Localized Surface Plasmon Resonance-Mediated Charge Trapping/Detrapping for Core–Shell Nanorod-Based Optical Memory Cells

• Published in: ACS applied materials & interfaces Vol. 9; no. 39; pp. 34101 - 34110
• Main Authors: Zhou, Li, Han, Su-Ting, Shu, Shiwei, Zhuang, Jiaqing, Yan, Yan, Sun, Qi-Jun, Zhou, Ye, Roy, V. A. L
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 04-10-2017
• Subjects: LSPR; multilevel data storage; organic memory; Au@Ag nanorods; phototunable
• ISSN: 1944-8244; 1944-8252
• DOI: 10.1021/acsami.7b07486

For following the trend of miniaturization as per Moore’s law, increasing efforts have been made to develop single devices with versatile functionalities for Internet of Things (IoT). In this work, organic optical memory devices with excellent dual optoelectronic functionality including light sensing and data storage have been proposed. The Au@Ag core–shell nanorods (NRs)-based memory device exhibits large memory window up to 19.7 V due to the well-controlled morphology of Au@Ag NRs with optimum size and concentration. Furthermore, since the extinction intensity of Au@Ag NRs gradually enhance with the increase in Ag shell thickness, the phototunable behaviors of memory device were systematically studied by varying the thickness of Ag shell. Multilevel data storage can be achieved with the light assistant. Finally, the simulation results demonstrate that the phototunable memory property is originated from the multimode localized surface plasmon resonance (LSPR) of Au@Ag NRs, which is in consistent with the experimental results. The Au@Ag core–shell NRs-based memories may open up a new strategy toward developing high-performance optoelectronic devices.