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Energy (conduction and valence) band profile of (Al,In) GaN blue LEDs. (Energies are offset for clarity.) Type A adapts p- SLs for EBL and type B does p- for EBL.
L-I-V curve of the InGaN blue LED measured under cw operation condition for type (a) A and (b) B depends on temperature variation, respectively.
EQE of type (a) A and (b) B as a function of temperature. Inset of (a) shows suppressed EQE drop for temperature increase, while inset of (b) presents conventional EQE drop for temperature increase.
Electron and hole concentration at fifth QW and its ratio for type A and B with temperature variation.
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