Comparative Analysis of the Electroluminescence Efficiency in Type-I and Type-II Heterostructures Based on III–V Narrow-Gap Compounds.

We study in detail the mechanisms of radiative and Auger recombination in type-I and type-II heterostructures based on III–V narrow-gap materials. The presence of a heterointerface fundamentally changes the nature of these recombination processes with respect to the bulk material differently, depending on the type of heterojunction. Studying the electroluminescence of type-I and type-II light-emitting diode (LED) heterostructures based on InAsSb/InAs(Sb,P) quantum wells is presented. An increase in the relative efficiency of radiative recombination in the type-II heterostructure due to the suppression of Auger recombination favors the formation of intense stimulated emission in such heterostructures at low temperatures (4.2–70 K). [ABSTRACT FROM AUTHOR]