We report on the comparative photoluminescence studies of AlGaN/GaN, GaN/InGaN, and AlInGaN/InGaN multiple quantum well(MQW) structures. The study clearly shows the improvement in materials quality with the introduction of indium. Our results point out the localized state emission mechanism for GaN/InGaN structures and the quantum well emission mechanism for AlInGaN/InGaN structures. The introduction of indium is the dominant factor responsible for the observed differences in the photoluminescence spectra of these MQW structures.
Published in Applied Physics Letters, Volume 77, Issue 17, 2000, pages 2668-2670.
©Applied Physics Letters 2000, American Institute of Physics (AIP).
Zhang, J., Yang, J., Simin, G., Shatalov, M., Khan, M. A., Shur, M. S., & Gaska, R. (23 October 2000). Enhanced Luminescence in InGaN Multiple Quantum Wells with Quaternary AlInGaN Barriers. Applied Physics Letters, 77 (17), 2668-2670. http://dx.doi.org/10.1063/1.1319531