Functional polyelectrolyte nanospaced MoS2 multilayers for enhanced photoluminescence

Piljae Joo; Kiyoung Jo; Gwanghyun Ahn; Damien Voiry; Hu Young Jeong; Sunmin Ryu; Manish Chhowalla; Byeong Su Kim

doi:10.1021/nl502883a

Functional polyelectrolyte nanospaced MoS₂ multilayers for enhanced photoluminescence

Piljae Joo, Kiyoung Jo, Gwanghyun Ahn, Damien Voiry, Hu Young Jeong, Sunmin Ryu, Manish Chhowalla, Byeong Su Kim

School of Engineering, Materials Science & Engineering

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

67 Scopus citations

Abstract

Molybdenum disulfide (MoS₂) multilayers with functional polyelectrolyte nanospacing layers are presented. Taking advantage of the facile method of layer-by-layer (LbL) assembly, individual chemically exfoliated MoS₂ layers are not only effectively isolated from interlayer coupling but also doped by functional polymeric layers. It is clearly demonstrated that MoS₂ nanosheets separated by polymeric trilayers exhibit a much larger increase in photoluminescence (PL) as the number of layers is increased. The enhanced PL has been correlated to the ratio of excitons to trions with the type of polymeric spacers. Because uniform heterogeneous interfaces can be formed between various transition metal dichalcogenides and other soft materials, LbL assembly offers possibilities for further development in the solution-processable assemblies of two-dimensional materials.

Original language	English (US)
Pages (from-to)	6456-6462
Number of pages	7
Journal	Nano Letters
Volume	14
Issue number	11
DOIs	https://doi.org/10.1021/nl502883a
State	Published - Nov 12 2014

All Science Journal Classification (ASJC) codes

Bioengineering
Chemistry(all)
Materials Science(all)
Condensed Matter Physics
Mechanical Engineering

Keywords

MoS
Two-dimensional materials
dopant
exciton
layer-by-layer assembly
photoluminescence

Access to Document

10.1021/nl502883a

Cite this

@article{af456b51e8d4495db1c21df9a90a79b6,

title = "Functional polyelectrolyte nanospaced MoS2 multilayers for enhanced photoluminescence",

abstract = "Molybdenum disulfide (MoS2) multilayers with functional polyelectrolyte nanospacing layers are presented. Taking advantage of the facile method of layer-by-layer (LbL) assembly, individual chemically exfoliated MoS2 layers are not only effectively isolated from interlayer coupling but also doped by functional polymeric layers. It is clearly demonstrated that MoS2 nanosheets separated by polymeric trilayers exhibit a much larger increase in photoluminescence (PL) as the number of layers is increased. The enhanced PL has been correlated to the ratio of excitons to trions with the type of polymeric spacers. Because uniform heterogeneous interfaces can be formed between various transition metal dichalcogenides and other soft materials, LbL assembly offers possibilities for further development in the solution-processable assemblies of two-dimensional materials.",

keywords = "MoS, Two-dimensional materials, dopant, exciton, layer-by-layer assembly, photoluminescence",

author = "Piljae Joo and Kiyoung Jo and Gwanghyun Ahn and Damien Voiry and Jeong, {Hu Young} and Sunmin Ryu and Manish Chhowalla and Kim, {Byeong Su}",

note = "Publisher Copyright: {\textcopyright} 2014 American Chemical Society.",

year = "2014",

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doi = "10.1021/nl502883a",

language = "English (US)",

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T1 - Functional polyelectrolyte nanospaced MoS2 multilayers for enhanced photoluminescence

AU - Joo, Piljae

AU - Jo, Kiyoung

AU - Ahn, Gwanghyun

AU - Voiry, Damien

AU - Jeong, Hu Young

AU - Ryu, Sunmin

AU - Chhowalla, Manish

AU - Kim, Byeong Su

PY - 2014/11/12

Y1 - 2014/11/12

N2 - Molybdenum disulfide (MoS2) multilayers with functional polyelectrolyte nanospacing layers are presented. Taking advantage of the facile method of layer-by-layer (LbL) assembly, individual chemically exfoliated MoS2 layers are not only effectively isolated from interlayer coupling but also doped by functional polymeric layers. It is clearly demonstrated that MoS2 nanosheets separated by polymeric trilayers exhibit a much larger increase in photoluminescence (PL) as the number of layers is increased. The enhanced PL has been correlated to the ratio of excitons to trions with the type of polymeric spacers. Because uniform heterogeneous interfaces can be formed between various transition metal dichalcogenides and other soft materials, LbL assembly offers possibilities for further development in the solution-processable assemblies of two-dimensional materials.

AB - Molybdenum disulfide (MoS2) multilayers with functional polyelectrolyte nanospacing layers are presented. Taking advantage of the facile method of layer-by-layer (LbL) assembly, individual chemically exfoliated MoS2 layers are not only effectively isolated from interlayer coupling but also doped by functional polymeric layers. It is clearly demonstrated that MoS2 nanosheets separated by polymeric trilayers exhibit a much larger increase in photoluminescence (PL) as the number of layers is increased. The enhanced PL has been correlated to the ratio of excitons to trions with the type of polymeric spacers. Because uniform heterogeneous interfaces can be formed between various transition metal dichalcogenides and other soft materials, LbL assembly offers possibilities for further development in the solution-processable assemblies of two-dimensional materials.

KW - MoS

KW - Two-dimensional materials

KW - dopant

KW - exciton

KW - layer-by-layer assembly

KW - photoluminescence

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JO - Nano Letters

JF - Nano Letters

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