Fig. 1. Schematic of preparation process for all-solution processed OLED

Fig. 2. Three-dimensional morphology and FFT images of luminescent film spin-coated at different rotation speeds

Fig. 3. AFM morphology of luminescent layer spin-coated at different rotation speeds

Fig. 4. Schematic diagram of the device structure

Fig. 5. Photoelectric performance of OLED at different PEIE concentrations

Fig. 6. Sheet resistance and transmittance of PEDOT：PSS films after acid post-treatments

Fig. 7. Morphology of PEDOT：PSS films spin-coated at the different speeds

Fig. 8. Photoelectric performance of all-solution processed OLED