Fig. 1. Structural and optical characteristics of CsPbBr₃ perovskite films formed on the modified PEDOT:PSS with various ETA ratios. (a) Relative PL spectra and photos of different perovskite films under 400 nm illumination. (b) PLQY of PL. (c) XRD patterns. (d) XRD patterns of crystal orientation (200). (e) SEM images. (f) Grain size.

Fig. 2. Device performance of PeLEDs fabricated on ITO-glass with various ETA ratios in PEDOT:PSS. (a) Device structure of the PeLED. (b) EL spectrum for the PeLED with CsPbBr₃ as the EML. (c) J-V and (d) L-V characteristics. (e) CE as a function of luminance. (f) EQE as a function of luminance.

Fig. 3. Structural and optical characteristics of CsPbBr₃ perovskite films with various PEG ratios. (a) Relative PL spectra and photos of different perovskite films under 400 nm illumination. (b) PLQY of PL. (c) XRD patterns. (d) XRD patterns of crystal orientation (200). (e) SEM images. (f) Grain size.

Fig. 4. (a) EL spectrum for the PeLED with PEG:CsPbBr₃ as the EML. (b) The 1931 International Commission on Illumination (CIE) color coordinate. (c) J-V and (d) L-V characteristics. (e) CE as a function of luminance. (f) EQE as a function of luminance.

Table 1. Summary of the EL Performance of the PeLEDs with Different ETA Doping Concentrations

Table 2. EL Performance of the PeLEDs with Different PEG Concentrations in Perovskite-Emitting Layers