Organic Light Emitting Diodes (OLED) are affixed to the surface of the wall and can create various lighting effects. The wall becomes a flat screen of light or can be programmed to display light patterns. OLEDs are a multi-layered structure. The base layer is typically the anode with an electricity-conducting layer of organic composite on top of the anode. The next layer is an emissive layer that allows the electrons to move up to the final layer – the cathode. This is the basis structure of OLEDs. OLEDs would provide designers greater freedom in the interior of buildings and possibly on the exterior of buildings. OLEDs are currently very expensive to produce and use a variety of metals in the layers.
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