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Solution processed bismuth oxyiodide (BiOI) thin films and solar cells.

Thomas Feeney1, Gabriel Aygur1, Tony Nguyen1

  • 1School of Science, RMIT University, Melbourne, Australia.

Nanotechnology
|May 12, 2023
PubMed
Summary

Solution-processed bismuth oxyiodide (BiOI) thin films enable efficient, stable, and low-toxicity solar cells. This advancement rivals vacuum-deposited devices, paving the way for next-generation optoelectronics.

Keywords:
chalcohalideoptoelectronicoxyhalideperovskite-inspiredphotovoltaic

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Area of Science:

  • Materials Science
  • Solid-State Chemistry
  • Optoelectronics

Background:

  • Post-transition metal chalcohalides are promising semiconductors for optoelectronics.
  • Bismuth oxyiodide (BiOI) offers environmental stability, low toxicity, and defect tolerance.
  • The 'ns²' electronic configuration contributes to BiOI's desirable material properties.

Purpose of the Study:

  • To develop solution-processed bismuth oxyiodide (BiOI) thin films.
  • To fabricate the first all-inorganic solar cells using solution-processed BiOI.
  • To enhance solar cell performance through templated BiOI film growth.

Main Methods:

  • Fabrication of BiOI thin films via a solution-processed method.
  • Construction of all-inorganic solar cells with an ITO/NiO/BiOI/ZnO/Al architecture.
  • Templating BiOI thin film growth to optimize device performance.

Main Results:

  • Achieved pin-hole free, highly pure BiOI films without contaminants.
  • Successfully fabricated solution-processed all-inorganic solar cells based on BiOI.
  • Templated BiOI films led to efficiencies comparable to vacuum-deposited devices.

Conclusions:

  • Solution-processed BiOI thin films are a viable alternative to vacuum-deposited materials.
  • These BiOI films and devices represent a significant advancement for optoelectronics.
  • This work provides a platform for developing future bismuth chalcohalide-based optoelectronic devices.