Enhanced Trion Emission in Monolayer MoSe2 by Constructing a Type-I Van Der Waals Heterostructure

Juanmei Duan; Phanish Chava; Mahdi Ghorbani-Asl; Denise Erb; Liang Hu; Arkady V. Krasheninnikov; Harald Schneider; Lars Rebohle; Artur Erbe; Manfred Helm; Yu Jia Zeng; Shengqiang Zhou; Slawomir Prucnal

doi:10.1002/adfm.202104960

Enhanced Trion Emission in Monolayer MoSe₂ by Constructing a Type-I Van Der Waals Heterostructure

Juanmei Duan^*
, Phanish Chava
, Mahdi Ghorbani-Asl
, Denise Erb
, Liang Hu
, Arkady V. Krasheninnikov
, Harald Schneider
, Lars Rebohle
, Artur Erbe
, Manfred Helm
, Yu Jia Zeng
, Shengqiang Zhou
, Slawomir Prucnal

^*Corresponding author for this work

Department of Applied Physics

Helmholtz-Zentrum Dresden-Rossendorf
Technische Universität Dresden
Hangzhou Dianzi University
Shenzhen University

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

36 Citations (Web of Science)

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Abstract

Trions, quasi-particles consisting of two electrons combined with one hole or of two holes with one electron, have recently been observed in transition metal dichalcogenides (TMDCs) and drawn increasing attention due to potential applications of these materials in light-emitting diodes, valleytronic devices as well as for being a testbed for understanding many-body phenomena. Therefore, it is important to enhance the trion emission and its stability. In this study, a MoSe₂/FePS₃ van der Waals heterostructure (vdWH) with type-I band alignment is constructed, which allows for carriers injection from FePS₃ to MoSe₂. At low temperatures, the neutral exciton (X⁰) emission in this vdWH is almost completely suppressed. The I_Trion/I_x0 intensity ratio increases from 0.44 in a single MoSe₂ monolayer to 20 in this heterostructure with the trion charging state changing from negative in the monolayer to positive in the heterostructure. The optical pumping with circularly polarized light shows a 14% polarization for the trion emission in MoSe₂/FePS₃. Moreover, forming such type-I vdWH also gives rise to a 20-fold enhancement of the room temperature photoluminescence from monolayer MoSe₂. These results demonstrate a novel approach to convert excitons to trions in monolayer 2D TMDCs via interlayer doping effect using type-I band alignment in vdWH.

Original language	English
Article number	2104960
Number of pages	8
Journal	Advanced Functional Materials
Volume	31
Issue number	40
Early online date	2021
DOIs	https://doi.org/10.1002/adfm.202104960
Publication status	Published - Oct 2021
MoE publication type	A1 Journal article-refereed

Funding

J.M.D. thanks China Scholarship Council (File no. 201706890037). L.H. thanks the National Natural Science Foundation of China (project number 61804098) and the Zhejiang Provincial Natural Science Foundation of China (project number LZ21E020002). Y.J.Z. thanks the Shenzhen Science and Technology Project under Grant no. JCYJ20180507182246321. A.V.K. also thanks the DFG for support within the projects KR 4866/2‐1 (project number 339 406129719). The computational support from the Technical University of Dresden computing cluster (TAURUS) and from High Performance Computing Center (HLRS) in Stuttgart, Germany is gratefully appreciated. The authors thank Scheumann for the metal deposition of the substrates. The nanofabrication facilities (NanoFaRo) at the Ion Beam Center at the HZDR are also gratefully acknowledged.

Keywords

photoluminescence enhancement
polarization
trion/exciton intensity ratio
type I
van der Waals heterosturcture

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Cite this

@article{75545258c4ce4afabccb3ac7aec8106e,

title = "Enhanced Trion Emission in Monolayer MoSe2 by Constructing a Type-I Van Der Waals Heterostructure",

abstract = "Trions, quasi-particles consisting of two electrons combined with one hole or of two holes with one electron, have recently been observed in transition metal dichalcogenides (TMDCs) and drawn increasing attention due to potential applications of these materials in light-emitting diodes, valleytronic devices as well as for being a testbed for understanding many-body phenomena. Therefore, it is important to enhance the trion emission and its stability. In this study, a MoSe2/FePS3 van der Waals heterostructure (vdWH) with type-I band alignment is constructed, which allows for carriers injection from FePS3 to MoSe2. At low temperatures, the neutral exciton (X0) emission in this vdWH is almost completely suppressed. The ITrion/Ix0 intensity ratio increases from 0.44 in a single MoSe2 monolayer to 20 in this heterostructure with the trion charging state changing from negative in the monolayer to positive in the heterostructure. The optical pumping with circularly polarized light shows a 14\% polarization for the trion emission in MoSe2/FePS3. Moreover, forming such type-I vdWH also gives rise to a 20-fold enhancement of the room temperature photoluminescence from monolayer MoSe2. These results demonstrate a novel approach to convert excitons to trions in monolayer 2D TMDCs via interlayer doping effect using type-I band alignment in vdWH.",

keywords = "photoluminescence enhancement, polarization, trion/exciton intensity ratio, type I, van der Waals heterosturcture",

author = "Juanmei Duan and Phanish Chava and Mahdi Ghorbani-Asl and Denise Erb and Liang Hu and Krasheninnikov, \{Arkady V.\} and Harald Schneider and Lars Rebohle and Artur Erbe and Manfred Helm and Zeng, \{Yu Jia\} and Shengqiang Zhou and Slawomir Prucnal",

