Shun Tian, Chen Zou, Runchen Lai, Chungen Hsu, Xuhui Cao, Shiyu Xing, Baodan Zhao, Dawei Di. Additive and interfacial control for efficient perovskite light-emitting diodes with reduced trap densities[J]. Journal of Semiconductors, 2022, 43(5): 050502

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- Vol. 43, Issue 5, 050502 (2022)

Fig. 1. (Color online) SCLC analyses for MCFPB and MCFPB-C perovskite films. Current–voltage characteristics of devices with structures of (a) ITO/NiOx /PVK/MCFPB/MoOx /Ag, (b) ITO/NiOx /PVK/MCFPB-C/MoOx /Ag, (c) ITO/NiOx /PVK/LiF/MCFPB/MoOx /Ag and (d) ITO/NiOx /PVK/LiF/MCFPB-C/MoOx /Ag.

Fig. 2. (Color online) Characterization of PeLEDs. (a) Device structure. (b) The energy levels of the device functional layer materials. (c) J–V–L and (e) EQE–J curves of devices based on ITO/NiOx /PVK/(with or without)LiF/MCFPB/TPBi/LiF/Al. (d) J–V–L and (f) EQE–J curves of devices based on ITO/NiOx /PVK/(with or without)LiF/MCFPB-C/TPBi/LiF/Al. Inset: a photograph of a working device. (g) Simulated power distribution of a PeLED with isotropic emitter orientation. The dashed lines divide the graph into four regions: (1) direction emission, (2) substrate mode, (3) waveguide mode, and (4) surface plasmon mode. (h) Fractional power distribution of different optical modes in PeLEDs as a function of perovskite layer thickness.

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