Efficient energy transfer in ultra-thin materials
#2D Material #Energy Transfer #Heterostructure
Efficient Energy Transfer in Ultra-Thin Materials. © 2016 American Chemical Society
Our research group is exploring the Fast Interlayer Energy Transfer in MoSe2/WS2 Heterostructures. We focus on excitons in two-dimensional (2D) semiconductors, which are expected to efficiently exchange energy across the van der Waals gap. Contrary to previous studies that found exciton decay dynamics dominated by interlayer charge transfer, our research reveals a fast interlayer energy transfer in MoSe2/WS2 heterostructures. This transfer, observed using photoluminescence excitation spectroscopy, is Förster-type and involves excitons in the WS2 layer resonantly exciting higher-order excitons in the MoSe2 layer. The estimated energy transfer time is among the fastest compared to other nanostructure hybrid systems. This efficient energy transfer opens up prospects for optical amplification and energy harvesting through intelligent layer engineering.
Evidence for Fast Interlayer Energy Transfer in MoSe2/WS2 Heterostructures.
Daichi Kozawa, Alexandra Carvalho, Ivan Verzhbitskiy, Francesco Giustiniano, Yuhei Miyauchi, Shinichiro Mouri, A. H. Castro Neto, Kazunari Matsuda, Goki Eda.
Nano Letters, 16, 4087-4093 (2016). 10.1021/acs.nanolett.6b00801