Co jsem tak pogooglil, tak se to týká efektivity té BaTiO3 vrstvy:
By optimizing and employing the BaTiO3 modification layer, the power conversion efficiency of the cells was increased from 16.13 to 17.87%.
Na tom science.org se píše o upravení dané vrstvy:
Comparison with BaTiO3 of similar thickness shows the photocurrent in the superlattice is 10 times higher, despite a nearly two-thirds reduction in the volume of BaTiO3.
Takže to nebude o efektivitě celého článku nad 100%, nemyslim si, že ani nad 30 %, ale každé procento dobré