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Scientific article
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Lithium-ion conducting glass ceramics for electrostatic gating

Published inApplied Physics Letters, vol. 113, no. 3, 033502
Publication date2018
Abstract

We explore solid electrolytes for electrostatic gating using field-effect transistors (FETs) in which thin WSe2 crystals are exfoliated and transferred onto a lithium-ion conducting glass ceramic substrate. For negative gate voltages (VG < 0), the devices work equally well as ionic liquid gated FETs while offering specific advantages, whereas no transistor action is seen for VG > 0. For VG < 0, the devices can nevertheless be driven into the ambipolar injection regime by applying a large source-drain bias and strong electroluminescence is observed when direct band-gap WSe2 monolayers are used. Detecting and imaging the emitted light is much simpler in these FETs as compared to ionic liquid gated transistors, because the semiconductor surface is exposed (i.e., not covered by another material). Our results show that solid electrolytes are complementary to the existing liquid gates, as they enable experiments that are not possible when the semiconductor is buried under the liquid itself.

Keywords
  • Field Effect Transistor
  • Ionic Liquid Gating
  • Electroluminescence
  • Transition Metal Dichalcogenides
Research group
Funding
  • Swiss National Science Foundation - Ambizione
  • Autre - EU graphene Flagship
Citation (ISO format)
PHILIPPI, Marc et al. Lithium-ion conducting glass ceramics for electrostatic gating. In: Applied Physics Letters, 2018, vol. 113, n° 3, p. 033502. doi: 10.1063/1.5038407
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Article (Accepted version)
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Identifiers
ISSN of the journal0003-6951
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Technical informations

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