Phototunable biomemory based on light-mediated charge trap

Lv, Z. et al. (2018) Phototunable biomemory based on light-mediated charge trap. Advanced Science, 5(9), 1800714. (doi: 10.1002/advs.201800714) (PMCID:PMC6145397)

206687.pdf - Published Version
Available under License Creative Commons Attribution.



Phototunable biomaterial‐based resistive memory devices and understanding of their underlying switching mechanisms may pave a way toward new paradigm of smart and green electronics. Here, resistive switching behavior of photonic biomemory based on a novel structure of metal anode/carbon dots (CDs)‐silk protein/indium tin oxide is systematically investigated, with Al, Au, and Ag anodes as case studies. The charge trapping/detrapping and metal filaments formation/rupture are observed by in situ Kelvin probe force microscopy investigations and scanning electron microscopy and energy‐dispersive spectroscopy microanalysis, which demonstrates that the resistive switching behavior of Al, Au anode‐based device are related to the space‐charge‐limited‐conduction, while electrochemical metallization is the main mechanism for resistive transitions of Ag anode‐based devices. Incorporation of CDs with light‐adjustable charge trapping capacity is found to be responsible for phototunable resistive switching properties of CDs‐based resistive random access memory by performing the ultraviolet light illumination studies on as‐fabricated devices. The synergistic effect of photovoltaics and photogating can effectively enhance the internal electrical field to reduce the switching voltage. This demonstration provides a practical route for next‐generation biocompatible electronics.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Vellaisamy, Professor Roy
Authors: Lv, Z., Wang,, Y., Chen, Z., Sun, L., Wang, J., Chen, M., Xu, Z., Liao, Q., Zhou, L., Chen, X., Li, J., Zhou, K., Zhou, Y., Zeng, Y.-J., Han, S.-T., and Roy, V. A.L.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Advanced Science
Publisher:Wiley Open Access
ISSN (Online):2198-3844
Published Online:25 June 2018
Copyright Holders:Copyright © 2018 The Authors
First Published:First published in Advanced Science 5(9):1800714
Publisher Policy:Reproduced under a Creative Commons Licence
Related URLs:

University Staff: Request a correction | Enlighten Editors: Update this record