Nonradiative Energy Transfer between Thickness-Controlled Halide Perovskite Nanoplatelets.

ABSTRACT: Despite showing great promise for optoelectronics, the commercialization of halide perovskite nanostructure-based devices is hampered by inefficient electrical excitation and strong exciton binding energies. While transport of excitons in an energy-tailored system via Förster resonance energy transfer (FRET) could be an efficient alternative, halide ion migration makes the realization of cascaded structures difficult. Here, we show how these could be obtained by exploiting the pronounced quantum confinement effect in two-dimensional CsPbBr3-based nanoplatelets (NPls). In thin films of NPls of two predetermined thicknesses, we observe an enhanced acceptor photoluminescence (PL) emission and a decreased donor PL lifetime. This indicates a FRET-mediated process, benefitted by the structural p

SUBMITTER: Singldinger A 

PROVIDER: S-EPMC7216487 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature