Fully optical switching memory based on an oxidized GQD–FeOx heterojunction with 106 negative photoconductance ratio
Abstract
A fully optical control device can provide positive photoconductance memory (PPM) and negative photoconductance memory (NPM), enabling the device to execute fully optical computing. However, the NPM triggering involves complex modulation and small ratio. Here, we propose an oxidized GQD–FeOx heterojunction optoelectronic memory that integrates the PPM and NPM effects into the same cell, thus building all-in-one fully optical computing. The PPM originates from the electrons that are generated from neutral Vo sites under low resistance state while the NPM effect with an ultrahigh ratio of 106 is contributed by the increase in neutral Vo under high resistance state. The theory calculation illustrates that the NPM effect heavily relies on the geometric confinement and partial reflections of the oxidized GQDs and the localization effect of the FeOx. This work provides a significant structure design and photogenerated electron dynamic for the development of fully optical computing.
Article Details
Journal Info
Applied Physics Letters
American Institute of Physics
Authors (10)
Lie Luo
School of Physics and Electronic Science, Zunyi Normal University 1 , Zunyi 563006,
Xiude Yang
School of Physics and Electronic Science, Zunyi Normal University 1 , Zunyi 563006,
Ping Li
Bo Wu
Jin Ye
Department of Pharmaceutics, State Key Laboratory of Natural Medicines, China Pharmaceutical University
Xiaofang Hu
Key Laboratory of Luminescence Analysis and Molecular Sensors, College of Artificial Intelligence, Southwest University 2 , Chongqing,
Jie Li
Songling Wang
State Key Laboratory of Structural Chemistry, Chinese Academy of Sciences Fujian Institute of Research on the Structure of Matter 3 , Fuzhou 350002,
Bai Sun
Frontier Institute of Science and Technology Interdisciplinary Research Center of Frontier science and technology State Key Laboratory for Strength and Vibration of Mechanical Structures Engineering Research Center of Key Materials for Efficient Utilization of Clean Energy of Shaanxi Province Xi'an Key Laboratory of Electronic Devices and Material Chemistry Institute of New Concept Sensors and Molecular Materials Shaanxi Key Laboratory of New Conceptual Sensors and Molecular Materials Xi'an...
Guangdong Zhou