Baird, Douglas L. and Nahlawi, Adnan and Crossley, Kenneth and van Schooten, Kipp J. and Teferi, Mandefro Y. and Popli, Henna and Joshi, Gajadhar and Jamali, Shirin and Malissa, Hans and Lupton, John M. and Boehme, Christoph (2020) Electric Field Effects on Photoluminescence-Detected Magnetic Resonance of a pi-Conjugated Polymer. PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, 257 (5): 1900493. ISSN 0370-1972, 1521-3951
Full text not available from this repository. (Request a copy)Abstract
Electric fields are central to the operation of optoelectronic devices based on conjugated polymers as they drive the recombination of electrons and holes to excitons in organic light-emitting diodes but are also responsible for the dissociation of excitons in solar cells. One way to track the microscopic effect of electric fields on charge carriers formed under illumination of a polymer film is to exploit the fluorescence arising from delayed recombination of carrier pairs, a process which is fundamentally spin dependent. Such spin-dependent recombination can be probed directly in fluorescence, by optically detected magnetic resonance (ODMR). It is found that the ODMR signal in a polymer film is quenched in an electric field in the absence of a current, but that, at fields exceeding 1 MV cm(-1), this quenching saturates at a level of at most 50%.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | MEH-PPV; ASSISTED DISSOCIATION; FLUORESCENCE; EXCITON; FILMS; RECOMBINATION; POLYFLUORENE; EXCITATIONS; DYNAMICS; POLARON; optically detected magnetic resonance; photoluminescence; poly[2-methoxy-5-(2'-ethylhexyloxy)-p-phenylene vinylene]; electric field effects |
| 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: | 09 Apr 2021 11:43 |
| Last Modified: | 09 Apr 2021 11:43 |
| URI: | https://pred.uni-regensburg.de/id/eprint/45553 |
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