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. 2020 Feb 5;12(9):10727–10736. doi: 10.1021/acsami.9b21394

Figure 5.

Figure 5

(a) Voltage–current density and voltage–luminance curves of the OLEDs. (b) External quantum efficiency dependence on the luminance of the OLEDs. Inset: electroluminescence spectra of devices at a driving voltage of 9 V.