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

^*Tämän työn vastaava kirjoittaja

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Tutkimustuotos: Lehtiartikkeli › Article › Scientific › vertaisarvioitu

32 Sitaatiot (Scopus)

127 Lataukset (Pure)

Abstrakti

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.

Alkuperäiskieli	Englanti
Artikkeli	2104960
Sivumäärä	8
Julkaisu	Advanced Functional Materials
Vuosikerta	31
Numero	40
Varhainen verkossa julkaisun päivämäärä	2021
DOI - pysyväislinkit	https://doi.org/10.1002/adfm.202104960
Tila	Julkaistu - lokak. 2021
OKM-julkaisutyyppi	A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

Rahoitus

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.

Pääsy asiakirjaan

10.1002/adfm.202104960Lisenssi: CC BY-NC-ND

Enhanced Trion Emission in Monolayer MoSe2 by Constructing a Type-I Van Der Waals HeterostructureFinal published version, 3,44 MBLisenssi: CC BY-NC-ND

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@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

M3 - Article

AN - SCOPUS:85109407688

SN - 1616-301X

VL - 31

JO - Advanced Functional Materials

JF - Advanced Functional Materials

IS - 40

M1 - 2104960

ER -