Demonstrator devices for artificial photosynthesis: general discussion. (24th June 2019) - Abe, Ryu; Aitchison, Catherine M.; Andrei, Virgil; Beller, Matthias; Cheung, Daniel; Creissen, Charles E.; de la Peña O'Shea, Víctor A.; Durrant, James R.; Grätzel, Michael; Hammarström, Leif; Haussener, Sophia; In, Su-Il; et al.