13 June 2002 Novel structures and optics of p-phenylene thin films on dielectrics and metals
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Proceedings Volume 4642, Organic Photonic Materials and Devices IV; (2002) https://doi.org/10.1117/12.470445
Event: Symposium on Integrated Optoelectronic Devices, 2002, San Jose, California, United States
Abstract
Crystallographic unit cells of vacuum grown ultrathin films of blue-light emitting para-phenylene oligomers on alkali halides, on mica and on Au(111) have been determined via low energy electron diffraction (LEED). On the alkali halides the growth of continuous single crystalline films with either standing or laying molecules dominates. On mica, single-crystalline aggregates (needles) of laying molecules are grown. As the chain length of the molecules increases the mutual order of the needles increases. For p-6P the parallel orientation of the needles is strictly determined by the orientation of surface dipole fields in large dipole domains. A combination of LEED structural results with optical and morphological information from fluorescence microscopy and from atomic force microscopy allows us to deduce subtle details of the organic film aggregates. E.g., bright fluorescence spots could be assigned to nanoscaled gaps in the needles.
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Frank Balzer, Frank Balzer, Horst-Guenter Rubahn, Horst-Guenter Rubahn, } "Novel structures and optics of p-phenylene thin films on dielectrics and metals", Proc. SPIE 4642, Organic Photonic Materials and Devices IV, (13 June 2002); doi: 10.1117/12.470445; https://doi.org/10.1117/12.470445
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