Low‐Voltage, Optoelectronic CH3NH3PbI3−xClx Memory with Integrated Sensing and Logic Operations

• Published in: Advanced functional materials 2018-04, Vol.28 (15), p.n/a
• Main Authors: Zhou, Feichi, Liu, Yanghui, Shen, Xinpeng, Wang, Mengye, Yuan, Fang, Chai, Yang
• Format: Article
• Language: English
• Subjects: coincidence detection; Computer memory; Data processing; Data storage; Detection; Electric potential; Electromagnetic absorption; Internet of Things; Logic; logic operations; Materials science; Memory devices; Optical communication; optoelectronic memory; Optoelectronics; perovskite; Perovskites; Power consumption; resistive switching memory; Smart sensors
• ISSN: 1616-301X; 1616-3028
• DOI: 10.1002/adfm.201800080

Nonvolatile optoelectronic memories integrated with the functions of sensing, data storage, and data processing are promising for the potential Internet of things (IoT) applications. To meet the requirements of IoT devices, multifunctional memory devices with low power consumption and secure data storage are highly desirable. This study demonstrates an optoelectronic resistive switching memory integrated with sensing and logic operations by adopting organic–inorganic hybrid CH3NH3PbI3−xClx perovskites, which possess unusual defect physics and excellent light absorption. The CH3NH3PbI3−xClx cell exhibits low operation voltage of 0.1 V with the assistance of light illumination, long‐term retention property, and multiple resistance states. Its unique optoelectronic characteristics enable to perform logic operation for inputting one electrical pulse and one optical signal, and detect the coincidence of electrical and optical signal as well. This design provides possibilities for smart sensor in IoT application. Optoelectronic CH3NH3PbI3−xClx perovskite resistive switching memory is designed and fabricated. The memory cell exhibits a low operation voltage of 0.1 V with the assistance of light illumination, long‐term retention, and light sensing properties, and can perform logic operations by inputting electrical and optical signals. This device provides possibilities for reducing the complexity in smart sensor design for Internet of things applications.