Cooperative phase–interface modulation enabling ultralow voltage loss in bromide-containing perovskite solar cells with isopropanol as an antisolvent

Cooperative phase–interface modulation employing isopropanol antisolvent enables Br-containing perovskite solar cells to achieve 1.24 V V OC and 24.33% PCE, with an ultralow 0.38 V voltage loss, advancing eco-friendly high-performance photovoltaics.