Black Phosphorus Based Multicolor Light-Modulated Transparent Memristor with Enhanced Resistive Switching Performance

Area of Science:

• Materials Science
• Nanotechnology
• Electronics

Background:

• Transparent memristors are multifunctional devices combining photoresponse and data storage.
• Black phosphorus (BP) is an emerging two-dimensional (2D) material with excellent optical and electronic properties.

Purpose of the Study:

• To design and investigate a multicolor light-modulated transparent memristor utilizing black phosphorus (BP).
• To explore the resistive switching (RS) mechanism and performance enhancement under light illumination.

Main Methods:

• Fabrication of a transparent memristor with a black phosphorus nanosheets (BP@PS NSs) resistive switching layer between ITO electrodes.
• Characterization of the memristor's transmittance, resistive switching characteristics, and photoresponse under various light wavelengths.
• Analysis of the resistive switching mechanism using an energy band model.

Main Results:

• The fabricated ITO/BP@PS/ITO memristor exhibited >75% transmittance from 350 to 1100 nm.
• The device showed excellent RS characteristics, including no initial preforming, low operating voltage, and long retention time.
• Light illumination (380-785 nm) enhanced ON/OFF ratios by over 10 times, reduced resetting voltages, and decreased power consumption due to elevated Schottky barrier height.

Conclusions:

• Black phosphorus (BP) is a promising material for light-modulated memristors.
• The novel device configuration offers insights into developing multifunctional microelectronic devices based on 2D materials.