Figure 5

Electroluminescence measurements and I-V curves.
(a) EL spectra of deep-UV LED samples without Al NPs (black line) and with Al NPs deposited on the top surface at 75° (red line) as well as the enhancement ratio between them (blue line). The EL measurement was performed from the bottom side of the LEDs. (b) Current versus applied voltage (I-V curves) of samples A (black line) and D (red line).