Fig. 5: Lifetime measurements. | Nature Communications

Fig. 5: Lifetime measurements.

From: High efficiency blue organic light-emitting diodes with below-bandgap electroluminescence

Fig. 5: Lifetime measurements.The alternative text for this image may have been generated using AI.

a Variation of normalized luminance vs. time and driving voltage vs. time for initial luminance of 1000 or 5000 cd m−2. b Electroluminescence spectra of the fresh and degraded device. TOF-SIMS profiles of the c fresh and d degraded OLED stack: the x-axis represents the materials depth distribution starting with the cathode interface from data point 0 and reaching to the ITO anode electrode.

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