Novel electroluminescent devices containing Eu(3+)-(2-acyl-1,3-indandionate) complexes with TPPO ligand


Autoria(s): TEOTONIO, E. E. S.; BRITO, H. F.; CREMONA, M.; QUIRINO, W. G.; LEGNANI, C.; FELINTO, M. C. F. C.
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

20/10/2012

20/10/2012

2009

Resumo

Fabrication and electroluminescent properties of devices containing europium complexes of general formula [Eu(ACIND)(3)(TPPO)(2)], where ACIND, 2-acyl-1,3-indandionate ligands: and TPPO, triphenylphosphine oxide. as emitter layers are discussed. The double-layer devices based on these complexes present the following configurations: device 1: ITO/TPD/[Eu(AlND)(3)(TPPO)(2)]/Al: device 2: ITO/TPD/[Eu(ISOV-IND)(3)(TPPO)(2)]/Al and device 3: ITO/TPD/[Eu(BIND)(3)(TPPO)(2)]/Al, where AlND, 2-acetyl-1,3-indandionate; ISOVIND, 2-isovaleryl-1,3-indandionate; and BIND, 2-benzoyl-1,3-indandionate, respectively. These devices exhibited photo and electroluminescent emissions. An important characteristic presented by devices is that their electroluminescent (EL) spectra, in the region of (5)D(0) -> (7)F(J) (J = 0, 1, 2, 3 and 4) transitions of Eu(3+) ion, show profiles that are different from photoluminescent (PL) ones. In addition to narrow bands arising from intraconfigurational-4f(6) transitions, devices 1 and 2 also exhibited a broad band with maximum at around 500 nm which is assigned to electrophosphorescence from the indandionate ligands. On the other hand, EL spectra of device 3 present only narrow bands from (5)D(0) -> (7)F(J) transitions. [Eu(ACIND)(3)(TPPO)(2)] complexes are promising candidates to prepare efficient organic light-emitting devices (OLEDs) when compared with those containing Eu(3+)-complexes of aliphatic beta-diketonate anions. (C) 2009 Elsevier B.V. All rights reserved.

FAPESP

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

FACEPE

FACEPE

RENAMI

RENAMI

CNPq-PRONEX

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Identificador

OPTICAL MATERIALS, v.32, n.2, p.345-349, 2009

0925-3467

http://producao.usp.br/handle/BDPI/31130

10.1016/j.optmat.2009.08.015

http://dx.doi.org/10.1016/j.optmat.2009.08.015

Idioma(s)

eng

Publicador

ELSEVIER SCIENCE BV

Relação

Optical Materials

Direitos

restrictedAccess

Copyright ELSEVIER SCIENCE BV

Palavras-Chave #Electroluminescence #2-acyl-1,3-indandionates #OLED #Europium #LUMINESCENCE #LANTHANIDES #EUROPIUM #Materials Science, Multidisciplinary #Optics
Tipo

article

original article

publishedVersion