We briefly flagged, very recently, research carried out at the National Tsing Hua University in Taiwan, into organic LEDs with a full range of colour temperatures. They were capable of copying the full spectrum of sunlight throughout the day (2500 K - 8000 K) - Taiwan researchers create OLEDs with color temp spectrum of sunlightOur Technology Editor, Steve Bush, got on the case to dig further into this work, and explain more about it. Make sure you read the resulting article - Voltage tunes OLED across all sunlight hues
The article begins:
Taiwanese researchers have made an OLED structure that can emit all the hues of sunlight, simply by changing its terminal voltage.
The emitter is a series of layers including red/orange (590nm), green (495nm) and blue (460nm) OLED materials.
Holes move faster in the selected materials so, according Professor Jwo-Huei Jou of National Tsing-Hua University, without the hole modulation layer they would mostly make it to the all the way to the red OLED before they combined with sluggish electrons leaving the electron transport layer - making it a red emitter.Read the full article >>
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