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• Fabrication and Study of Polymer Light Emitting Devices.
• Polymer based light-emitting diodes (LED) were discovered in 1990 by Friend et al. The first polymer LEDs used poly(phenylene vinylene) (PPV) as the emitting layer. ...
• Our research efforts in the area of polymer light-emitting devices focuses on novel configurations using a variety of polymer and copolymer systems. Light-emitting devices consist of active/emitting layer(s) sandwiched between a cathode and an anode. ... Figure 1b shows a novel configuration: a symmetrically configured alternating current light emitting (SCALE) device, which works under AC as well as forward and reverse DC bias. ...
• Figure 3 is a picture of a 7-bar polymeric light emitting device display. The device configuration makes use of a polymer hole-transporting layer and a polymer emitting layer. ...
• Epstein, High Luminescent Efficiency In Light-Emitting Polymers Due To Effective Exciton Confinement, Applied Physics Letters 76, 634-636 (2000). ...
• Epstein, Multicolor Multilayer Light Emitting Devices Based on Pyridine-Containing Conjugated Polymers and Para-Sexiphenyl Oligomer, Applied Physics Letters 74, 3613-3615 (1999). ...
• Epstein, Polarity and Voltage Controlled Color Variable Light Emitting Devices Based on Conjugated Polymers, Applied Physics Letters 74, 2593-2595 (1999). ...
• Epstein, Color Variable Multilayer Light Emitting Devices Based on Conjugated Polymers and Oligomers, Synthetic Metals 102, 889-892 (1999). ...
• Wang, Interface Control of Polymer and Oligomer-Based Light Emitting Devices, Semiconductive Polymers, ACS Symposium Series 735, edited by Y. ...
• Epstein, Interface Control of Light-emitting Devices Based on Pyridine-containing Conjugated Polymers, Accounts of Chemical Research 32, 217-224 (1999). ...
• Epstein, New Approach to Color Variable Light-Emitting Devices Based on Conjugated Polymers, Proceedings, International Society of Optical Engineers on Optical Probes of Conjugated Polymers, vol. ...
• Epstein, Novel Light-Emitting Devices Based on Pyridine-Containing Conjugated Polymers, IEEE Transactions on Electron Devices 44 (8), 1263-1268 (1997). ...

• Tunable multi block copolymers for Light-Emitting Diodes (LED) and quantum-well devices .
• Tunable multi block copolymers for Light-Emitting Diodes (LED) and quantum-well devices (GCH3034). ...
• In this project the synthesis of new conjugated semi-conducting organic and/or hybrid organic-inorganic block copolymers with blocks of alkylated or alkoxylated, oligothiophenes, oligosilanes, oligovinylenes, oligophenylenes and oligo(p-phenylenevinylene)s will be pursued towards efficient, tunable, stable Light Emitting Diodes (LED) and other semi-conducting devices. ...
• materialen, opto-electronica, organische chemie, polymeren, Light Emitting Diode, LED, flat-panel display, informatiesystemen, telecommunicatie. ...

• Organic Light Emitting Diodes.
• In this thesis the electrical and luminescence properties of light emitting diodes using the poly(thiophenes) as active material are discussed. ... Different substituted poly(thiophenes), all with different band gaps, have been used as emitting layer in light emitting devices. Colours from near infra-red to blue have been obtained from these polymer light emitting diodes. ...
• By including thin solid films consisting of blends and/or bi-layers of conjugated polymers and molecules, the device characteristics or organic light emitting diodes are controlled. ...
• The electromagnetic environment of the emitting species may be influenced by placing the emitter in microcavities. ... Planar mirrors can easily be combined with the planar structure of an organic light emitting diode. ...

• Light-Emitting Diodes.
• Light-emitting diodes (LED) emit light in proportion to the forward current through the diode. ...

• Table of contents for Light-emitting diodes / E. ...
• History of light-emitting diodes 2. ... Resonant cavity light-emitting diodes 11. ...
• Library of Congress subject headings for this publication: Light emitting diodes .

• In light emitting diodes (LEDs), light is produced by a solid state process called electroluminescence. ...
• An LED is a directional light source, with the maximum emitted power in the direction perpendicular to the emitting surface. ...
• Light Emitting Diodes .

• ENT AN 105 light-emitting diode (CATV-A/E, p. ...
• CONT AN 120 Numerous devices are available for converting electronic signals to light; however at present only two cases of device are suitable for fiber optic systems : light-emitting diode (LED) (. ...
• Various LED constructions have been made in order to improve the coupling efficiency to a fiber, such as the Burrus diode or the edge-emitting LED. ...
• VO AN 145 light emitting diode (HENT-E/E, p. ...
• VA AN 160 edge-emitting LED (NUM FICHE 24, p. ... ), surface-emitting LED (NUM FICHE 62,p. ...

• -- Princeton scientists have created a variety of light-emitting materials that could greatly accelerate the development of flat-panel computer screens and other compact video displays. The discovery, a feat of engineering materials at the level of quantum mechanics, also may yield insights into the basic properties of light-emitting substances.
• The subject of the research is a type of device called an organic light-emitting diode (OLED). ...
• The efficiency of light-emitting devices depends on a detail of quantum mechanics: How well do molecules take advantage of two "excited" states that they enter when they receive an electric charge? The two states are called singlets and triplets; they always occur with three triplets for every singlet. ...

• LATEST NEWS RSS Feeds | Reprints | E-mail Alerts | Printable Version | Email Story January 6, 2004 Light-emitting transistor discovered; could revolutionize electronics.
• Put the inventor of the light-emitting diode and the maker of the world's fastest transistor together in a research laboratory and what kinds of bright ideas might surface? One answer is a light-emitting transistor that could revolutionize the electronics industry. ...
• and Milton Feng at the University of Illinois at Urbana-Champaign have uncovered a light-emitting transistor that could make the transistor the fundamental element in optoelectronics as well as in electronics. ...
• Holonyak, who invented the first practical light-emitting diode and the first semiconductor laser to operate in the visible spectrum. ...
• "This work is still in the early stage, so it is not yet possible to say what all the applications will be, but a light-emitting transistor opens up a rich domain of integrated circuitry and high-speed signal processing that involves both electrical signals and optical signals," he says. ...
• Unlike traditional transistors, which are built from silicon and germanium, the light-emitting transistors are made from indium gallium phosphide and gallium arsenide. ...

• The most important part of a light emitting diode (LED) is the semi-conductor chip located in the center of the bulb as shown at the right. ...

• Light Emitting Diode Structure.

• Light Emitting Diodes (LEDs) have been around for years in red, yellow and green. ...

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