Fig. 3: Simulation of the cavity mode and the SRI for beam-shaping OLEDs.
From: Real-time beam shaping without additional optical elements

Calculated cavity modes are shown for an OLED in the optical maximum (a) and the optical minimum (c), respectively; (b) Normalized PL spectra for the red emitters used. The peak intensities for both emitters are marked in the cavity modes to clarify the choice of emitter selected. Multiplying the cavity modes with the PL spectra explains the measured SRI as shown in d for forward emission and in e for sideward emission. The spectral difference between the maxima is 48 nm