Journal ArticleDOI
White-electrophosphorescence devices based on rhenium complexes
Feng Li,Ming Zhang,Jing Feng,Gang Cheng,Zhijun Wu,Yuguang Ma,Shiyong Liu,Jiacong Sheng,Shuit-Tong Lee +8 more
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TLDR
In this paper, the authors reported efficient white emission from mixing of yellow emission from Re-complexes, (4,4′-dimethyl-2,2′-bipyridine)Re(CO)3Cl (Dmbpy-Re), and blue emission from the N,N′-di-1-naphthyl-N, N′-diphenylbenzidine (NPB) is reported.Abstract:
Efficient white emission from the mixing of yellow emission from the Re-complexes, (4,4′-dimethyl-2,2′-bipyridine)Re(CO)3Cl (Dmbpy-Re), and blue emission from the N,N′-di-1-naphthyl-N, N′-diphenylbenzidine (NPB) is reported. NPB is used as the hole-transporting layer. 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline is used as the exciton-blocking as well as electron-transporting layer. Dmbpy-Re is doped into the host material (4,4′-N-N′-dicarbazole)biphenyl (CBP). The chromaticity of the white emission can be tuned by adjusting the thickness of Dmbpy-Re:CBP layer or the concentration of Dmbpy-Re in CBP. The maximum luminance, efficiency, and Commission Internationale De L’Eclairage coordinates at 9 V of the devices with 20-nm-thick and 30-nm-thick Dmbpy-Re:CBP layer at a fixed Dmbpy-Re doping concentration of 2 wt % in CBP are 1332 cd/m2, 2.9 cd/A, and (0.30,0.37), and 2410 cd/m2, 5.1 cd/A, and (0.36,0.43), respectively. The turn-on voltage of these devices is ∼4 V.read more
Citations
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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
Near-infrared phosphorescence: materials and applications
TL;DR: This review describes the overall progress made in the past ten years on NIR phosphorescent transition-metal complexes including Cu(I), Cu(II), Cr(III), Re(I, Re-I), Re-III, Ru(II) and Au(I) complexes, with a primary focus on material design complemented with a selection of optical, electronic, sensory, and biologic applications.
Journal ArticleDOI
Triplet Harvesting in Hybrid White Organic Light‐Emitting Diodes
TL;DR: In this article, a triplet harvesting concept for hybrid white organic light-emitting diodes (OLEDs) is discussed, which combines a blue fluorophor with red and green phosphors and is capable of reaching an internal quantum efficiency of 100% if a suitable blue emitter with high-lying triplet transition is used.
Journal ArticleDOI
A novel class of phosphorescent gold(III) alkynyl-based organic light-emitting devices with tunable colour.
Keith Man-Chung Wong,Xiuling Zhu,Ling-Ling Hung,Nianyong Zhu,Vivian Wing-Wah Yam,Hoi Sing Kwok +5 more
TL;DR: A novel class of luminescent cyclometalated gold(III) alkynyl complexes has been demonstrated to possess EL properties and has been employed in the roles of electrophosphorescent emitters or dopants of organic light-emitting diodes (OLEDs) with high brightness and efficiency.
Journal ArticleDOI
Osmium‐ and Ruthenium‐Based Phosphorescent Materials: Design, Photophysics, and Utilization in OLED Fabrication
Pi-Tai Chou,Yun Chi +1 more
TL;DR: Osmium(II) complexes possessing β-diketonate, quinolinate, diimine and C-linked pyridyl azolate chelates reveal interesting structural and photophysical properties as discussed by the authors.
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.
Journal ArticleDOI
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
Nearly 100% internal phosphorescence efficiency in an organic light emitting device
TL;DR: In this paper, the authors demonstrate very high efficiency electrophosphorescence in organic light-emitting devices employing a phosphorescent molecule doped into a wide energy gap host, achieving a maximum external quantum efficiency of 19.0±1.0 and luminous power efficiency of 60±5 lm/W.
Journal ArticleDOI
Enhanced electron injection in organic electroluminescence devices using an Al/LiF electrode
TL;DR: In this article, an ultrathin LiF layer adjacent to an electron-transporting layer and an aluminum outerlayer was used as an electrode for organic electroluminescent devices.
Journal ArticleDOI
High-efficiency red electrophosphorescence devices
Chihaya Adachi,Marc A. Baldo,Stephen R. Forrest,Sergey Lamansky,Mark E. Thompson,Raymond Kwong +5 more
TL;DR: In this article, the authors demonstrate high-efficiency red electrophosphorescent organic light-emitting devices employing bis(2′-benzo[4,5-a]thienyl)pyridinato-N,C3′) iridium(acetylacetonate) [Btp2Ir(acac)] as a red phosphor.