Unique Method Manufactures Green LEDs Without Color Conversion

Plessey has developed a proprietary 2D planar gallium nitride on silicon (GaN-on-Si) process to emit green light without the need for color conversion techniques. To produce green light, LED manufacturers typically apply phosphors or quantum dot conversion materials to native blue LEDs. These materials then convert short wavelength, typically 450-nm, blue light to red or green wavelengths with typically 10% to 30% efficiency. 

 

Plessey's native green LEDs are formed inherently using its proprietary GaN-on-Si epitaxial growth process like the native blue LEDs with the principal difference coming in the amount of indium that is incorporated in the quantum well structures of the LED.  With no color conversion losses, the native green emission is orders of magnitude times brighter than a color converted process for microLEDs. With a dominant green wavelength of 530 nm and a full width half maximum wavelength of 31 nm, the green is suited for color displays.

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Additionally, the green emission is said to exhibit outstanding wavelength stability versus current density. For further information, visit Plessey.

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