Abstract
The operating current mode dependence of luminescence properties of rubrene-doped yellow organic light-emitting diodes (OLEDs) was investigated. The devices were driven by three types of constant current mode: a simple direct current (DC) mode, a simple alternating current (AC) mode and a pulsed current (PC) mode. The device driven by the AC mode showed low energy efficiency because of the existence of time intervals with no emission in spite of energy consumption. The device driven by the PC mode showed the highest efficiency and better stability compared with the devices driven by the other modes.
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