State-of-the-art of Synthesized PANI/NiCo2O4/CeO2 Nanocomposites by One-Step Polymerization for Use in Photodetectors

A novel PANI/NiCO₂O₄/CeO₂ nanocomposite was prepared using the binary Nano metal oxide NiCo₂O₄/CeO₂ with aniline and ammonium persulfate (APS) via a one-step polymerization and drop throwing system. The nanocomposite was explored by X-ray diffraction (XRD) analysis confirmed the successful integration of nanoparticles into PANI. UV-visible spectroscopy revealed absorbance peaks characteristic of PANI combined with nano metal oxides. Raman spectroscopy further verified the nanocomposite’s structure, with peaks at 415, 517, 575, and 640 cm^− 1 attributed to CeO₂ and NiCo₂O₄ nanoparticles within the PANI matrix. Field emission scanning electron microscopy (FE-SEM) and energy dispersive X-ray spectroscopy (EDX) analyses of the doped PANI showed nanostructures ranging from 18.40 to 23.28 nm. Photodetection properties such as responsivity (R_λ), detectivity (D*), and external quantum efficiency (QE) of porous silicon nanocomposites were assessed using the drop-casting method. The incorporation of Ag/PANI-NiCo₂O₄-CeO₂/PSi/Si/Ag enhanced the ideality factor of porous silicon. At wavelengths of 350–900 nm, the values of R_λ, D*, and QE were measured at 0.37 A/W, 5.3 × 10^12 cmHz^1/2/W, and 110%, respectively.