Synergistic engineering of the Stokes shift for highly efficient and stable quasi-2D perovskite luminescent solar concentrators

Three new quasi-2D perovskite/PVDF composite films with a high PLQY and large Stokes shift are obtained, PEA 2 MA x −1 Pb x Br 3 x +1 /PVDF ( x = 2, 3, 4) (PM x −1 PF). Among them, the LSC based on PM 2 PF exhibits a remarkable η ext of up to 4.9%.