There’s always another perovskite startup to cover – this week it’s Sekisui Chemical, a chemicals giant now taking an interest in perovskites, which has caught our eye by signing a Memorandum of Understanding with Slovakia concerning a pilot module factory, proposed to have a $68 million investment cost, to be built in that country. Sekisui Chemical is Japanese, and like the overwhelming majority of East Asian perovskite companies, is pursuing thin-film single-junction perovskite. And like many single-junction thin-film companies, its production method is roll-to-roll. The company claims a 15%-efficient module on a 30cm wide roll-to-roll process (presumably 900cm2), combined with 10-year outdoor durability – all solid compared to its rivals. That’s a much lower output per m2 than silicon PV,…