Fig. 2: Angle-resolved EL spectra and efficiency characterization.
From: A substrateless, flexible, and water-resistant organic light-emitting diode
a 2D map of normalized, angle-resolved EL spectra of substrateless OLEDs with different lower TFE barriers and for a rigid reference device on display-grade glass. Recorded at constant current density of 7.5, 7.0, 6.2, and 3.1 mA cm−2 for the glass, P/N/P, P/N/P/A, and P/N/P/N devices, respectively. b Current density (solid lines) and luminance (dashed lines) versus voltage for same devices. c External quantum efficiency and d power efficacy of OLEDs, calculated assuming a Lambertian emission profile (open symbols) and corrected for the actual angular emission profile (closed symbols).
