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(Color online) Output power of the NUV LEDs as a function of polarization and bandgap energy of AlGaN EBL at 100 mA. The red open-circle indicates the polarization and output power for each specific bandgap of the EBL.
(Color online) Schematic diagrams of the EBLs of original structure, LED A, and LED B.
(Color online) Energy band diagrams near the EBLs of (a) original structure, (b) LED A, and (c) LED B at 100 mA. The shaded areas represent the positions of QWs and EBL, respectively.
(Color online) Electron current density near the EBLs of the three LEDs at 100 mA.
(Color online) (a) Electron and (b) hole concentrations within the active region of the three LEDs at 100 mA. The horizontal positions of LEDs A and B have been appropriately adjusted for easy comparison.
(Color online) (a) L-I and (b) I-V characteristics of the three LEDs.
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