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| Add-Vision's Display Technology |
Add-Vision has developed a doped P-OLED device structure. This device structure offers many of the attractive display characteristics of mainstream OLED devices, but is much more easily manufactured. This arises from a simplified device structure, all layers being printable, air-stability of the cathode, and the use of flexible substrates. The success of doped P-OLEDs lies first with the Light-Emitting Polymer (LEP) ink, which is specially formulated by Add-Vision with LEP and doped with special additives and transport materials. The LEP ink additives developed by Add-Vision enable low-voltage charge injection and high-efficiency radiative recombination in the luminescent polymer without the need for unstable, vacuum-deposited metal electrodes. The doped P-OLED structure is also much less sensitive than conventional thin film OLEDs with regard to LEP layer thickness and thickness variations which can arise from high throughput, low cost printing processes. The Add-Vision structure uses air-stable printable cathode materials, that enable low-voltage operation, high power efficiency, and uniform emission, while simultaneously being printable in air and compatible with low temperature handling of flexible substrates.
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