PROJECT TITLE :

Experimental Demonstration of Time-Dependent Breakdown in GaN-Based Light Emitting Diodes

ABSTRACT:

This letter reports the first experimental demonstration of your time-dependent breakdown in GaN-primarily based lightweight-emitting diodes (LEDs); based on a variety of constant voltage stress tests, meted out below the breakdown limit of the devices, we have a tendency to show that: one) when submitted to reverse-bias stress, the LEDs show a gradual increase in current, well correlated with a rise in the breakdown luminescence signal; a pair of) for sufficiently long stress times, the LEDs will reach a catastrophic (sudden) breakdown, that results in the failure of the devices; 3) the breakdown method is time-dependent and also the time to failure (TTF) has an exponential dependence on stress voltage; and 4) TTF is Weibull distributed. The results presented inside this letter demonstrate that the GaN-based heterostructures will show a TDDB-like behavior, and can be useful for the interpretation of the degradation knowledge of LEDs and HEMTs.


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