Related Experiment Video
Updated: Jun 13, 2026
09:19
In Situ Monitoring of the Accelerated Performance Degradation of Solar Cells and Modules: A Case Study for Cu(In,Ga)Se2 Solar Cells
Published on: October 3, 2018
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
Summary
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.
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).
