Direct Determination of the Internal Quantum Efficiency of Light‐Emitting Diodes. Issue 1 (26th October 2022) - Pristovsek, Markus
Abstract : The maximum internal quantum efficiency (IQE) of light‐emitting diodes (LEDs) can be obtained using the so‐called ABC model. Since the ABC model is based on the experimentally not directly accessible carrier density, the light over current data is usually fitted as a function of the light output to yield the maximum IQE. This article shows a method to directly obtain the IQE from experimental data without fitting, which also reflects changes of the A, B, or C parameters over the current range. Abstract : By plotting the light output over current data of light‐emitting diodes (LEDs) in the right way based on the ABC model, one can directly obtain the peak internal quantum efficiency. This new way of plotting even allows for current‐induced changes of the A, B, and C parameters, giving more information than the traditional peak fit.