We report, for the first time, operation frequency dependence of current density-voltage (JOLED-VOLED) shift for multi-layer organic light-emitting diodes (OLEDs). When the OLEDs were electrically stressed for 21 hours with 50% duty voltage pulses at 60, 120, 240, and 360 Hz, the JOLED-VOLED shifts were suppressed by half for 360 Hz operation compared with 60 Hz operation, but with little change in emission efficiencies. This frequency dependent JOLED-VOLED shift is believed to be commonly observed for typical multi-layer OLEDs and can be used to further improve lifetime of digitally-driven active-matrix OLED displays.
© 2012 Optical Society of Korea
Original Manuscript: April 13, 2012
Revised Manuscript: May 2, 2012
Manuscript Accepted: May 3, 2012
Published: June 25, 2012
Hyun-Jong Kim, Su-Hwan Kim, and Yong-Taek Hong, "Frequency Dependency of Multi-layer OLED Current Density-voltage Shift and Its Application to Digitally-driven AMOLED," J. Opt. Soc. Korea 16, 181-184 (2012)
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