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Electroluminescent Properties of an Electrochemically Cross‐Linkable Carbazole Peripheral Poly(Benzyl Ether) Dendrimer
Author(s) -
Park Jin Young,
Kim DongEun,
Ponnapati Ramakrishna,
Kim JongMin,
Kwon YoungSoo,
Advincula Rigoberto C.
Publication year - 2011
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201000785
Subject(s) - carbazole , electroluminescence , dendrimer , excited state , materials science , chromaticity , photochemistry , ether , excimer , oxadiazole , doping , polymer chemistry , chemistry , optoelectronics , layer (electronics) , organic chemistry , fluorescence , nanotechnology , optics , physics , nuclear physics
The electroluminescent (EL) properties of a cross‐linkable carbazole‐terminated poly(benzyl ether) dendrimer, G 3 ‐cbz DN, doped into a PVK:PBD host matrix with a double‐layer device configuration are investigated. Different concentrations of the guest material can control device efficiency, related to chromaticity of white emission and the origin of excited‐state complexes occurring between hole‐transporting carbazole units (PVK or G 3 ‐cbz DN) and electron‐transporting oxadiazole (PBD). Two excited states (exciplex and electroplex) generated at the interfaces of PVK/G 3 ‐cbz DN and PBD result in competitive emission, exhibiting a broad band in the EL spectra.