Design and Optical Characterization of Novel InGaN/GaN Multiple Quantum Well Structures by Metal Organic Vapor Phase Epitaxy KU Leuven
Various multiple quantum well structures with three main geometries of triangular, isosceles trapezoidal, and right-angled trapezoidal shape have been designed and fabricated on 4-in. sapphire substrates by metal organic vapor phase epitaxy. Photoluminescence measurements reveal the influence of the quantum well structures on the emission wavelength and the internal quantum efficiency. We observe less decrease in the internal quantum efficiency ...