Chemical structures of the donor (a) and the acceptor molecules (b) in the EML of the OLEDs.
Characteristics of the luminance (closed marks) and the current density (open marks) under the high-voltage pulses of durations , , and .
Luminance as a function of applied voltage for the different sized OLEDs in the pulse drive scheme.
Luminance as a function of voltage for the pulsed OLEDs with the different thickness of ETL.
Luminance from an OLED with coumarin as EML under the pulse-driven voltages of durations , , and . Shown in the inset is an EL emission spectral for two types of OLEDs with different acceptor concentrations in donor, 1.0% rubrene in and 0.4% rubrene in (solid line).
Current efficiency of OLEDs with different thickness of light-emitting layer driven by pulse voltages.
Current density and luminance vs voltage for the OLED using DSB in DCBP as a light-emitting layer.
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