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- W2497021540 abstract "Facing the 21st century, the development of new techniques that are able to display datafaster, more detailed and in mobile applications, is one of the prospering scientific fields.One approach for lightweight, flexible, power-efficient full-color displays are organic lightemitting diodes (OLEDs). Such devices with their low driving voltage, bright colorand high repetition rate (e.g. for video-application) are ideal for usage in miniaturedisplays as well as in large area screen [1-3]. The basic principle of these devices areelectroluminescent ‘semiconducting’ organic materials packed between two electrodes.After charge injection from the electrodes into the organic layer and charge migrationwithin this layer, electrons and deficient electrons (so called ‘holes’) can recombine to forman excited singlet state. Light emission of the latter is then a result of relaxation processes[4-6]. To achieve high electroluminescence efficiencies, the materials have to fulfill severalspecific requirements including low injection barriers at the interface between electrodesand organic material, balanced electron-and hole-density and mobility and high luminescence efficiency. Furthermore, the recombination zone should be located away from themetal cathode to prevent annihilation of the exited state. Since no material known to dateis able to meet all these criteria, modern OLEDs consist — besides the transparentsubstrate (e.g., glass, PET), anode (most commonly indium tin oxide, ITO) and metalcathode (e.g., Mg-Ag-alloy) — of several organic layers for charge injection, transportand/or emission [7,8] (the principal set-up is shown in Scheme 1)." @default.
- W2497021540 created "2016-08-23" @default.
- W2497021540 creator A5014725874 @default.
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- W2497021540 creator A5051742679 @default.
- W2497021540 creator A5057888461 @default.
- W2497021540 creator A5065367895 @default.
- W2497021540 creator A5088377139 @default.
- W2497021540 date "2004-11-27" @default.
- W2497021540 modified "2023-10-18" @default.
- W2497021540 title "Polymers for Organic Light Emitting Devices/Diodes (OLEDs)" @default.
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