Overview

• The triple-passivation approach uses rubidium chloride, DMOAI and PEACl to reduce crystal traps and stabilise ions in 1.75 eV perovskite films tuned for indoor light absorption.
• In laboratory ageing tests the treated cells retained 92% of their initial performance after more than 100 days and 76% after 300 hours under continuous 55 °C illumination.
• At 1 000 lux the devices converted 37.6% of indoor light into electricity, roughly six times the output of the best commercially available indoor solar cells.
• Based on accelerated durability results researchers estimate these cells could power low-draw electronics indoors for over five years without battery replacements.
• Following publication in Advanced Functional Materials the team is in talks with industry partners to scale up production and explore commercial deployment.