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PreprintarXiv licencearXiv

Optical Signature of Bias-Induced Carrier Injection in a WSe2/MoS2 Heterostructure Diode

  • Yasuyuki Hirata
  • Hibiki Kinpara
  • Shinya Ohno
  • Yoshihiro Miyauchi
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Abstract

We investigate the bias-dependent photoluminescence (PL) response of a WSe2/MoS2 heterostructure diode. Under forward bias, trion-related emission in WSe2 is markedly enhanced, whereas reverse bias produces minimal spectral changes. This asymmetric response cannot be explained by electric-field effects alone and instead reflects carrier injection at the functional interface. These results demonstrate that PL provides a direct optical probe of carrier injection in an operating van der Waals heterostructure. More broadly, this approach establishes spatially resolved PL spectroscopy as a versatile tool for pinpointing the interfaces governing device operation in van der Waals heterostructures.

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Cite

BibTeXRIS
BibTeX
@misc{hirata2026optical,
  title = {{Optical Signature of Bias-Induced Carrier Injection in a WSe2/MoS2 Heterostructure Diode}},
  author = {Yasuyuki Hirata and Hibiki Kinpara and Shinya Ohno and Yoshihiro Miyauchi},
  howpublished = {arXiv},
  year = {2026},
  month = nov,
  doi = {10.48550/arxiv.2611.00147},
  eprint = {2611.00147},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2611.00147},
}
RIS
TY  - UNPB
TI  - Optical Signature of Bias-Induced Carrier Injection in a WSe2/MoS2 Heterostructure Diode
AU  - Yasuyuki Hirata
AU  - Hibiki Kinpara
AU  - Shinya Ohno
AU  - Yoshihiro Miyauchi
PY  - 2026
DA  - 2026/11/01
PB  - arXiv
DO  - 10.48550/arxiv.2611.00147
UR  - https://arxiv.org/abs/2611.00147
AB  - We investigate the bias-dependent photoluminescence (PL) response of a WSe_2/MoS_2 heterostructure diode. Under forward bias, trion-related emission in WSe_2 is markedly enhanced, whereas reverse bias produces minimal spectral changes. This asymmetric response cannot be explained by electric-field effects alone and instead reflects carrier injection at the functional interface. These results demonstrate that PL provides a direct optical probe of carrier injection in an operating van der Waals heterostructure. More broadly, this approach establishes spatially resolved PL spectroscopy as a versatile tool for pinpointing the interfaces governing device operation in van der Waals heterostructures.
ER  -