Photo- and electroluminescent properties of bithiophene disubstituted 1,3,4-thiadiazoles and their application as active components in organic light emitting diodes

TitoloPhoto- and electroluminescent properties of bithiophene disubstituted 1,3,4-thiadiazoles and their application as active components in organic light emitting diodes
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione2014
AutoriGrykien, R., Luszczynska B., Glowacki I., Kurach E., Rybakiewicz R., Kotwica K., Zagorska M., Pron A., Tassini P., Maglione Maria Grazia, De Girolamo Del Mauro Anna, Fasolino T., Rega R., Pandolfi G., Minarini Carla, and Aprano S.
RivistaOptical Materials
Volume37
Paginazione193-199
ISSN09253467
Parole chiave1, 3, 4-thiadiazoles, Active components, Diodes, Electroluminescence, Electroluminescent properties, Host/guest electroluminescent system, light, Light emitting diodes, Luminous efficiency, Organic light emitting diodes (OLED), Organic light emitting diodes(OLEDs), Poly(N-vinylcarbazole), Solution processable
Astratto

Photo- and electroluminescence of five bithiophene disubstituted 1,3,4-thiadiazoles, constituting a new class of solution processable materials for organic opto-electronics, were studied. It was found that the introduction of alkyl solubilizing substituents bathochromically shifted the photo- and electroluminescence bands. The most pronounced effect was observed for the substitution at the Cα position which changed the emitting light color from bluish to green. All five derivatives were tested in host/guest type organic light emitting diodes (OLEDs) with either poly(N-vinylcarbazole) (PVK) or poly(N-vinylcarbazole) + 2-tert-butylphenyl-5-biphenyl-1,3,4-oxadiazole (PVK + PBD) matrices. The latter matrix turned out especially well suited for these guest molecules yielding devices of varying color coordinates. The best luminance (750 cd/m2) was measured for 2,5-bis(5'-octyl-2,2'-bithiophene-5-yl)-1,3,4-thiadiazole with the luminous efficiency exceeding 0.4 cd/A. © 2014 Elsevier B.V. All rights reserved.

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84929026180&doi=10.1016%2fj.optmat.2014.05.023&partnerID=40&md5=f0ce41acd2c2fe54ddf654be66b90c1d
DOI10.1016/j.optmat.2014.05.023