2. GEB description

First of all, it's important to remember how an OLED works. A single-layer OLED, the simplest device, consists of a layer of a small organic molecule or polymer deposited between two electrodes . EL is produced by injecting holes (at the anode) and electrons (at the cathode) into the organic layer, transporting these charges through the material, allowing them to recombine into an electron-hole pair known as an "exciton", and then relaxing these excitons to emit light. The color emitted by OLEDs is directly linked to the nature of the organic layer, and is determined according to the colorimetric reference system of the International Commission on Illumination, using...