OPTICAL-TRANSITIONS IN INGAN ALGAN SINGLE QUANTUM-WELLS/

The optical transitions in InGaN/AlGaN single quantum wells (SQWs) gro wn by metal-organic chemical vapor deposition have been studied, The s pectral lineshape and the recombination dynamics of the optical transi tions have been systematically investigated at different conditions. I t was found that the main photoluminescence (PL) emission line in thes e SQW was contributed predominantly by the localized exciton recombina tion. However, time-resolved PL results revealed the presence of a ban d-to-impurity transition which cannot be resolved spectroscopically fr om the localized exciton transition line due to the broad emission lin ewidth. (C) 1997 American Vacuum Society.