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Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
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The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
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Related Experiment Video

Updated: Aug 23, 2025

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Efficient Hot Electron Capture in CuPc/MoSe2 Heterostructure Assisted by Intersystem Crossing.

Jianwei Ding1,2, Shaohua Fu3, Kui Hu1,2

  • 1CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, People's Republic of China.

Nano Letters
|October 27, 2022
PubMed
Summary

Researchers achieved over 78% hot electron transfer efficiency at an organic-inorganic interface using copper phthalocyanine (CuPc) and molybdenum diselenide (MoSe2). This breakthrough advances photovoltaic devices beyond theoretical limits.

Keywords:
electronic couplinghot electronintersystem crossingorganic−inorganic heterostructuretransient absorption spectroscopy

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Area of Science:

  • Materials Science
  • Photovoltaics
  • Organic Electronics

Background:

  • Efficient hot electron extraction is key for next-generation photovoltaics exceeding the Shockley-Queisser limit.
  • Experimental validation of hot electron harvesting at organic-inorganic interfaces remains limited.

Purpose of the Study:

  • To investigate hot electron dynamics at the copper phthalocyanine (CuPc)/molybdenum diselenide (MoSe2) interface.
  • To demonstrate efficient hot electron transfer and harvesting in an organic-inorganic hybrid system.

Main Methods:

  • Utilized steady-state spectroscopy and transient absorption spectroscopy.
  • Analyzed photogenerated hot electron transfer from MoSe2 to CuPc.

Main Results:

  • Achieved a hot electron transfer efficiency exceeding 78% from MoSe2 to CuPc.
  • Observed formation of singlet and triplet charge transfer states.
  • Demonstrated inhibition of back-donation and facilitated exciton dissociation into CuPc polarons with nanosecond lifetime.

Conclusions:

  • The CuPc/MoSe2 interface enables efficient hot electron extraction.
  • Rapid intersystem crossing of hybrid electronic states is a viable mechanism for hot electron harvesting.
  • This approach offers a promising route for developing advanced photovoltaic devices.