note = "Funding Information: J.M.D. thanks China Scholarship Council (File no. 201706890037). L.H. thanks the National Natural Science Foundation of China (project number 61804098) and the Zhejiang Provincial Natural Science Foundation of China (project number LZ21E020002). Y.J.Z. thanks the Shenzhen Science and Technology Project under Grant no. JCYJ20180507182246321. A.V.K. also thanks the DFG for support within the projects KR 4866/2‐1 (project number 339 406129719). The computational support from the Technical University of Dresden computing cluster (TAURUS) and from High Performance Computing Center (HLRS) in Stuttgart, Germany is gratefully appreciated. The authors thank Scheumann for the metal deposition of the substrates. The nanofabrication facilities (NanoFaRo) at the Ion Beam Center at the HZDR are also gratefully acknowledged. Publisher Copyright: {\textcopyright} 2021 The Authors. Advanced Functional Materials published by Wiley-VCH GmbH",

year = "2021",

month = oct,

doi = "10.1002/adfm.202104960",

language = "English",

volume = "31",

journal = "Advanced Functional Materials",

issn = "1616-301X",

publisher = "Wiley",

number = "40",

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TY - JOUR

T1 - Enhanced Trion Emission in Monolayer MoSe2 by Constructing a Type-I Van Der Waals Heterostructure

AU - Duan, Juanmei

AU - Chava, Phanish

AU - Ghorbani-Asl, Mahdi

AU - Erb, Denise

AU - Hu, Liang

AU - Krasheninnikov, Arkady V.

AU - Schneider, Harald

AU - Rebohle, Lars

AU - Erbe, Artur

AU - Helm, Manfred

AU - Zeng, Yu Jia

AU - Zhou, Shengqiang

AU - Prucnal, Slawomir

N1 - Funding Information: J.M.D. thanks China Scholarship Council (File no. 201706890037). L.H. thanks the National Natural Science Foundation of China (project number 61804098) and the Zhejiang Provincial Natural Science Foundation of China (project number LZ21E020002). Y.J.Z. thanks the Shenzhen Science and Technology Project under Grant no. JCYJ20180507182246321. A.V.K. also thanks the DFG for support within the projects KR 4866/2‐1 (project number 339 406129719). The computational support from the Technical University of Dresden computing cluster (TAURUS) and from High Performance Computing Center (HLRS) in Stuttgart, Germany is gratefully appreciated. The authors thank Scheumann for the metal deposition of the substrates. The nanofabrication facilities (NanoFaRo) at the Ion Beam Center at the HZDR are also gratefully acknowledged. Publisher Copyright: © 2021 The Authors. Advanced Functional Materials published by Wiley-VCH GmbH

PY - 2021/10

Y1 - 2021/10

N2 - Trions, quasi-particles consisting of two electrons combined with one hole or of two holes with one electron, have recently been observed in transition metal dichalcogenides (TMDCs) and drawn increasing attention due to potential applications of these materials in light-emitting diodes, valleytronic devices as well as for being a testbed for understanding many-body phenomena. Therefore, it is important to enhance the trion emission and its stability. In this study, a MoSe2/FePS3 van der Waals heterostructure (vdWH) with type-I band alignment is constructed, which allows for carriers injection from FePS3 to MoSe2. At low temperatures, the neutral exciton (X0) emission in this vdWH is almost completely suppressed. The ITrion/Ix0 intensity ratio increases from 0.44 in a single MoSe2 monolayer to 20 in this heterostructure with the trion charging state changing from negative in the monolayer to positive in the heterostructure. The optical pumping with circularly polarized light shows a 14% polarization for the trion emission in MoSe2/FePS3. Moreover, forming such type-I vdWH also gives rise to a 20-fold enhancement of the room temperature photoluminescence from monolayer MoSe2. These results demonstrate a novel approach to convert excitons to trions in monolayer 2D TMDCs via interlayer doping effect using type-I band alignment in vdWH.

AB - Trions, quasi-particles consisting of two electrons combined with one hole or of two holes with one electron, have recently been observed in transition metal dichalcogenides (TMDCs) and drawn increasing attention due to potential applications of these materials in light-emitting diodes, valleytronic devices as well as for being a testbed for understanding many-body phenomena. Therefore, it is important to enhance the trion emission and its stability. In this study, a MoSe2/FePS3 van der Waals heterostructure (vdWH) with type-I band alignment is constructed, which allows for carriers injection from FePS3 to MoSe2. At low temperatures, the neutral exciton (X0) emission in this vdWH is almost completely suppressed. The ITrion/Ix0 intensity ratio increases from 0.44 in a single MoSe2 monolayer to 20 in this heterostructure with the trion charging state changing from negative in the monolayer to positive in the heterostructure. The optical pumping with circularly polarized light shows a 14% polarization for the trion emission in MoSe2/FePS3. Moreover, forming such type-I vdWH also gives rise to a 20-fold enhancement of the room temperature photoluminescence from monolayer MoSe2. These results demonstrate a novel approach to convert excitons to trions in monolayer 2D TMDCs via interlayer doping effect using type-I band alignment in vdWH.

KW - photoluminescence enhancement

KW - polarization

KW - trion/exciton intensity ratio

KW - type I

KW - van der Waals heterosturcture

UR - https://www.scopus.com/pages/publications/85109407688

U2 - 10.1002/adfm.202104960

DO - 10.1002/adfm.202104960

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