Abstract
To realize in-memory sensing and computing platforms, it is essential to integrate sensing, computation, and memory functionalities within a single device, enabling energy- and time-efficient vision systems with high perceptual precision. However, achieving such multi-functional processing capability within a compact device structure remains a major challenge. Here, a reconfigurable vertical photodiode based on α-In2Se3 is presented, a ferroelectric 2D semiconductor. Gradual and reversible modulation of built-in electric fields at the top and bottom Schottky junctions is achieved through partial out-ofplane polarization switching of α-In2Se3, enabling multi-level, non-volatile, and polarity-tunable photoresponsivity. This allows analog programmability with a high degree of freedom in processing within a two-terminal metal-ferroelectric semiconductormetal (MFsM) structure, effectively resolving trade-off between structural compactness and computing versatility. Leveraging these intrinsic characteristics, we demonstrate a versatile sensor-level perceptual processing framework using a reconfigurable photodiode crossbar array. By exploiting the high-density spatial integration capability, the system adaptively configures its spatial support to prioritize either suppressing environmental noise for robust feature extraction or preserving fine-grained details for precise classification, depending on the task requirements. These results lay the foundation for highly scalable and energy-efficient neuromorphic vision system with high perceptual precision.
NETL
NSTL
Wiley