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Device structure of the LED with SP coupling (LED III). Current spreading layer.
PL spectra of the three samples with bottom excitation and bottom detection. The inset shows the PL intensity ratio using the standard LED (LED I-B) as the reference.
EL spectra of the six emission outputs from the three samples when the injection current is . The inset shows the EL intensity ratio using the bottom-emitting standard LED output (LED I-B) as the reference.
LED intensities of the six emission outputs from the three samples as functions of injection current.
Summations of the top and bottom-emitting intensities of the three samples as functions of injection current.
Current vs voltage ( curves) of the three samples.
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