Low‐Power Optoelectronic Hybrid Perovskite‐Based Memristor for Ternary Hardware Security Monitoring

Secure intelligent electronics with high integration and adaptability are critical for next‐generation information systems. However, previously reported hardware systems typically employ separate sensing, memory, and processing modules, leading to increased system complexity, high latency, and energy inefficiency. Here, high‐quality hybrid perovskite nanoplates are synthesized and utilized to construct optoelectronic memristors. The device exhibits broadband self‐powered photodetection and reliable resistive switching, with a remarkably low setting power (≈1.21 pW) and an ultra‐high on/off ratio (≈10 6 ). By leveraging optically and electrically programmed states, the device enables reconfigurable access control and real‐time security monitoring within a 3 × 3 array. The implementation of ternary logic states enables both spatially and state‐dependent access patterns with an ultra‐low write energy (≈3.8 fJ/bit). The device achieves higher information density and enhanced hardware security monitoring without the need for additional logic circuits, offering strong potential for secure access management, intelligent sensor networks, and energy‐efficient multifunctional electronics.