Fig. 1. Core/shell (a) and inverted core/shell (b) structures of QDs.
Fig. 2. Plots of binding energy of exciton state in GaN/AlxGa1−xN core/shell QD versus core radius R1 for different values of shell R2. The Al content x is chosen to be 0.3.
Fig. 3. Variation of (a) radiative lifetime and (b) overlap integral of exciton state in GaN/AlxGa1−xN core/shell QD with core size R1 and shell size R2, with Al content x chosen to be 0.3.
Fig. 4. (a) Variations of OAC of exciton state in GaN/AlxGa1−xN core/shell QD with photon energy under different values of core size R1 at shell size R2 = 10 nm, and (b) variation of overlap integral of exciton state in GaN/AlxGa1−xN core/shell QD with core size R1 at R2 = 10 nm, with Al content x chosen to be 0.3.
Fig. 5. Variations of binding energy of exciton state in AlxGa1−xN/GaN inverted core/shell QD with core size R1 for different values of shell size R2, with Al content x chosen to be 0.3.
Fig. 6. Variations of (a) radiative lifetime and (b) overlap integral of exciton state in AlxGa1−xN/GaN inverted core/shell QD with core size R1 for different values of shell size R2, with Al content x chosen to be 0.3.
Fig. 7. (a) Variations of OAC of exciton state in AlxGa1−xN/GaN inverted core/shell QD with photon energy for different values of core size R1 at R2 = 10 nm (a), and (b) variastion of overlap integral of exciton state in AlxGa1−xN/GaN inverted core/shell QD with the core size R1 at R2 = 10 nm (b), with Al content x chosen to be 0.3.
| Eg(0)/meV | | | ε* |
---|
GaN | 3299a | 0.15a | 0.27b | 10.74b | AlN | 4900a | 0.25a | 0.47b | 8.41b |
|
Table 1. Parameters used in calculation.