An entropy-regulating molecular lock stabilizes formamidinium lead halide perovskite - PubMed
3 days ago
- #perovskite solar cells
- #entropy regulation
- #phase stability
- An entropy-regulating molecular lock using 3-PMPCl stabilizes the α-phase of formamidinium lead iodide perovskite by modulating cation rotation and suppressing entropy increase from octahedral disorder.
- This strategy increases the phase transition energy barrier, enabling stabilization under high temperature and humidity, leading to a certified 27.6% power conversion efficiency.
- Operational stability is enhanced with a bismuth electrode, retaining 93.0% of initial efficiency (26.8%) after 1011 hours at 85°C under illumination.