Open AccessHigh-efficiency energy transfer in perovskite heterostructures
Author(s) -
Yiling Song,
Cong Zhang,
Weiwei Liu,
Xiaohong Li,
Hua Long,
Kai Wang,
Bing Wang,
Peixiang Lu
Publication year - 2018
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.018448
Subject(s) - photoluminescence , perovskite (structure) , heterojunction , excitation , ultrashort pulse , förster resonance energy transfer , optics , materials science , radiative transfer , optoelectronics , energy transfer , wavelength , photon , physics , laser , chemistry , molecular physics , fluorescence , crystallography , quantum mechanics
Here, we report the energy transfer in (PEA) 2 PbI 4 /MAPbBr 3 perovskite heterostructures. Under two-photon excitation, the photoluminescence (PL) emission of the (PEA) 2 PbI 4 flake is nearly completely quenched, while that of the MAPbBr 3 microplate is greatly increased (6.5 folds higher) in the heterostructure. The opposite variation character of the PL emissions is attributed to the radiative energy transfer from the (PEA) 2 PbI 4 flake to the MAPbBr 3 microplate. The radiative energy transfer occurs on an ultrafast timescale with a high efficiency (~100%). In addition, a strongly thickness- and wavelength-dependent interlayer interaction is observed under one-photon excitation. This work advocates great promise for revealing the interlayer interaction of perovskite heterostructures and developing high-performance optoelectronic devices.