2D MoS2 Nanosheets-PANI Derived Nanojunctions for Highly Responsive and Energy-Efficient Metal–Semiconductor–Metal Photodetectors

The exceptional properties of two-dimensional (2D) materials have contributed to significant advancements in optoelectronics (OPs). While various effective methods exist for enhancing photodetector (PD) responsivity, the constrained spectral range persists as a limiting factor of the device. This study demonstrates the ability to create a p-n heterojunction between 2D molybdenum disulfide (MoS₂) nanosheets and polyaniline (PANI) for metal–semiconductor–metal (MSM) PDs using a solution-processed approach on PET substrate. We evaluated the MoS₂-PANI nanohybrid PD device across the visible and ultraviolet (UV) spectra. When exposed to UV and visible light irradiation, the estimated maximum responsivities of the fabricated PD are 29.98 AW^–1 and 73.32 AW^–1, respectively. This is significant when compared with the earlier research on broadband PDs. We create a pathway for developing highly responsive broadband PDs by integrating organic and inorganic materials. These innovations hold promise for various applications in security, healthcare, and beyond.