Journal ArticleDOI
Synthesis and characterization of phosphorescent cyclometalated platinum complexes.
Jason Brooks,Yelizaveta Babayan,Sergey Lamansky,Peter I. Djurovich,Irina Tsyba,Robert Bau,Mark E. Thompson +6 more
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TLDR
The synthesis, electrochemistry, and photophysics of a series of square planar Pt(II) complexes are reported, with well-resolved vibronic fine structure observed in all of the emission spectra.Abstract:
The synthesis, electrochemistry, and photophysics of a series of square planar Pt(II) complexes are reported. The complexes have the general structure C∧NPt(O∧O),where C∧N is a monoanionic cyclometalating ligand (e.g., 2-phenylpyridyl, 2-(2‘-thienyl)pyridyl, 2-(4,6-difluorophenyl)pyridyl, etc.) and O∧O is a β-diketonato ligand. Reaction of K2PtCl4 with a HC∧N ligand precursor forms the chloride-bridged dimer, C∧NPt(μ-Cl)2PtC∧N, which is cleaved with β-diketones such as acetyl acetone (acacH) and dipivaloylmethane (dpmH) to give the corresponding monomeric C∧NPt(O∧O) complex. The thpyPt(dpm) (thpy = 2-(2‘-thienyl)pyridyl) complex has been characterized using X-ray crystallography. The bond lengths and angles for this complex are similar to those of related cyclometalated Pt complexes. There are two independent molecular dimers in the asymmetric unit, with intermolecular spacings of 3.45 and 3.56 A, consistent with moderate π−π interactions and no evident Pt−Pt interactions. Most of the C∧NPt(O∧O) complexes...read more
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White Organic Light‐Emitting Devices for Solid‐State Lighting
TL;DR: In this article, the advantages and disadvantages of several WOLED architectures in terms of efficiency and color quality are discussed, as well as their widespread acceptance as solid-state lighting sources.
Patent
Organic light-emitting device
Yoon-Hyun Kwak,Seok-Hwan Hwang,Young-Kook Kim,Hye-jin Jung,Jong-hyuk Lee,Jin-O Lim,Hyung-Jun Song +6 more
TL;DR: In this paper, the authors presented a heterocyclic compound and an organic light-emitting device including the HOC compound, which have high efficiency, low driving voltage, high luminance and long lifespan.
Journal ArticleDOI
Recent Progresses on Materials for Electrophosphorescent Organic Light-Emitting Devices
TL;DR: Blue phosphorescence approaching the theoretical efficiency has also been achieved, which may overcome the final obstacle against the commercialization of full color display and white light sources from phosphorescent materials.
Journal ArticleDOI
The potential of palladacycles: more than just precatalysts
Journal ArticleDOI
Transition-metal phosphors with cyclometalating ligands: fundamentals and applications
Yun Chi,Pi-Tai Chou +1 more
TL;DR: Various types of cyclometalating chelates for which the favorable metal-chelate bonding interaction, on the one hand, makes the resulting phosphorescent complexes highly emissive in both fluid and solid states at room temperature, are reviewed.
References
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Journal ArticleDOI
Highly efficient phosphorescent emission from organic electroluminescent devices
Marc A. Baldo,D. F. O’Brien,Yujian You,Andrei Shoustikov,Scott Sibley,Scott Sibley,Mark E. Thompson,Stephen R. Forrest +7 more
TL;DR: In this article, a host material doped with the phosphorescent dye PtOEP (PtOEP II) was used to achieve high energy transfer from both singlet and triplet states.
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The nature of .pi.-.pi. interactions
Journal ArticleDOI
Ru(II) polypyridine complexes: photophysics, photochemistry, eletrochemistry, and chemiluminescence
Alberto Juris,Vincenzo Balzani,F. Barigelletti,Sebastiano Campagna,Peter Belser,A. Von Zelewsky +5 more
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Very high-efficiency green organic light-emitting devices based on electrophosphorescence
TL;DR: In this paper, the performance of an organic light-emitting device employing the green electrophosphorescent material, fac tris(2-phenylpyridine) iridium [Ir(ppy)3] doped into a 4,4′-N,N′-dicarbazole-biphenyl host was described.
Journal ArticleDOI
Highly phosphorescent bis-cyclometalated iridium complexes: synthesis, photophysical characterization, and use in organic light emitting diodes.
Sergey Lamansky,Peter I. Djurovich,Drew Murphy,Feras Abdel-Razzaq,Hae-Eun Lee,Chihaya Adachi,Paul E. Burrows,Paul E. Burrows,Stephen R. Forrest,Mark E. Thompson +9 more
TL;DR: The synthesis and photophysical study of a family of cyclometalated iridium(III) complexes are reported, and three of the C(**)N2Ir(acac) complexes were used as dopants for organic light emitting diodes (OLEDs) and show some of the highest efficiencies reported for organic Light Emitting Diodes.