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Interlayer Trions in 2D Transition-Metal Dichalcogenide Heterostructures

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Title
Interlayer Trions in 2D Transition-Metal Dichalcogenide Heterostructures
Author(s)
Biswas Chandan; Riya Sebait
Subject
2D nanomaterial, ; Exciton, ; Interlayer trion, ; Photoluminescence, ; transition-metal dichalcogenides
Publication Date
2020-11
Journal
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.77, no.10, pp.850 - 852
Publisher
KOREAN PHYSICAL SOC
Abstract
© 2020, The Korean Physical Society. A dimensionally confined dielectric constant and reduced dielectric screening lead to two-dimensional transition-metal dichalcogenides (TMDs). The confined dielectric constant triggers a strong Coulomb interaction and high exciton binding energies between TMD heterostructures. Here we show a highly efficient interlayer charged exciton or trion formation and its generation sites are present in materials at room temperature. Two different transition metals (Mo, W) and chalcogenide (S, Se) elements were investigated in two different heterostructure combinations (MoS2—WS2 and MoSe2—WS2). Room temperature photoluminescence measurements demonstrate a highly efficient trion formation between and close to the heterostructure interfaces. This study highlights an effective band alignment, strong photoexciting Coulomb interaction, and formation of interlayer trions with different recombination energies. This investigation suggests the possibility of utilizing interlayer trions in promising optoelectronic devices in the future
URI
https://pr.ibs.re.kr/handle/8788114/8444
DOI
10.3938/jkps.77.850
ISSN
0374-4884
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > 1. Journal Papers (저널논문)
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