Wuersch, Dominik and Hofmann, Felix J. and Eder, Theresa and Aggarwal, A. Vikas and Idelson, Alissa and Hoeger, Sigurd and Lupton, John M. and Vogelsang, Jan (2016) Molecular Water Lilies: Orienting Single Molecules in a Polymer Film by Solvent Vapor Annealing. JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 7 (22). pp. 4451-4457. ISSN 1948-7185,
Full text not available from this repository. (Request a copy)Abstract
The microscopic orientation and position of photoactive molecules is crucial to the operation of optoelectronic devices such as OLEDs and solar cells. Here, we introduce a shape-persistent macrocyclic molecule as an excellent fluorescent probe to simply measure (i) its orientation by rotating the excitation polarization and recording the strength of modulation in photoluminescence (PL) and (ii) its position in a film by analyzing the overall PL brightness at the molecular level. The unique shape, the absorption and the fluorescence properties of this probe yield information on molecular orientation and position. We control orientation and positioning of the probe in a polymer film by solvent vapor annealing (SVA). During the SVA process the molecules accumulate at the polymer/air interface, where they adopt a flat orientation, much like water lilies on the surface of a pond. The results are potentially significant for OLED fabrication and single-molecule spectroscopy (SMS) in general.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | LIGHT-EMITTING-DIODES; CONJUGATED POLYMERS; FLUORESCENCE MICROSCOPY; EXCITON LOCALIZATION; DIPOLE ORIENTATION; DEVICE EFFICIENCY; ENERGY-TRANSFER; THIN-FILMS; SPECTROSCOPY; TRIPLET; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Lupton > Group John Lupton |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 12 Apr 2019 10:22 |
| Last Modified: | 12 Apr 2019 10:22 |
| URI: | https://pred.uni-regensburg.de/id/eprint/3941 |
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