Journal of the American Chemical Society Vol. 127; no. 11; pp. 3997 - 4010 |
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| Autores principales: | , , , , , , , |
| Formato: | Artículo |
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American Chemical Society
3/23/2005
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| Materias: | |
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=hlh&AN=16556921&site=ehost-live header: @attributes: shortDbName: hlh uiTerm: 16556921 longDbName: Humanities International Complete uiTag: AN controlInfo: bkinfo: jinfo: jid: 00027863 ACS jtl: Journal of the American Chemical Society issn: 00027863 maglogo: N pubinfo: dt: 3/23/2005 vid: 127 iid: 11 pid: 997 pub: American Chemical Society artinfo: ui: 16556921 10.1021/ja044078h ppf: 3997 ppct: 13 formats: tig: atl: P-Channel Organic Semiconductors Based on Hybrid Acene-Thiophene Molecules for Thin-Film Transistor Applications. aug: au: Merlo, Jeffrey A. Newman, Christopher R. Gerlach, Christopher P. Kelley, Tommie W. Muyres, Dawn V. Fritz, Sandra E. Toney, Michael F. Frisbie, C. Daniel affil: Department of Chemical Engineering and Materials Science, University of Minnesota, 42/ Washington Avenue SE, Minneapolis, Minnesota 55455. 3M Company, Corporate Research Materials Laboratory St. Paul, Minnesota 55144. Stanford Synchrotron Radiation Laboratory, Stanford Linear Accelerator Center, 2575 Sand Hill Road, M/S 69, Menlo Park, California 94025. su: Semiconductors Solid state electronics Optical diffraction Atomic force microscopy Filmstrips Temperature measurements sug: subj: Semiconductors Solid state electronics Optical diffraction Atomic force microscopy Filmstrips Temperature measurements ab: We report the structural and electrical characterization of two new p-channel organic semiconductors, 5, 5'-bis(2-tetracenyl)-2,2'-bithiophene (1) and 5,5'-bis(2-anthracenyl)-2,2'-bithiophene (2). Both compounds exhibited a high degree of thermal stability with decomposition temperatures of 530°C and 425°C for 1 and 2, respectively. The thin-film structures of 1 and 2 were examined using wide-angle X-ray diffraction (XRD), grazing incidence X-ray diffraction (GIXD), and atomic force microscopy (AFM). Films of 1 and 2 pack in similar triclinic unit cells with the long axes of the molecules nearly perpendicular to the substrate. Thin-film transistors (TFT5) based on 1 and 2 exhibit contact-corrected linear regime hole mobility as high as 0.5 cm²/Vs and 0.1 cm²/Vs, respectively. The specific contact resistance at high gate voltages for gold top contacts was 2 × 10 Ω cm and 3 × 10 Ω cm for 35 nm thick films of 1 and 2, respectively. Long-term air stability tests revealed less degradation of the electrical properties of 1 and 2 in comparison to pentacene. Variable temperature measurements revealed activation energies as low as 22 and 27 meV for 1 and 2, respectively. The temperature and gate voltage dependence of the mobility are discussed in terms of a double exponential distribution of trap states and a model accounting for the layered structure of the organic films. The enhanced air and thermal stability over pentacene, combined with good electrical performance characteristics, make 2 a promising candidate for future organic TFT applications. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: Y dt: @attributes: year: 2005 holdings: @attributes: islocal: N |
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