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Published on: March 19, 2017
Precise Iodide-Trap Strategy for Photothermally Stable Spiro-OMeTAD-Based Perovskite Solar Cells
Zeyang Deng1, Yikun Liu1, Hongbo Zhou1
1College of Chemistry and Chemical Engineering/Film Energy Chemistry for Jiangxi Provincial Key Laboratory (FEC)/Institute of Polymers and Energy Chemistry, Nanchang University, Nanchang, China.
Angewandte Chemie (International Ed. in English)
|July 24, 2026
Summary
This study introduces a dual iodide-trap strategy to enhance the photothermal stability of perovskite solar cells (PVSCs). The new method effectively traps mobile iodide ions, improving device efficiency and longevity.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Photothermal stress causes iodide ion migration in perovskite solar cells (PVSCs) using spiro-OMeTAD.
- This migration degrades interfacial contact and spiro-OMeTAD doping, limiting device stability.
Purpose of the Study:
- To develop a dual iodide-trap strategy for enhancing the photothermal stability of PVSCs.
- To maintain high hole transport capacity and interfacial integrity under photothermal stress.
Main Methods:
- Devised 2,3,5,6-tetrafluoro-4-iodobenzamide (TFIBA) to create iodide ion traps via halogen bonding.
- Utilized (bis(trifluoroacetoxy)iodo)pentafluorobenzene (FPIFA) as a dopant for efficient p-doping and additional iodide trapping.
Main Results:
- The dual iodide-trap strategy successfully immobilized mobile iodide ions.
- Achieved a power conversion efficiency of 26.81% with a T93 lifetime exceeding 1140 hours at 85°C under illumination.
- Demonstrated significantly improved photothermal stability in spiro-OMeTAD-based PVSCs.
Conclusions:
- The dual iodide-trap strategy offers a viable route for creating efficient and photothermally stable perovskite solar cells.
- This approach addresses key challenges in PVSC commercialization by enhancing operational longevity.
