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curves of the devices using Al (●) and (엯) as the device cathode.
The luminescence efficiency vs current for the devices applying Al (●), (엯), (∎), (◻), (▴), and (▵) as the cathode, respectively.
Fowler–Nordheim plots, vs , for the devices with Al(●) and (엯) cathode. The arrows pointed at FN curves are the light turn-on voltages in Fig. 1. The inset plot shows the curves for above devices at the hole-dominant regime.
curves of the devices applying (∎), (◻), (▴), and (▵) as the cathode, respectively. The inset plot shows an enlarged look at the curves around the device light turn-on voltage.
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