Researchers working on organic light-emitting devices (OLEDs) have made a critical jump that could finally call lights out time for the humble bulb. Since OLEDs are transparent when switched off, the prospect is of whole surfaces like walls, windows, or even curtains flooding rooms with brilliant white light.University of Southern California Professor Mark Thompson said: “This process will enable us to get 100 percent efficiency out of a single, broad spectrum light source.”
The American team's breakthrough was to make OLEDs able to emit the daylight-style white light needed in homes and offices...
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