fig11
Figure 11. (A) Energy level diagram of the OLED with a CuI layer[128]. Copyright 2022 Elsevier B.V.; (B) OLED properties including power efficacy, current efficacy, current density, and luminance, comparing different types of HIL: nanocrystalline CuI, amorphous CuI, and PEDOT:PSS[128]. Copyright 2022 Elsevier B.V. OLED: Organic light emitting diode; CuI: copper iodide; HIL: hole injection layer; PEDOT:PSS: poly(3,4-ethylenedioxythiophene) polystyrene sulfonate.