Fig. 3: Power dissipation spectra and outcoupling efficiencies of OLEDs with weak microcavities.

a Power dissipation spectra at λ = 540 nm for the conventional devices and the top-emitting devices, the in-plane wavevector u is normalized with respect to propagation in the emitting layer. b Distribution of all optical loss channels in the top-emitting devices. c Power dissipation spectra of organic emitters with different horizontal dipole ratio Θ in the top-emitting devices. d Outcoupling efficiency ηout of the top-emitting devices and the conventional devices, and their ratios ηoutTE/ηoutBE.