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Modulation bandwidth studies of recombination processes in blue and green InGaN quantum well micro-light-emitting diodes
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10.1063/1.4794078
/content/aip/journal/apl/102/9/10.1063/1.4794078
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/9/10.1063/1.4794078
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Plan view micrograph, showing four representative μ–LEDs. (b) Schematic cross-section of the device structure used.

Image of FIG. 2.
FIG. 2.

Carrier lifetimes obtained through Eq. (4) as a function of the QW carrier density for two representative devices; a 44 μm diameter LED emitting at 450 nm, and a 54 μm diameter 520 nm emitter. (Inset) The A-coefficients deduced from the measured data from micro-LEDs of differing sizes for the two wavelengths.

Image of FIG. 3.
FIG. 3.

Values of the radiative coefficient B obtained from the LI curves for 44 μm diameter 450 nm emitting and 54 μm diameter, 520 nm emitting devices. These are plotted against the carrier densities N obtained through Eq. (5) . Note that the 520 nm data is plotted on an expanded vertical scale. (Inset) LI data for the same two devices.

Image of FIG. 4.
FIG. 4.

(a) The Auger current Ic as defined in Eq. (6) , plotted against N 3 for 44 μm diameter 450 nm emitting and 54 μm diameter, 520 nm emitting devices. The Auger coefficient C is given by the slope of this graph. (b) Values of the Auger coefficient C found in this work and reported in the literature. The red squares show the values of C obtained from the work presented here; each symbol represents the value of C obtained from an individual device. Black open symbols denote experimental 6,7,25 determinations of C found in the literature, while the blue lines show reported theoretical 26 values for C.

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/content/aip/journal/apl/102/9/10.1063/1.4794078
2013-03-05
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Modulation bandwidth studies of recombination processes in blue and green InGaN quantum well micro-light-emitting diodes
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/9/10.1063/1.4794078
10.1063/1.4794078
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