Figure 4
From: Vertical Microcavity Organic Light-emitting Field-effect Transistors

EL emission characteristics of devices.
(a) EL spectra for DBR devices with different thickness of PVP. (b) Spatial distribution of emission intensity for different devices. Normalized EL spectra under different viewing angles for DBR devices with (c) 80 nm Ag, (d) 40 nm Ag. (e) Normalized EL spectra for DBR devices with different thickness of Ag.