Abstract
The current dependences of the output optical power and emission spectral characteristics, including their distribution (mapping) over the emitting surface, of vertical AlInGaN LEDs in a wide range of operating currents up to ~ 70A have been studied. Analysis of the current dependence of the LED optical power and emission spectrum reveals that, starting from a certain level of excitation, it is incorrect to use the value of the average current density when interpreting the ìefficiency dropî. The effect of ìcurrent crowdingî around the contacts becomes the main factor in reducing internal quantum and light extraction efficiency, limiting the energy capabilities of the LED.
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