Article Observation of the photovoltaic effect in a van der Waals heterostructure

Shaochun Zhang ; Mina Maruyama ; Susumu Okada ; Mengsong Xue ; Kenji Watanabe SAMURAI ORCID (National Institute for Materials Science) ; Takashi Taniguchi SAMURAI ORCID (National Institute for Materials Science) ; Kazuki Hashimoto ; Yasumitsu Miyata ; Ruben Canton-Vitoria ; Ryo Kitaura SAMURAI ORCID (National Institute for Materials Science)

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Shaochun Zhang, Mina Maruyama, Susumu Okada, Mengsong Xue, Kenji Watanabe, Takashi Taniguchi, Kazuki Hashimoto, Yasumitsu Miyata, Ruben Canton-Vitoria, Ryo Kitaura. Observation of the photovoltaic effect in a van der Waals heterostructure. Nanoscale. 2023, 15 (12), 5948-5953.
SAMURAI

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(abstract)

Van der Waals (vdW) heterostructures, which can be assembled with various two-dimensional materials, provide a versatile platform for exploring emergent phenomena. Here we report an observation of the photovoltaic effect in a WS2/MoS2 vdW heterostructure. Light excitation of WS2/MoS2 at a wavelength of 633 nm yields photocurrent without applying bias voltages, and excitation power dependence of photocurrent shows characteristic crossover from liner to square root dependence. Photocurrent mapping has clearly shown that the observed photovoltaic effect arises from WS2/MoS2 region, not from Schottky junctions at electrode contacts. Kelvin probe microscope observations show no slope in electrostatic potential, excluding the possibility that the photocurrent originates from an unintentionally formed built-in potential.

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Keyword: Photovoltaic effect, WS2/MoS2, ight excitation

Date published: 2023-02-20

Publisher: Royal Society of Chemistry (RSC)

Journal:

  • Nanoscale (ISSN: 20403372) vol. 15 issue. 12 p. 5948-5953

Funding:

  • Japan Society for the Promotion of Science JP22H05458
  • Japan Society for the Promotion of Science JP21K18930
  • Japan Society for the Promotion of Science JP20H02566
  • Japan Society for the Promotion of Science JP20H05664
  • Japan Society for the Promotion of Science JP21H05232
  • Japan Society for the Promotion of Science JP21H05234
  • Japan Society for the Promotion of Science JP22H00283
  • Japan Society for the Promotion of Science 19H05790
  • Japan Society for the Promotion of Science 20H00354
  • Japan Society for the Promotion of Science 21H05233
  • Japan Science and Technology Agency JPMJCR16F3
  • Japan Science and Technology Agency JPMJCR19H4
  • Japan Science and Technology Agency JPMJFR213X
  • Japan Science and Technology Agency JPMJPR20A2

Manuscript type: Publisher's version (Version of record)

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First published URL: https://doi.org/10.1039/d2nr06616e

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Updated at: 2025-02-26 16:30:38 +0900

Published on MDR: 2025-02-26 16:30:38 +0900

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