Self-Powered and Reconfigurable Double-Terminal MoS2 Photodetector for Image Recognition

devices. By applying different voltage pulses to modulate the sulfur vacancy concentration, the device obtains a reversible internal electric field, leading to the bidirectional self-powered photocurrent that switches from negative to positive. This device achieves a fastest response speed of 224 μs and a maximum responsivity of 280 mA/W. Besides, we proposed a resistance-dependent method to achieve stable and reversible responsivity modulation and successfully implement the image processing and object detection using a convolutional neural network (CNN). This work provides a straightforward approach for integrating next-generation optoelectronic devices.