Carrier mobility in pentacene as a function of grain size and orientation derived from scanning transmission X-ray microscopy
| Autor: | Tolek Tyliszczak, Björn Bräuer, Andreas Fognini, Ajay Virkar, Zhenan Bao, Hylke B. Akkerman, Roopali Kukreja |
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| Rok vydání: | 2011 |
| Předmět: |
Electron mobility
Materials science Analytical chemistry General Chemistry Scanning transmission X-ray microscopy Condensed Matter Physics Grain size Electronic Optical and Magnetic Materials Biomaterials Pentacene chemistry.chemical_compound Membrane chemistry Silicon nitride Microscopy Materials Chemistry Surface roughness Electrical and Electronic Engineering |
| Zdroj: | Organic Electronics. 12:1936-1942 |
| ISSN: | 1566-1199 |
| DOI: | 10.1016/j.orgel.2011.08.007 |
| Popis: | Pentacene field-effect transistors were prepared on silicon nitride membranes for scanning transmission X-ray microscopy (STXM) investigations. The membranes were modified by different self-assembled monolayers (SAMs). Pentacene was deposited atop the SAM-treated membrane and the in-plane orientation of the grains were subsequently investigated by polarization dependent STXM measurements. The grain sizes were determined and compared to those obtained from atomic force microscopy (AFM) measurements. Statistical analysis of the grain orientation was correlated with the charge carrier mobility of the films, in which we observed an increase in the mobility with increasing grain size and decreasing surface roughness of the SAM. |
| Databáze: | OpenAIRE |
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