Electroluminescence improving efficiency

P.L. Bum, A.B. Holmes, A. Kraft, D.D.C. Bradley, A.R. Brown, and R.H. Friend, Synthesis of a segmented conjugated polymer-chain giving a blue-shifted electroluminescence and improved efficiency, J. Chem. Soc., Chem. Commune. 32-34, 1992. 

The electroluminescence (EL) efficiency and the emission energy of iridium(III) complex based devices are greatly influenced by the organic ligand chromophores (Tang VanSlyke 1987 Tang VanSlyke 1989 Baldo et al. 1989). In the way to improve and tune the emission colors, we synthesized and reported the iridium(III) complexes using 2-... 

The composition of the copolymer determines its electroluminescence efficiency. Optimal efficiency (0.3%) was achieved in system 34 when the feed ratio of monomer 4 to monomer 34 was 9 1. This represents a 30-fold improvement in luminescence efficiency relative to PPV in the same device configuration (AlALOj/polymer/Al) 58, 62. Copolymer 33 has found uses as waveguides and... 

Research on semiconductor nanoparticle technology by chemists, materials scientists, and physicists has already led to the fabrication of a number of devices. Initially, Alivisatos and co-workers developed an electroluminescence device from a dispersion of CdSe nanoparticles capped with a conducting polymer349 and then improved on this by replacing the polymer with a layer of CdS, producing a device with efficiency and lifetime increased by factors of 8 and 10, respectively. 0 Chemical synthetic methods for the assembly of nanocrystal composites, consisting of II-VI quantum dot polymer composite materials,351 represent one important step towards the fabrication of new functional devices that incorporate quantum dots. 

Y Cao, ID Parker, G Yu, C Zhang, and AJ Heeger, Improved quantum efficiency for electroluminescence in semiconducting polymers, Nature, 397 414—417, 1999. 

T.K. Hatwar, G. Rajeswaran, C.W. Tang, and J. Shi, Organic Electroluminescent Devices with Improved Stability and Efficiency, Eur. Pat. Appl., EP1162674B1 (2004). 

SA VanSlyke and CW Tang, Organic Electroluminescent Devices Having Improved Power Conversion Efficiencies, U.S. Patent 4,539,507, September 3, 1985. 

Organic electroluminescent devices having improved power conversion efficiencies... 

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