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A route to improved extraction efficiency of light-emitting diodes
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View: Figures


Image of FIG. 1.
FIG. 1.

Typical curve of the diode, revealing good rectifying behavior with a turn-on voltage of about 10 V. Note that the dashed line is a guide to the eyes. The inset illustrates the structure of the ADH LED.

Image of FIG. 2.
FIG. 2.

Room-temperature EL spectra of the ADH diode collected from the top and bottom surface under the same injection current, note that the spectrum from the bottom surface has been magnified by three times.

Image of FIG. 3.
FIG. 3.

Normalized PL spectra of the structure and layer. The inset shows the diagram of the band alignment of the ADH diode under forward bias.

Image of FIG. 4.
FIG. 4.

The integrated EL intensity recorded from the top and bottom surface of the diode by bonding a GaN/sapphire template on the MgZnO surface at room temperature, revealing significant enhancement in the light extraction from the top surface.

Image of FIG. 5.
FIG. 5.

(a) The simulation of the two-dimensional optical field pattern in the device. (b) The computed optical field distribution in the ADH structure with the indicated refractive index and thickness of each layer.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: A route to improved extraction efficiency of light-emitting diodes