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Phosphorescent Iridium Complex (phosphorescent + iridium_complex)

Distribution by Scientific Domains
Polymers and Materials Science80%

Selected Abstracts

Phosphorescent Hybrid Organic,Inorganic Light-Emitting Diodes

ADVANCED MATERIALS, Issue 19 2010
Henk J. Bolink
Competitive efficacy and power conversion efficiency (15,cd,A,1 and above 9,lm,W,1, respectively) are obtained for a hybrid organic,inorganic light-emitting diode (HyLED) with air-stable metal oxides as electrodes. Thanks to the use of a phosphorescent iridium complex and a Cs-doped ZnO cathode, performances approaching those of standard solution-processed organic LEDs can be obtained. [source]

Harvesting Triplet Excitons from Fluorescent Blue Emitters in White Organic Light-Emitting Diodes,

ADVANCED MATERIALS, Issue 21 2007
G. Schwartz
A novel concept for white organic light emitting diodes (OLEDs) enabling the utilization of all electrically generated excitons for light generation is introduced. The key feature is a fluorescent blue emitter with high triplet energy, rendering it possible to harvest its triplet excitons by letting them diffuse to an orange phosphorescent iridium complex. [source]

Single-Molecule Electroluminescence of a Phosphorescent Organometallic Complex

CHEMPHYSCHEM, Issue 8 2009
Yasuhiro Sekiguchi
Abstract Lighting one by one: The electroluminescence (EL) from single molecules of a red phosphorescent iridium complex dispersed in a hole-transporting polymer matrix is studied. The single-molecule EL dynamics is determined by local structural inhomogeneities in the matrix polymer (see picture). [source]

Efficient Polymer White-Light-Emitting Devices for Solid-State Lighting

ADVANCED MATERIALS, Issue 41 2009
Hongbin Wu
Highly efficient polymer white-light-emitting devices with a single emission layer containing a sky,blue triplet emitter and some home-made yellow phosphorescent iridium complexes doped into a polymer host are fabricated. The optimized devices present CIE coordinates of (0.395,0.452) at a current density of 12,mA,cm,2. [source]

Synthesis and luminescence of poly(phenylacetylene)s with pendant iridium complexes and carbazole groups

JOURNAL OF POLYMER SCIENCE (IN TWO SECTIONS), Issue 17 2010
José Vicente
Abstract Poly(phenylacetylene)s containing pendant phosphorescent iridium complexes have been synthesized and their electrochemical, photo- and electroluminescent properties studied. The polymers have been synthesized by rhodium-catalyzed copolymerization of 9-(4-ethynylphenyl)carbazole (CzPA) and phenylacetylenes (C,N)2Ir(,2 - O,O,-MeC(O)CHC(O)C6H4CCH-4) (C,N = ,2 - N,C1 -2-(pyridin-2-yl)phenyl (IrppyPA) or ,2 - N,C1 -2-(isoquinolin-1-yl)phenyl (IrpiqPA)). In addition, organic poly(phenylacetylene)s with pendant carbazole groups have been synthesized by rhodium-catalyzed copolymerization of CzPA and 1-ethynyl-4-pentylbenzene. Complex (C,N)2Ir(,2 - O,O,-MeC(O)CHC(O)Ph) (IrpiqPh; C,N = 2-(isoquinolin-1-yl)phenyl-,2 - N,C1) was prepared and characterized. While the copolymers of the Irppy series were weakly phosphorescent, those of the Irpiq series displayed at room temperature intense emissions from the carbazole (fluorescence) and iridium (phosphorescence) emitters, being the latter dominant when the spectra were recorded using polymer films. Triple layer OLED devices employing copolymers of the Irpiq series or the model complex IrpiqPh yielded electroluminescence with an emission spectra originating from the iridium complex and maximum external quantum efficiencies of 0.46% and 2.99%, respectively. © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 3744,3757, 2010 [source]