Researchers have found a new way to simplify the structure of high-efficiency blue organic light-emitting diodes (OLEDs), which could lead to longer-lasting and higher definition television screens.
OLEDs are a class of organic electronics that are already found commercially in smartphones and displays and can be more efficient than competing technologies.
Although OLED television screens have vivid picture quality, they also have drawbacks such as high cost and comparatively short lifespans.
In OLED displays, screen pixels are composed of three different colored subpixels—red, green and blue—that light up at different intensities to create different colors. However, the subpixels that emit blue light are the least stable and can be susceptible to screen "burn-in," which can discolor the screen and ruin viewing quality.
In a paper published in Nature Materials, a team of researchers from Northumbria, Cambridge, Imperial and Loughborough universities describe a new design that overcomes these issues and may lead to simpler, less expensive systems with purer and more stable blue light.
Their findings could lead to TV and smartphone screens using less energy in future, making them more efficient and sustainable.
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