Toshiba has developed a 15.1%-efficient perovskite cell. Crucially, it’s 703 cm2, not one of the centimeter-scale test cells whose efficiency ratings don’t yet pan out at larger sizes. Another Japanese conglomerate, Panasonic, announced a 16.09% perovskite cell of 802 cm2 back in February 2020, so Toshiba is pointing out that its cell is a record specifically for polymer-based perovskites – but any breakthrough at this scale is noteworthy. This time Toshiba’s researchers reduced the deposition process to just one coating, applied 25 times faster than their previous approach, and applying MAPbI3 ink directly instead of a multi-step process which had been unreliably forming the compound in situ. Toshiba states that coating speed has reached 6 meters per minute, a rate…