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Article Dans Une Revue Nature Communications Année : 2024

Photoinduced dynamics during electronic transfer from narrow to wide bandgap layers in one-dimensional heterostructured materials

Thomas Gauthier
Hiroo Suzuki
Satoshi Ohmura
Yuichiro Tanaka
Nicolas Godin
Gaël Privault
Shota Ono
Shinya Koshihara
Kenji Tsuruta
Yasuhiko Hayashi
Roman Bertoni
Masaki Hada

Résumé

Electron transfer is a fundamental energy conversion process widely present in synthetic, industrial, and natural systems. Understanding the electron transfer process is important to exploit the uniqueness of the low-dimensional van der Waals (vdW) heterostructures because interlayer electron transfer produces the function of this class of material. Here, we show the occurrence of an electron transfer process in one-dimensional layer-stacking of carbon nanotubes (CNTs) and boron nitride nanotubes (BNNTs). This observation makes use of femtosecond broadband optical spectroscopy, ultrafast time-resolved electron diffraction, and first-principles theoretical calculations. These results reveal that near-ultraviolet photoexcitation induces an electron transfer from the conduction bands of CNT to BNNT layers via electronic decay channels. This physical process subsequently generates radial phonons in the one-dimensional vdW heterostructure material. The gathered insights unveil the fundamentals physics of interfacial interactions in low dimensional vdW heterostructures and their photoinduced dynamics, pushing their limits for photoactive multifunctional applications.
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Dates et versions

hal-04599989 , version 1 (04-06-2024)

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Yuri Saida, Thomas Gauthier, Hiroo Suzuki, Satoshi Ohmura, Ryo Shikata, et al.. Photoinduced dynamics during electronic transfer from narrow to wide bandgap layers in one-dimensional heterostructured materials. Nature Communications, 2024, 15 (1), pp.4600. ⟨10.1038/s41467-024-48880-3⟩. ⟨hal-04599989⟩
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