Fig. 5: Simulation and performance analysis of the ITO-PTAA-CsPbI₃:EuI₂-TiO₂-FTO device.

a Schematics of the simulated ITO-PTAA-CsPbI₃:EuI₂-TiO₂-FTO device structure. b Transmittance (blue) and absorbance (red) spectra perovskite and device. c JV characteristic of the device. Photovoltaic parameters are also indicated.