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Low-temperature solution-processed p-type vanadium oxide for perovskite solar cells.

Haocheng Sun1, Xiaomeng Hou1, Qiulong Wei2

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A novel vanadium oxide (VOx) material enables efficient low-temperature fabrication of perovskite solar cells. This inorganic contact boosts power conversion efficiency to over 14% for planar heterojunction devices.

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Area of Science:

  • Materials Science
  • Renewable Energy
  • Photovoltaics

Background:

  • Perovskite solar cells offer promising photovoltaic performance.
  • Developing efficient and stable p-type contact materials is crucial for device optimization.
  • Low-temperature processing methods are desirable for scalable manufacturing.

Purpose of the Study:

  • To develop a low-temperature solution-processed inorganic p-type contact material for perovskite solar cells.
  • To investigate the performance of vanadium oxide (VOx) as a contact layer in planar heterojunction perovskite solar cells.
  • To optimize the deposition of perovskite films on VOx-coated substrates.

Main Methods:

  • Synthesis of vanadium oxide (VOx) as an inorganic p-type contact material.
  • Low-temperature solution processing of VOx layers.
  • Solvent-assisted deposition of uniform and compact perovskite (CH3NH3PbI3) films on VOx-coated substrates.
  • Fabrication and characterization of planar-heterojunction perovskite solar cells.

Main Results:

  • Successful development of a low-temperature solution-processed VOx material.
  • High-quality, uniform, and compact perovskite films deposited on VOx substrates.
  • Achieved a power conversion efficiency exceeding 14% for the fabricated solar cells.
  • Demonstrated high transmittance and efficient charge quenching properties of the VOx layers.

Conclusions:

  • Vanadium oxide (VOx) is a viable and effective inorganic p-type contact material for perovskite solar cells.
  • Low-temperature solution processing of VOx enables efficient fabrication of planar heterojunction devices.
  • The developed VOx contact material significantly enhances the performance of perovskite solar cells, achieving over 14% power conversion efficiency.