GaN LEDs suffer from the efficiency droop, limiting their use in applications like general lighting and projection displays. Different mechanisms have been held responsible for the droop. Different technological solutions have correspondingly been devised, and discriminating experiments have been proposed. We will report on a systematic analysis of above aspects (mechanisms, solutions, and experiments) carrier out by means of numerical device simulations and their comparison with experimental results. Aims are (i) to improve the insight into the droop mechanism(s), (ii) to provide guidelines for LED optimization
Analysis of efficiency-droop mechanisms in GaN-based light-emitting diodes, related technological solutions and discriminating experiments
MENEGHINI, MATTEO;MENEGHESSO, GAUDENZIO;ZANONI, ENRICO;
2011
Abstract
GaN LEDs suffer from the efficiency droop, limiting their use in applications like general lighting and projection displays. Different mechanisms have been held responsible for the droop. Different technological solutions have correspondingly been devised, and discriminating experiments have been proposed. We will report on a systematic analysis of above aspects (mechanisms, solutions, and experiments) carrier out by means of numerical device simulations and their comparison with experimental results. Aims are (i) to improve the insight into the droop mechanism(s), (ii) to provide guidelines for LED optimization
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