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Development and characterization of light‐emitting diodes (LEDs) based on ruthenium complex single layer for transparent displays
Author(s) -
Santos G.,
Fonseca F.,
Andrade A. M.,
Patrocínio A. O. T.,
Mizoguchi S. K.,
Murakami Iha N. Y.,
Peres M.,
Monteiro T.,
Pereira L.
Publication year - 2008
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200778925
Subject(s) - electroluminescence , light emitting diode , indium tin oxide , ruthenium , materials science , photoluminescence , diode , substrate (aquarium) , optoelectronics , layer (electronics) , indium , analytical chemistry (journal) , chemistry , nanotechnology , biochemistry , chromatography , oceanography , geology , catalysis
In this work, two ruthenium complexes, [Ru(bpy) 3 ](PF 6 ) 2 and [Ru(ph2phen) 3 ](PF 6 ) 2 in poly(methylmethacrylate) matrix were employed to build single‐layer light‐emitting electrochemical cells by spin coating on indium tin oxide substrate. In both cases the electroluminescence spectra exhibit a relatively broad band with maxima near to 625 nm and CIE ( x , y ) color coordinates of (0.64, 0.36), which are comparable with the photoluminescence data in the same medium. The best result was obtained with the [Ru(bpy) 3 ](PF 6 ) 2 device where the optical output power approaches 10 µW at the band maximum with a wall‐plug efficiency higher than 0.03%. The lowest driving voltage is about 4 V for an electrical current of 20 mA. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)