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http://acervodigital.unesp.br/handle/11449/40358- Title:
- Exciton formation in dye doped OLEDs using electrically detected magnetic resonance
- Universidade Estadual Paulista (UNESP)
- 0277-786X
- Electrically Detected Magnetic Resonance (EDMR) was used to investigate the influence of dye doping molecules on spin-dependent exciton formation in Aluminum (III) 8-hydroxyquinoline (Alq(3)) based OLEDs with different device structures and temperature ranges. 4-(dicyanomethylene)-2-methyl-6-{2-[(4-diphenylamino-phenyl]ethyl}-4H-pyran (DCM-TPA) and 5,6,11,12-tetraphenylnaphthacene (Rubrene) were used as dopants. A strong temperature dependence have been observed for doped OLEDs, with a decrease of two orders of magnitude in EDMR signal for temperatures above similar to 200 K. The signal temperature dependence were fitted supposing different spin-lattice relaxation processes. The results suggest that thermally activated vibrations of dopants molecules induce spin pair dissociation, reducing the signal.
- 1-Jan-2011
- Photonics and Optolectronics Meetings (poem) 2011: Optoelectronic Devices and Integration. Bellingham: Spie-int Soc Optical Engineering, v. 8333, p. 7, 2011.
- 7
- Spie - Int Soc Optical Engineering
- Alq3
- dye doped OLEDs
- DCM-TPA
- Rubrene
- EDMR
- spin-relaxation processes
- http://dx.doi.org/10.1117/12.918246
- Acesso restrito
- outro
- http://repositorio.unesp.br/handle/11449/40358
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