Nurul Putri Wulandari, Andy Choerullah, Arif Nur Afandi, Nik Ahmad Nizam Nik Malek, Nandang Mufti, Sunaryono Sunaryono
This study aims to develop an active photodetector material based on a nano composite thin film of Mn0.75Fe2.25O4/ZnO/PVP/PABS. This material has been successfully synthesized using a multi-method approach, including co-precipitation for Mn0.75Fe2.25O4, sol-gel processing for ZnO, and dual-solution polymerization to produce PABS. X-ray diffraction revealed high crystallinity, with Mn0.75Fe2.25O4 crystallite sizes of 5.25-8.21 nm and ZnO crystallite sizes of 11.19-17.60 nm, corroborated by transmission electron microscopy (11.00-17.33 nm). VSM tests uncovered superparamagnetic behavior, with saturation magnetization (Ms) values decreasing from 13.97 to 8.02 emu g−1 as ZnO content increased. UV-Vis spectroscopy indicated band gap energies of 3.15-3.57 eV, refractive indices of 1.87-2.13, optical conductivities of (8.50-9.68) × 107 S cm−1, and electrical conductivities of 25.91-29.52 S cm−1. Photodetector performance testing demonstrated rise times of 0.11-1.11 s and decay times of 0.99-2.53 s, reflecting a fast and stable response under visible light illumination. The novelty of the study lies in the integration of four components, including Mn0.75Fe2.25O4 nanoparticle, ZnO semiconductor, PVP matrix polymer, and conductive PABS polymer, into an inorganic-organic hybrid nano-composite thin film fabricated via spin coating. These findings offer a cost-effective and highly applicable alternative for photodetector materials in future optical sensor technologies. © 2025 The Electrochemical Society (“ECS”). Published on behalf of ECS by IOP Publishing Limited. All rights, including for text and data mining, AI training, and similar technologies, are reserved.
Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Malang, 65145, Indonesia; Department of Electro Engineering, Faculty of Engineering, Universitas Negeri Malang, Malang, 65145, Indonesia; Department of Biosciences, Faculty of Science, Universiti Teknologi Malaysia (UTM), UTM, Johor, 81310, Malaysia; PUI-Centre of Advanced Materials for Renewable Energy (CAMRY), Universitas Negeri Malang, Malang, 65145, Indonesia
