Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/144350
Title: Ultrafast charge transfer and recombination dynamics at the monolayer-multilayer WSe2 homojunction revealed by time-resolved photoemission electron microscopy
Authors: Xu, Ce
Barden, Natalie S.
He, Jinlu
Long, Run
Cadore, Alisson R.
Paradisanos, Ioannis
Ott, Anna K.
Soavi, Giancarlo
Tongay, Sefaattin
Cerullo, Giulio
Ferrari, Andrea C.
Prezhdo, Oleg V.
Loh, Zhi-Heng
Keywords: Science::Chemistry
Issue Date: 2020
Source: Ce, X., Barden, N. S., He, J., Long, R., Cadore, A. R., Paradisanos, I., Ott, A. K., ... Loh, Z.-H. (2020). Ultrafast charge transfer and recombination dynamics at the monolayer-multilayer WSe2 homojunction revealed by time-resolved photoemission electron microscopy. Proc. Of the 7th Asian Spectroscopy Conference (ASC 2020). doi:10.32655/ASC_8-10_Dec2020.67
Conference: Asian Spectroscopy Conference 2020
Abstract: Transition metal dichalcogenides (TMDs) have rapidly emerged as one of the most attractive families of two-dimensional materials due to their numerous outstanding electronic and optoelectronic properties. TMDs have layer-dependent band structures, exhibiting a dramatic transition from a direct bandgap in the monolayer (1L) to an indirect bandgap in the multilayer (NL). TMD homojunctions form when a 1L TMD interfaces with an NL TMD of the same chemical composition. Such 1L/NL TMD homojunctions are predicted to have similar properties as heterojunctions, which comprises two different TMDs. In this work, we employ time-resolved photoemission electron microscopy (TR-PEEM) to study the ultrafast carrier dynamics of a WSe2 1L/NL Type-I homojunction with high temporal (50 fs) and spatial (70 nm) resolution.
URI: https://hdl.handle.net/10356/144350
DOI: 10.32655/ASC_8-10_Dec2020.67
Research Centres: Institute of Advanced Studies 
Rights: © 2020 Nanyang Technological University.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:Asian Spectroscopy Conference

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