Abstract

The luminescence feature of perovskite NPs with high PLQY directs them to lighting and display applications. 2D A2MAn−1PbnBr3n+1 (n=1−6) perovskites with A as octylammonium and benzylammonium cations are synthesized by the LARP method, in which the highest PL emission is attained to the n=6 sample with benzylamine cation. XRD results reveal the appearance of diffraction peaks related to 3D perovskites with increasing n value. Mixing 3D perovskites with 2D ones leads to the formation of core-shell MAPbBr3−A2MAn−1PbnBr3n+1 (n=1−6) nanostructures, confirmed by TEM images and optical properties. Incorporation of Zn to core-shell perovskites improves the PL intensity and induces higher crystallinity. A blue shift in absorption and emission spectra of Zn-doped perovskites is observed. The highest PLQY (94%) is attributed to the Zn-doped core-shell perovskite with n=6 among the all-synthesized samples. Luminescent solar concentrators with thicknesses of 2 mm and 5 mm are fabricated with benzylamine-based perovskites, because of their greater PLQY versus octylamine-based perovskites. The performance of LSC devices is boosted for the LSC with 5 mm thickness. The relative PCE obtained for the core-shell perovskite-based LSC with thickness of 5 mm reaches to almost 60%.

Full Text
Published version (Free)

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call