Luminescence of nanostructures based on semiconductor nitrides

Light-emitting diode structures on the basis of (Al, Ga, ln)N solid solutions with and without superlattices were investigated. Experiments in a wide range of temperatures (10—300 K) and noise currents (10 nA — 2 mA) were performed. It was found that the structure with superlattices has a higher stability and better work performance. Apparently, the use of superlattices can compensate for the elastic stresses and piezoelectric fields at the heterointerface. This compensation reduces the formation of dislocations in the structures with superlattices, which increases the intensity of radiation and decreases self-heating effects

The investigation of luminescence properties of nitride-based heterostructures, containing superlattice

The effect of superlattice adding on the luminescence properties of heterostructures based on (Al,In,Ga)N was investigated. It is shown that using structures with two superlattices: the InGaN/InGaN under active region and the AlGaN/GaN as a top p-layer gives the best effect. The elastic stresses on heterointerface of these structure are compensated optimally. As a result they are the most effective and stable functionality