Phototunable Biomemory Based on Light-Mediated Charge Trap

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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  • Ziyu Lv
  • Yan Wang
  • Zhonghui Chen
  • Long Sun
  • Junjie Wang
  • Meng Chen
  • Zhenting Xu
  • Qiufan Liao
  • Li Zhou
  • Xiaoli Chen
  • Jieni Li
  • Kui Zhou
  • Ye Zhou
  • Yu-Jia Zeng
  • Su-Ting Han


Original languageEnglish
Article number1800714
Journal / PublicationAdvanced Science
Issue number9
Online published25 Jun 2018
Publication statusPublished - Sep 2018



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.

Research Area(s)

  • carbon dots, charge trapping, Kelvin probe force microscopy, resistive switching, silk

Citation Format(s)

Phototunable Biomemory Based on Light-Mediated Charge Trap. / Lv, Ziyu; Wang, Yan; Chen, Zhonghui et al.

In: Advanced Science, Vol. 5, No. 9, 1800714, 09.2018.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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