Redox Gating for Colossal Carrier Modulation and Unique Phase Control

Le Zhang, Changjiang Liu, Hui Cao, Andrew J. Erwin, Dillon D. Fong, Anand Bhattacharya, Luping Yu, Liliana Stan, Chongwen Zou, Matthew V. Tirrell, Hua Zhou, Wei Chen

Research output: Contribution to journalArticlepeer-review

Abstract

Redox gating, a novel approach distinct from conventional electrolyte gating, combines reversible redox functionalities with common ionic electrolyte moieties to engineer charge transport, enabling power-efficient electronic phase control. This study achieves a colossal sheet carrier density modulation beyond 1016 cm−2, sustainable over thousands of cycles, all within the sub-volt regime for functional oxide thin films. The key advantage of this method lies in the controlled injection of a large quantity of carriers from the electrolyte into the channel material without the deleterious effects associated with traditional electrolyte gating processes such as the production of ionic defects or intercalated species. The redox gating approach offers a simple and practical means of decoupling electrical and structural phase transitions, enabling the isostructural metal-insulator transition and improved device endurance. The versatility of redox gating extends across multiple materials, irrespective of their crystallinity, crystallographic orientation, or carrier type (n- or p-type). This inclusivity encompasses functional heterostructures and low-dimensional quantum materials composed of sustainable elements, highlighting the broad applicability and potential of the technique in electronic devices.

Original languageEnglish (US)
Article number2308871
JournalAdvanced Materials
Volume36
Issue number16
DOIs
StatePublished - Apr 18 2024
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2024 Argonne National Laboratory. Advanced Materials published by Wiley-VCH GmbH.

Keywords

  • carrier modulation
  • electron injection
  • metal-insulator transition
  • phase control
  • redox gating
  • transistor

PubMed: MeSH publication types

  • Journal Article

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