The Photoelectric Sensing of a MoS3-MoO3-Poly-2-Aminothiophenol/Polypyrrole Optoelectronic Device with Solar Cell-Like Characteristics

The synthesis of an optoelectronic device with solar cell-like characteristics is carried out via a one-pot process to create a MoS₃-MoO₃-poly-2-aminothiophenol/polypyrrole (MoS₃-MoO₃-P2ATP/Ppy) structure. In this device, the MoS₃-MoO₃-P2ATP component serves as the n-layer, while Ppy functions as the p-type material. The n-layer exhibits exceptional optical absorption across a wide spectrum, ranging from ultraviolet (UV) to infrared (IR), characterized by a narrow bandgap of 1.8 eV. The performance of the MoS₃-MoO₃-P2ATP/Ppy device is evaluated based on its wide optical absorption, which spans most of the visible light spectrum. The device demonstrates current density (J_ph) of 0.32 mA/cm² under general light illumination. When exposed to monochromatic light at 340 nm, the J_ph value decreases slightly to 0.29 mA/cm². In addition, the photoresponsivity (R) and detectivity (D) of the device are determined, yielding an R-value of 1.47 mA/W and a peak D-value of 3.28 × 10⁸ Jones at 340 nm. These metrics emphasize the device’s efficiency in converting incoming light into electrical current, indicating its strong potential as a highly sensitive photodetector. Additionally, the device’s solar cell characteristics are assessed through its short-circuit current (J_SC) and open-circuit voltage (V_OC). The J_SC is recorded at 2.8 µA/cm², while the V_OC reaches 0.09 V, demonstrating the device’s capability to generate current and voltage under light exposure. Given the outstanding optical advantages and technical performance of this thin-film device, it is recommended for industrial applications as a thin-film sensor for photon sensing and solar cells. The potential to harness renewable energy through this device positions it as a valuable contributor to sustainable energy sources, aligning with the global push for clean and renewable energy solutions.