Fig. 1. Structure of blue fluorescent OLED.
Fig. 2. Schematic diagram of current-voltage-luminance and impedance measurement system for frequency response characteristic of OLEDs.
Fig. 3. Electroluminescent intensity vs frequency characteristics of OLED with AC application.
Fig. 4. Equivalent circuit of OLED with AC.
Fig. 5. Cole-Cole plot of blue fluorescent OLED.
Fig. 6. Electroluminescent intensity vs frequency characteristics of OLED with AC sine and square wave application.
Fig. 7. Luminance vs peak voltage characteristics of OLED with various AC wave application.
Fig. 8. Electroluminescent intensity vs frequency characteristics of OLED with various AC wave application.
Fig. 9. Fourier series of various waveform.
Fig. 10. Electroluminescent intensity vs frequency characteristics of OLED with AC full and half square wave application.
Table 1. Comparison of cut-off frequency. A: cut-off frequency of OLED driven by sine wave, B: cut-off frequency of OLED driven by square wave, and C: cut-off frequency by impedance measurement of OLED.
Table 2. Comparison of cut-off frequency with impedance measurement and simulation.
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