Direct Charge Trapping Multilevel Memory with Graphdiyne/MoS Van Der Waals Heterostructure

Overview

Journal Adv Sci (Weinh)

Specialty Biomedical Engineering

Date 2021 Sep 9

PMID 34499424

Citations 9

Authors

Jialing Wen

Wenhui Tang

Zhuo Kang

Qingliang Liao

Mengyu Hong

Junli Du

Xiankun Zhang

Huihui Yu

Haonan Si

Zheng Zhang

Yue Zhang

Affiliations

Soon will be listed here.

Abstract

Direct charge trapping memory, a new concept memory without any dielectric, has begun to attract attention. However, such memory is still at the incipient stage, of which the charge-trapping capability depends on localized electronic states that originated from the limited surface functional groups. To further advance such memory, a material with rich hybrid states is highly desired. Here, a van der Waals heterostructure design is proposed utilizing the 2D graphdiyne (GDY) which possesses abundant hybrid states with different chemical groups. In order to form the desirable van der Waals coupling, the plasma etching method is used to rapidly achieve the ultrathin 2D GDY with smooth surface for the first time. With the plasma-treated 2D GDY as charge-trapping layer, a direct charge-trapping memory based on GDY/MoS is constructed. This bilayer memory is featured with large memory window (90 V) and high degree of modulation (on/off ratio around 8 × 10 ). Two operating mode can be achieved and data storage capability of 9 and 10 current levels can be obtained, respectively, in electronic and opto-electronic mode. This GDY/MoS memory introduces a novel application of GDY as rich states charge-trapping center and offers a new strategy of realizing high performance dielectric-free electronics, such as optical memories and artificial synaptic.

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