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A schematic of the fabrication flow of the dual wavelength white LED using laterally distributed green and blue MQWs.
SEM images of (a) the surface of the laterally distributed blue and green MQWs before removing the mask layer, (b) after removing mask layer, (c) surface grown on the laterally distributed blue and green MQWs, and (d) AFM image of same surface. The inset shows a cross-sectional SEM image of the LED structure.
Normalized PL spectra of blue, green, and merged blue and green MQWs.
EL spectra of the dual wavelength white LED. The inset shows EL spectra measured at high injection current. (b) The integrated EL intensity and ratio of green to blue emissions as a function of injection current.
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