Effective Electrophosphorescence Emitting Devices by Using New Type Ir(III) Complex with Bluky Substistuent Spacers
- 1 February 2006
- journal article
- research article
- Published by Taylor & Francis in Molecular Crystals and Liquid Crystals
- Vol. 444 (1) , 95-101
- https://doi.org/10.1080/15421400500365243
Abstract
The new green Ir(III) complex, fac-tris[4-methyl-2-(4′-trimethylsilylph-enyl)pyridine] [Ir(msippy)3], is synthesized and phosphorescent light emitting devices fabricated by using them as triplet emissive dopants. Ir(dsippy)3 in UV-Vis. spectra showed absorption band at 395 nm originating from 1MLCT. The EL devices with configuration of ITO/CuPc (10 nm)/α -NPD (40 nm)/CBP-Ir(msippy)3 (20 nm)/BCP (10 nm)/Alq3 (40 nm)/LiF (1 nm)/Al (100 nm).showed the emission maximum at 516 nm, due to the radiative decay from 3MLCT state to ground state. The 6% doped devices showed the maximum efficiency of 49.9 cd/A and power efficiency 25.3 lm/W. The observed PL quantum efficiency (0.43) of the [Ir(msippy)3] in CH2Cl2 shows slightly higher than that of reported Ir(ppy)3 (Φ = 0.40).Keywords
This publication has 7 references indexed in Scilit:
- Effect of Substitution of Methyl Groups on the Luminescence Performance of IrIII Complexes: Preparation, Structures, Electrochemistry, Photophysical Properties and Their Applications in Organic Light‐Emitting Diodes (OLEDs)European Journal of Inorganic Chemistry, 2004
- Color Tunable Organic Light‐Emitting Diodes Using Pentafluorophenyl‐Substituted Iridium ComplexesAdvanced Materials, 2003
- New Iridium Complexes as Highly Efficient Orange–Red Emitters in Organic Light‐Emitting DiodesAdvanced Materials, 2003
- Endothermic energy transfer: A mechanism for generating very efficient high-energy phosphorescent emission in organic materialsApplied Physics Letters, 2001
- Semiconducting and Metallic Polymers: The Fourth Generation of Polymeric Materials (Nobel Lecture)Angewandte Chemie International Edition in English, 2001
- Highly Phosphorescent Bis-Cyclometalated Iridium Complexes: Synthesis, Photophysical Characterization, and Use in Organic Light Emitting DiodesJournal of the American Chemical Society, 2001
- Excited-state properties of a triply ortho-metalated iridium(III) complexJournal of the American Chemical Society, 1985