Overview
- IMDEA Nanoscience reports a spiro‑phenothiazine hole‑transport material (PTZ‑Fl) enabling 25.8% lab efficiency and 25.2% National Renewable Energy Laboratory–certified performance.
- The group fabricated a 25 cm2 perovskite mini‑module that achieved 22.1% efficiency, addressing the typical drop seen when scaling from cells to modules.
- Devices retained about 80% performance after more than 1,000 hours under standard test conditions and endured over 1,100 hours of illumination without measurable degradation.
- Under ISOS‑D‑1 stress testing, the PTZ‑Fl devices preserved 95% of initial efficiency after 3,600 hours, indicating improved short‑term durability.
- The Advanced Materials paper appears alongside wider efforts to extend lifetimes and scale manufacturing, including new Park–Saliba collaboration work and fresh studies mapping thermal‑driven degradation in wide‑bandgap perovskites.