dc.contributor.author | Martin, Christopher M., 1973- | eng |
dc.contributor.author | Guha, Suchi | eng |
dc.contributor.author | Chandrasekhar, Meera | eng |
dc.contributor.author | Chandrasekhar, Holalkere R. | eng |
dc.contributor.author | Guentner, R. | eng |
dc.contributor.author | De Freitas, P. Scanduicci | eng |
dc.contributor.author | Scherf, Ullrich | eng |
dc.date.issued | 2003 | eng |
dc.description | DOI: 10.1103/PhysRevB.68.115203 http://link.aps.org/doi/10.1103/PhysRevB.68.115203 | eng |
dc.description.abstract | We present studies of the photoluminescence (PL), absorption, and Raman scattering spectra from poly[2,7-(9,9′-bis(2-ethylhexyl))fluorene] under hydrostatic pressures of 0-100 kbar at room temperature. The well-defined PL and associated vibronics that are observed at atmospheric pressure change dramatically around 20 kbar in the bulk sample and at around 35 kbar for the thin-film sample. Beyond these pressures the PL emission from the backbone is swamped by strong peaks due to aggregates and keto defects in the 2.1-2.6 eV region. The Raman peaks shift to higher energies and exhibit unexpected antiresonance line shapes at higher pressures, indicating a strong electron-phonon interaction. | eng |
dc.description.sponsorship | S.G. acknowledges the donors of the American Chemical Society Petroleum Research Fund No. 38193-B7! for partial support of this research. U.S. thanks SONY International Europe, Stuttgart, and the Deutsche Forschungsgemeinschaft (DFG) for financial support. | eng |
dc.identifier.citation | Phys. Rev. B 68, 115203 (2003) | eng |
dc.identifier.issn | 1098-0121 | eng |
dc.identifier.uri | http://hdl.handle.net/10355/7259 | eng |
dc.language | English | eng |
dc.publisher | American Physical Society | eng |
dc.relation.ispartofcollection | University of Missouri--Columbia. College of Arts and Sciences. Department of Physics and Astronomy. Physics and Astronomy publications | eng |
dc.subject | crystallographic aspects of phase transformations | eng |
dc.subject | pressure effects | eng |
dc.subject.lcsh | Crystallography | eng |
dc.subject.lcsh | Polymers | eng |
dc.subject.lcsh | Organic compounds | eng |
dc.title | Hydrostatic pressure dependence of the luminescence and Raman frequencies in polyfluorene | eng |
dc.type | Article | eng |