Cathodoluminescence Characteristics of Linearly-Shaped Staggered InGaN Quantum Wells Light-Emitting Diodes

摘要

Metalorganic chemical vapor deposition (MOCVD) growths of linearly-shaped staggered InGaN quantum wells light-emitting diodes are performed. The use of linearly-shaped staggered InGaN QWs leads to the shift of both electron and hole wavefunction toward the center of the quantum well region with enhanced momentum matrix element, which results in the enhancement of the spontaneous radiaitve recombination rate. The power-density-dependent cathodoluminescence measurements for both conventional and linearly-shaped staggered InGaN QW show 2.5-3.5 times increase in the integrated cathodoluminescence intensity by using the novel active region.