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Sano-Tachiya-Noolandi-Hong, Onsager and Braun models vs Monte Carlo simulation of charge photogeneration in organic solids
Abstrakt
The Sano-Tachiya-Noolandi-Hong (STNH), Onsager, and Braun models as well as Monte Carlo (MC) simulations of charge recombination/separation have been applied for the first time to reproduce the results of the electromodulated photoluminescence measurements in vacuum-evaporated films of fluorescent materials commonly used in optoelectronic devices. The values of the electron-hole pair final recombination speed in the monomer emitters: 4,4′,4″-tris(N-(3-methylphenyl)-N-phenylamino)triphenylamine (m-MTDATA), mer-tris(8-quinolato) aluminium (Alq3), dimer emitter, 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (bathocuproine, BCP) as well as exciplex emitter, m-MTDATA:BCP were estimated. It has been shown that the final recombination step proceeds at the finite distance of roughly one intermolecular separation which should be taken into account in any reliable description of electronic processes in given organic systems. While performance of the STNH and Onsager formalisms remains satisfactory, the Braun model should rather not be applied to a system with a strong electric-field-assisted dissociation of e-h pairs. The main results for a continuous medium were well-supported by MC simulations of diffusion on a discrete energetically ordered lattice of point molecules.
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Informacje szczegółowe
- Kategoria:
- Publikacja w czasopiśmie
- Typ:
- artykuł w czasopiśmie wyróżnionym w JCR
- Opublikowano w:
-
ORGANIC ELECTRONICS
nr 39,
strony 328 - 339,
ISSN: 1566-1199 - Język:
- angielski
- Rok wydania:
- 2016
- Opis bibliograficzny:
- Grygiel P., Falkowski K., Pelczarski D., Stampor W.: Sano-Tachiya-Noolandi-Hong, Onsager and Braun models vs Monte Carlo simulation of charge photogeneration in organic solids// ORGANIC ELECTRONICS. -Vol. 39, (2016), s.328-339
- DOI:
- Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1016/j.orgel.2016.10.023
- Weryfikacja:
- Politechnika Gdańska
wyświetlono 97 razy
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