Highly Reliable Electrochemical Metallization Threshold Switch Through Conductive Filament Engineering Using Two-Dimensional PtSe2 Insertion Layer

Min Su Kim, Euyjin Park, Seung Geun Kim, Jae Hyeun Park, Seung Hwan Kim, Kyu Hyun Han, Hyun Yong Yu

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Electrochemical metallization threshold switch (ECM TS) has received significant attention for various applications owing to its high ON/OFF ratio, fast switching characteristics, and simple active electrode/dielectric layer/inert electrode structures. However, the excess diffusion of active metal ions causes severe variation in threshold voltage and poor endurance. Furthermore, the small room for inert electrode metal is a problem to be solved for various applications of ECM TS. Here, a novel structure is proposed in which a two-dimensional platinum diselenide (PtSe2) is inserted between the dielectric layer and inert electrode to engineer the conductive filament by controlling the active metal ion concentration. The low work function, superior inertness, layered structure, and smooth surface of PtSe2 insertion layer lead to thin and weak conductive filament with few active metal atoms and allow the use of various metals as inert electrode. Consequently, PtSe2-inserted ECM TS shows high reliability in both threshold voltage distribution (σ/µ = ≈6.58%) and endurance (>106 cycles). Furthermore, PtSe2-inserted ECM TS-based 2 × 2 cross-bar array is proposed as AND and OR logic circuits. This study is expected to pave the way for the development of ECM TS for next-generation electronic applications.

Original languageEnglish
Article number2202296
JournalAdvanced Materials Interfaces
Volume10
Issue number7
DOIs
Publication statusPublished - 2023 Mar 6

Bibliographical note

Publisher Copyright:
© 2023 The Authors. Advanced Materials Interfaces published by Wiley-VCH GmbH.

Keywords

  • conductive filament
  • electrochemical metallization threshold switch
  • insertion layer
  • platinum diselenide
  • two-dimensional material

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering

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