• • At 405 nm, the device achieves a responsivity of 3877 A/W and detectivity of 8.1 × 10^12 Jones, surpassing many reported 2D photodetectors; this high sensitivity enables low-light detection in wearable health monitors and imaging arrays.
• • Under 808 nm NIR illumination, responsivity is 1.28 A/W and detectivity 1.2 × 10^9 Jones, demonstrating broadband operation essential for optical communication and night vision.
• • Response times of 0.45 s (rise) and 0.28 s (fall) are competitive for self-powered devices, though slower than some commercial photodiodes; this trade-off is acceptable for many wearable applications where low power consumption is critical.
• • Flexible devices on polyimide retain stable dark current and photocurrent after 500 bending cycles, proving mechanical durability for wearable sensors that undergo repeated deformation.