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Interfacial Sulfur Functionalization Anchoring SnO

Zhen Wang1, Muhammad Akmal Kamarudin1, Ng Chi Huey1

  • 1Faculty of Life Science and Systems Engineering, Kyushu Institute of Technology, 2-4 Hibikino, Wakamatsu-ku, Kitakyushu, Fukuoka, 808-0196, Japan.

Chemsuschem
|September 19, 2018
PubMed
Summary
This summary is machine-generated.

Sulfur functionalization of tin oxide (SnO2) surfaces passivates charge traps in perovskite solar cells. This method enhances power conversion efficiency and improves device stability, even under humid conditions.

Keywords:
interfacial engineeringperovskitessolar cellssulfurtrap passivation

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Area of Science:

  • Materials Science
  • Renewable Energy
  • Photovoltaics

Background:

  • Trap states in perovskite materials degrade solar cell performance and stability.
  • Interfacial recombination is a key factor limiting device efficiency.

Purpose of the Study:

  • To develop a facile strategy for passivating charge traps and reducing recombination at the perovskite/SnO2 interface.
  • To improve the efficiency and long-term stability of perovskite solar cells.

Main Methods:

  • Sulfur functionalization of SnO2 surfaces using xanthate decomposition at low temperatures.
  • Fabrication of methylammonium lead iodide (MAPbI3) perovskite solar cells.
  • Characterization using current-voltage measurements and thermally stimulated current (TSC) analysis.

Main Results:

  • Achieved a power conversion efficiency increase from 16.56% to 18.41% for perovskite solar cells.
  • Demonstrated suppressed hysteresis and accelerated interfacial charge transport.
  • Observed a significant decrease in trap density in the perovskite bulk.
  • Showcased enhanced device stability with only 10% degradation after 70 days of air storage without encapsulation.

Conclusions:

  • Facile sulfur functionalization of SnO2 surfaces effectively passivates traps and mitigates recombination.
  • This strategy leads to highly efficient and stable perovskite solar cells.
  • The method offers a promising route for advancing perovskite photovoltaic technology.