Probing the interlayer coupling of twisted bilayer MoS2 using photoluminescence spectroscopy

Shengxi Huang; Xi Ling; Liangbo Liang; Jing Kong; Humberto Terrones; Vincent Meunier; Mildred S. Dresselhaus

doi:10.1021/nl5014597

Probing the interlayer coupling of twisted bilayer MoS₂ using photoluminescence spectroscopy

Shengxi Huang
, Xi Ling
, Liangbo Liang
, Jing Kong
, Humberto Terrones
, Vincent Meunier
, Mildred S. Dresselhaus

Research output: Contribution to journal › Article › peer-review

267 Scopus citations

Abstract

Two-dimensional molybdenum disulfide (MoS₂) is a promising material for optoelectronic devices due to its strong photoluminescence emission. In this work, the photoluminescence of twisted bilayer MoS₂ is investigated, revealing a tunability of the interlayer coupling of bilayer MoS₂. It is found that the photoluminescence intensity ratio of the trion and exciton reaches its maximum value for the twisted angle 0° or 60°, while for the twisted angle 30° or 90° the situation is the opposite. This is mainly attributed to the change of the trion binding energy. The first-principles density functional theory analysis further confirms the change of the interlayer coupling with the twisted angle, which interprets our experimental results.

Original language	English
Pages (from-to)	5500-5508
Number of pages	9
Journal	Nano Letters
Volume	14
Issue number	10
DOIs	https://doi.org/10.1021/nl5014597
State	Published - Oct 8 2014
Externally published	Yes

Keywords

Molybdenum disulfide
exciton
interlayer coupling
photoluminescence
trion
twisted bilayer

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10.1021/nl5014597

Cite this

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title = "Probing the interlayer coupling of twisted bilayer MoS2 using photoluminescence spectroscopy",

abstract = "Two-dimensional molybdenum disulfide (MoS2) is a promising material for optoelectronic devices due to its strong photoluminescence emission. In this work, the photoluminescence of twisted bilayer MoS2 is investigated, revealing a tunability of the interlayer coupling of bilayer MoS2. It is found that the photoluminescence intensity ratio of the trion and exciton reaches its maximum value for the twisted angle 0° or 60°, while for the twisted angle 30° or 90° the situation is the opposite. This is mainly attributed to the change of the trion binding energy. The first-principles density functional theory analysis further confirms the change of the interlayer coupling with the twisted angle, which interprets our experimental results.",

keywords = "Molybdenum disulfide, exciton, interlayer coupling, photoluminescence, trion, twisted bilayer",

author = "Shengxi Huang and Xi Ling and Liangbo Liang and Jing Kong and Humberto Terrones and Vincent Meunier and Dresselhaus, \{Mildred S.\}",

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doi = "10.1021/nl5014597",

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TY - JOUR

T1 - Probing the interlayer coupling of twisted bilayer MoS2 using photoluminescence spectroscopy

AU - Huang, Shengxi

AU - Ling, Xi

AU - Liang, Liangbo

AU - Kong, Jing

AU - Terrones, Humberto

AU - Meunier, Vincent

AU - Dresselhaus, Mildred S.

PY - 2014/10/8

Y1 - 2014/10/8

N2 - Two-dimensional molybdenum disulfide (MoS2) is a promising material for optoelectronic devices due to its strong photoluminescence emission. In this work, the photoluminescence of twisted bilayer MoS2 is investigated, revealing a tunability of the interlayer coupling of bilayer MoS2. It is found that the photoluminescence intensity ratio of the trion and exciton reaches its maximum value for the twisted angle 0° or 60°, while for the twisted angle 30° or 90° the situation is the opposite. This is mainly attributed to the change of the trion binding energy. The first-principles density functional theory analysis further confirms the change of the interlayer coupling with the twisted angle, which interprets our experimental results.

AB - Two-dimensional molybdenum disulfide (MoS2) is a promising material for optoelectronic devices due to its strong photoluminescence emission. In this work, the photoluminescence of twisted bilayer MoS2 is investigated, revealing a tunability of the interlayer coupling of bilayer MoS2. It is found that the photoluminescence intensity ratio of the trion and exciton reaches its maximum value for the twisted angle 0° or 60°, while for the twisted angle 30° or 90° the situation is the opposite. This is mainly attributed to the change of the trion binding energy. The first-principles density functional theory analysis further confirms the change of the interlayer coupling with the twisted angle, which interprets our experimental results.

KW - Molybdenum disulfide

KW - exciton

KW - interlayer coupling

KW - photoluminescence

KW - trion

KW - twisted bilayer

UR - https://www.scopus.com/pages/publications/84907863385

U2 - 10.1021/nl5014597

DO - 10.1021/nl5014597

M3 - Article

C2 - 25171263

AN - SCOPUS:84907863385

SN - 1530-6984

VL - 14

SP - 5500

EP - 5508

JO - Nano Letters

JF - Nano Letters

IS - 10

ER -

Probing the interlayer coupling of twisted bilayer MoS₂ using photoluminescence spectroscopy

Abstract

Keywords

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