Nonradiative Energy Transfer and Selective Charge Transfer in a WS2/(PEA)2PbI4Heterostructure

Miriam Karpińska, Minpeng Liang, Roman Kempt, Kati Finzel, Machteld Kamminga, Mateusz Dyksik, Nan Zhang, Catherine Knodlseder, Duncan K. Maude, Michał Baranowski, Kłopotowski, Jianting Ye, Agnieszka Kuc, Paulina Plochocka*

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

3 Citaten (Scopus)
78 Downloads (Pure)

Samenvatting

van der Waals heterostructures are currently the focus of intense investigation; this is essentially due to the unprecedented flexibility offered by the total relaxation of lattice matching requirements and their new and exotic properties compared to the individual layers. Here, we investigate the hybrid transition-metal dichalcogenide/2D perovskite heterostructure WS2/(PEA)2PbI4 (where PEA stands for phenylethylammonium). We present the first density functional theory (DFT) calculations of a heterostructure ensemble, which reveal a novel band alignment, where direct electron transfer is blocked by the organic spacer of the 2D perovskite. In contrast, the valence band forms a cascade from WS2 through the PEA to the PbI4 layer allowing hole transfer. These predictions are supported by optical spectroscopy studies, which provide compelling evidence for both charge transfer and nonradiative transfer of the excitation (energy transfer) between the layers. Our results show that TMD/2D perovskite (where TMD stands for transition-metal dichalcogenides) heterostructures provide a flexible and convenient way to engineer the band alignment.

Originele taal-2English
Pagina's (van-tot)33677-33684
Aantal pagina's8
TijdschriftACS Applied Materials and Interfaces
Volume13
Nummer van het tijdschrift28
Vroegere onlinedatum6-jul-2021
DOI's
StatusPublished - 21-jul-2021

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