Overview
- NIMTE reported an all-perovskite tandem at 29.76% efficiency, with a certified 29.22%, by tuning colloidal precursors so both stacked subcells crystallize in step.
- The same approach kept more than 90% of output after 700 hours of maximum power tracking, and a 1 cm² device reached 28.87%, pointing to early scalability.
- UNIST improved the fragile contact between the transparent electrode and perovskite by deprotonating a 2PACz self-assembled layer, which strengthened bonding to indium tin oxide.
- That interface raised a perovskite/organic tandem to 25.1% efficiency with 2.23 volts and held over 80% of its starting output after 220 hours, then enabled bias-free water splitting at 7.7% solar-to-hydrogen.
- TUM with KIT and DESY traced large early losses in wide-bandgap perovskites to thermal cycling burn-in and showed bulky PDMA spacers can anchor the lattice to resist that damage.