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Xiangnan Sun1,2, Saül Vélez3, Ainhoa Atxabal3

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We developed a C60 fullerene molecular device combining photovoltaic effects and spin transport. This device shows a magnetic field-tunable photovoltaic response and potential for novel magnetic sensors.

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Area of Science:

  • Molecular spintronics
  • Organic photovoltaics
  • Nanoscale device fabrication

Background:

  • Integrating spin properties with photovoltaic devices is crucial for advanced electronic applications.
  • Fullerene derivatives offer unique electronic and spin transport characteristics.

Purpose of the Study:

  • To fabricate a molecular spin-photovoltaic device using C60 fullerenes.
  • To investigate the interplay between photovoltaic response and spin transport.
  • To explore potential applications in sensing and spintronic devices.

Main Methods:

  • Fabrication of a C60 fullerene-based molecular device.
  • Measurement of photovoltaic response under varying magnetic fields.
  • Analysis of spin-polarized current generation and transport.

Main Results:

  • The device exhibits a photovoltaic response tunable by magnetic fields, with magnetophotovoltage up to 5% at room temperature.
  • Demonstrated functionalities include a magnetic current inverter and diverging magnetocurrent.
  • Achieved completely spin-polarized currents by balancing injection and photogenerated carriers.

Conclusions:

  • The C60 fullerene-based device successfully integrates photovoltaic and spin transport functionalities.
  • The observed magnetophotovoltage and magnetocurrent effects open avenues for magnetic field sensing.
  • The device enables the creation of fully spin-polarized currents, relevant for spintronic applications.