2D perovskite nanosheets with thermally-stable high?κ response: A new platform for high-temperature capacitors

Yoon Hyun Kim, Hyung Jun Kim, Minoru Osada, Bao Wen Li, Yasuo Ebina, Takayoshi Sasaki

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

We investigated high-temperature dielectric responses of high-κ perovskite nanosheet (Ca2Nb3O10), an important material platform for postgraphene technology and ultrascale electronic devices. Through in situ characterizations using conducting atomic force microscopy, we found a robust high-temperature property of Ca2Nb3O10 nanosheet even in a monolayer form (∼2 nm). Furthermore, layer-by-layer assembled nanocapacitors retained both size-free high-εr characteristic (∼200) and high insulation resistance (∼1 × 10-7 A/cm2) at high temperatures up to 250 °C. The simultaneous improvement of εr and thermal stability in high-κ nanodielectrics is of critical technological importance, and perovskite nanosheet has great potential for a rational design and construction of high-temperature capacitors. (Figure Presented).

Original languageEnglish
Pages (from-to)19510-19514
Number of pages5
JournalACS Applied Materials and Interfaces
Volume6
Issue number22
DOIs
Publication statusPublished - 2014 Nov 26

Keywords

  • 2D perovskite nanosheet
  • High-temperature capacitor
  • In situ characterization
  • Nanodielectric
  • Thermal stability

ASJC Scopus subject areas

  • Materials Science(all)

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