Fig. 3: The performance of Cs-Pb-Br PeLEDs. | Nature Communications

Fig. 3: The performance of Cs-Pb-Br PeLEDs.

From: Efficient and large-area all vacuum-deposited perovskite light-emitting diodes via spatial confinement

Fig. 3

a The diagram of PeLED structure. b The normalized electroluminescence spectra of Cs/Pb = 1.56 and Cs/Pb = 1.24, the inset is the photo of a Cs/Pb = 1.24 LED driven at 4 V. c Current density and luminance versus voltage characteristics of the PeLEDs. d EQE-current density curves of these two devices. e The EQE summary of thermally evaporated PeLEDs so far reported25,26,27, 36, 51,52,53,54,55. f Operational stability of devices at an initial luminance of 100 cd/m2. g The simulated radiative efficiency evolution with carrier density by using the fitted recombination constants. h The normalized radiative efficiency η as a function of the carrier density. i The effect of k1 and k2 on the radiative efficiency with k3 fixed. k1/10 means k1 is 107 while k2 remains invariable (10−9).

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