Polymeric electroluminescent devices

Y. Yang, S.C. Chang, J. Bharathan, and J. Liu, Organic/polymeric electroluminescent devices processed... 

Ion Migration Effects in the Degradation of Polymeric Electroluminescent Devices... 

The enormous progress in the field of electroluminescent conjugated polymers has led to performances of oiganic light-emitting devices (LEDs) that are comparable and in some aspects superior to their inorganic counterparts 11). Quantum efficiencies in excess of 5% have been demonstrated [2] and show that a high fraction of the injected carriers in a polymeric electroluminescence (EL) device form electronic excitations which recombine radiatively. 

Monomers of die type Aa B. are used in step-growth polymerization to produce a variety of polymer architectures, including stars, dendrimers, and hyperbranched polymers.26 28 The unique architecture imparts properties distinctly different from linear polymers of similar compositions. These materials are finding applications in areas such as resin modification, micelles and encapsulation, liquid crystals, pharmaceuticals, catalysis, electroluminescent devices, and analytical chemistry. 

U.S. 5,653,914 Electroluminescent device comprising a chromophoric polymeric composition... 

Research Focus Development of polymeric naphthylanthiacene derivatives suitable for use in organic electroluminescent devices. 

Since the appearance of the redox [ii, iii] and conducting [iv] polymer-modified electrodes much effort has been made concerning the development and characterization of electrodes modified with electroactive polymeric materials, as well as their application in various fields such as -> sensors, actuators, ion exchangers, -> batteries, -> supercapacitors, -> photovoltaic devices, -> corrosion protection, -> electrocatalysis, -> elec-trochromic devices, electroluminescent devices (- electroluminescence) [i, v-viii]. See also -> electrochemically stimulated conformational relaxation (ESCR) model, and -> surface-modified electrodes. 

H. Kajii, T. Tsukagawa, T. Taneda, K. Yoshino, M. Ozaki, A. Fujii, M. Hikita, S. Tomaru, S. Imamura, H. Takenaka, J. Kobayashi, and R Yamamoto, Transient properties of organic electroluminescent diodes using 8-hydroxyquinoline aluminum doped with rubrene as an electro-optical conversion device for polymeric integrated devices, Jpn. J. Appl. Phys., 41(4B), 2746-2748 (2002). 

Intercalation refers to the inclusion of molecules between the layers. Exfoliation refers to the separation of the layers. In other words, intercalated polymer chains are sandwiched in between clay layers. In exfoliated nanocomposites the individual layers are separated, and somewhat uniformly dispersed in the polymeric matrix. This class of materials has been widely investigated because of their unique properties. The efficiency of PPV-related electroluminescent devices is summarized in Table 3.5. 

In addition, the additives can improve the charge injection and power efficiency of light-emitting devices manufactured from the screen-printable electroluminescent polymer ink. A formulation of a polymeric electroluminescent ink is shown in Table 3.6. 

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