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Cross-sectional SEM images of LED with pillars and air gap arrays of (a) 200 and 500, (b) 500 and 500, and (c) 700 and 400 nm height pillars and air gaps, and (d) mechanisms of the air gaps formation using ELO techniques.
Forward I–V characteristics of all fabricated LEDs, and the inset is reverse I–V characteristics of all fabricated LEDs.
EL spectra of all fabricated LEDs measured at 20 mA.
Measured output power as a function of the injection current for fabricated LEDs.
Relationship between the power enhancement factors of the experiment and the simulation with different heights of pillars and air gaps.
Detailed parameters used in the simulation.
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