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. 2019 Feb 4;9(8):4336–4343. doi: 10.1039/c8ra10393c

Fig. 6. (a) Schematic representation and energy diagram of the OLED structure. (b) Electroluminescence spectra at different current densities. (c) Current density–voltage-luminance characteristic and (d) external quantum efficiency as a function of the current density.

Fig. 6