Fig. 2From: Influence of indium-tin-oxide and emitting-layer thicknesses on light outcoupling of perovskite light-emitting diodesa Spectra of the extinction coefficients of perovskite, poly-TPD, ITO, and TPBi. The normalized photoluminescence spectrum of the perovskite layer is also included. b Contour plot of the maximum achievable EQE of the PeLED as a function of ITO and perovskite thicknessesBack to article page