Fig. 5: Characterizations of large-area and small-area PeLEDs of quasi-2D perovskite films with different <n>-values. | Nature Communications

Fig. 5: Characterizations of large-area and small-area PeLEDs of quasi-2D perovskite films with different <n>-values.

From: High-performance large-area quasi-2D perovskite light-emitting diodes

Fig. 5

a Cross-sectional SEM image of the corresponding PeLED device. b Digital photo of the large-area PeLED device operated under biased voltage of 4.5 V (<n> = 3), with active areas of 9.0 cm2. c Normalized EL spectra for different <n>-value devices. d Current density–luminance–voltage (J–L–V) and e EQE–current density (EQE–J) characteristics of large-area PeLEDs, with an active area of 9.0 cm2. f EQE–J curves of small-area PeLEDs, with an active area of 0.086 cm2.

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