Study on Enhancement of Optical Output of InxGa1-xN/GaN Parabolic Quantum Well LEDs, Varying Indium Compositions, and Well Widths

The variations of the transition energy (TE) as well as transition probability (TP) with current for various indium (In) concentrations and different QW widths have been investigated for InxGa1-xN/GaN parabolic QW LEDs. A set of data for blue light emissions (2.75 eV) has been obtained for different indium mole fractions and well widths. Important observation is that for emission energy of 2.75 eV, parabolic QW LEDs provide maximum TP if the In mole fraction and well width are 0.23 and 28 Å, respectively. For further studies, these observations can be considered for InxGa1-xN/GaN parabolic QW LEDs in order to achieve higher optical output for blue light emissions.