fig5

Figure 5. Electrical properties of pristine and Sn:DH-based PeLED. (A) Current density-voltage characteristics of two devices. Inset shows the PeLED structure; (B) Luminance-voltage characteristics of pristine and Sn:DH, with an inset image of the Sn:DH-based PeLED; (C) CIE diagram showing the green emission of the two PeLEDs; (D) Operational stability at 100 cd m^-2 until the luminance decreased to 50% of its initial value. DH: Dopamine hydrochloride; PeLEDs: perovskite light-emitting diodes; CIE: Commission Internationale de l'éclairage.