Cup coral-like Mo(VI) oxide-iodide -polypyrrole light sensor device: flexible and highly performant

A novel, highly efficient Mo(VI) oxide-iodide/polypyrrole (MoO₂I₃⁻/Ppy) cup coral-like structure has been developed. This composite is synthesized using an economical oxidative polymerization method. The significant enhancement observed in the material’s morphology of the prepared nanocomposite preserves its optical properties, presenting a promising bandgap of 2.8 eV. This flexible MoO₂I₃⁻/Ppy composite demonstrates exceptional optical properties under various conditions, including exposure to light, monochromatic wavelengths, and darkness. The measured current density (Jph) values indicate the device’s potential, which reflects its sensitivity. Specifically, the recorded J_ph values are 0.6 mA/cm² under general illumination, 0.46 mA/cm² at a 340 nm monochromatic wavelength, and 0.3 mA/cm² in dark conditions. The efficiency and detectivity of the flexible MoO₂I₃⁻/Ppy photodetector have been meticulously assessed. The photoresponsivity (R), measured at 2.34 mA/W, highlights its high capability to convert incident light into discernible electrical signals. The detectivity (D) value of 5.22 × 10⁸ Jones demonstrates the photodetector’s ability to detect weak light signals with remarkable precision. Its high performance, flexibility, and cost-effective production methods make the prepared photodetector an asset in optoelectronics, particularly to sectors seeking reliable and efficient solutions for light detection.