Influence of indium content and temperature on Auger-like recombination in InGaN quantum wells grown on (111) silicon substrates

High-efficiency InGaN-based light-emitting diodes have been grown on (111) silicon substrates and investigated with regard to efficiency and carrier lifetime as a function of current density. Using a single quantum well active layer ensures a well-defined active volume which enables the precise determination of the recombination coefficients in the ABC rate model for different emission wavelengths and junction temperatures. Good agreement of the resulting C values with calculated Auger coefficients is found both with respect to absolute value as well as their dependence on bandgap energy and temperature. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4754688]