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  1. Home
  3. Quantifying Deep-level Defects-dominated Degradation For Commercially Viable Perovskite Solar Cells.
  1. Home
  3. Quantifying Deep-level Defects-dominated Degradation For Commercially Viable Perovskite Solar Cells.

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Quantifying Deep-Level Defects-Dominated Degradation for Commercially Viable Perovskite Solar Cells.

Qiu Xiong1,2, Can Wang1, Xiaofeng Huang2

  • 1State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, P. R. China.

Advanced Materials (Deerfield Beach, Fla.)
|June 12, 2026

View abstract on PubMed

Summary
This summary is machine-generated.

Deep-level defects (IFA and IPb) significantly degrade perovskite solar cells. A novel ligand coordination strategy effectively passivates these defects, enhancing device stability and commercial viability.

Keywords:
deep‐level defectdegradationlevelized cost of energyperovskite solar cells

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Area of Science:

  • Materials Science
  • Renewable Energy
  • Semiconductor Physics

Background:

  • Perovskite solar cells (PSCs) face stability challenges due to degradation mechanisms.
  • Dominant defect types causing PSC degradation remain unclear, hindering commercialization.
  • High operating costs associated with PSC instability limit widespread adoption.

Purpose of the Study:

  • Identify primary deep-level defects responsible for PSC degradation.
  • Develop a passivation strategy to enhance PSC stability and performance.
  • Improve the commercial viability of PSC technology.

Main Methods:

  • Quantitative analysis of capacitance-frequency spectra.
  • Application of detailed balance theory to identify defects.
  • Design and implementation of a non-intercalary ligand coordination strategy using 3TU2+ ions.
  • Evaluation of device performance and stability using ISOS-LC-1 protocol.

    • Main Results:

    • Identified deep-level IFA and IPb defects as primary degradation causes, despite lower concentrations than shallow defects.
    • Demonstrated effective passivation of deep-level defects using dual-end electropositive 3TU2+ ions.
    • Achieved a certified power conversion efficiency of 25.56% with an extrapolated T80 lifetime exceeding 10 years.
    • Reduced energy loss at the rear interface by an order of magnitude (1.46% to 0.62%).

    Conclusions:

    • Deep-level defects are critical for PSC degradation, necessitating targeted passivation strategies.
    • The 3TU2+ ligand coordination strategy significantly enhances PSC operational stability and longevity.
    • Achieved stability and efficiency metrics position PSCs as a commercially viable alternative to silicon photovoltaics, with a reduced levelized cost of energy (0.148$ kWh-1).