Controllable synthesis of molybdenum tungsten disulfide alloy for vertically composition-controlled multilayer

Jeong Gyu Song, Gyeong Hee Ryu, Su Jeong Lee, Sangwan Sim, Chang Wan Lee, Taejin Choi, Hanearl Jung, Youngjun Kim, Zonghoon Lee, Jae Min Myung, Christian Dussarrat, Clement Lansalot-Matras, Jusang Park, Hyunyong Choi, Hyungjun Kim

Research output: Contribution to journalArticle

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Abstract

The effective synthesis of two-dimensional transition metal dichalcogenides alloy is essential for successful application in electronic and optical devices based on a tunable band gap. Here we show a synthesis process for Mo1−xWxS2 alloy using sulfurization of super-cycle atomic layer deposition Mo1−xWxOy. Various spectroscopic and microscopic results indicate that the synthesized Mo1−xWxS2 alloys have complete mixing of Mo and W atoms and tunable band gap by systematically controlled composition and layer number. Based on this, we synthesize a vertically composition-controlled (VCC) Mo1−xWxS2 multilayer using five continuous super-cycles with different cycle ratios for each super-cycle. Angle-resolved X-ray photoemission spectroscopy, Raman and ultraviolet–visible spectrophotometer results reveal that a VCC Mo1−xWxS2 multilayer has different vertical composition and broadband light absorption with strong interlayer coupling within a VCC Mo1−xWxS2 multilayer. Further, we demonstrate that a VCC Mo1−xWxS2 multilayer photodetector generates three to four times greater photocurrent than MoS2- and WS2-based devices, owing to the broadband light absorption.
Original languageEnglish
Article number7817
JournalNature Communications
Publication statusPublished - 2015 Jul 23

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Tungsten
Molybdenum
disulfides
Disulfides
molybdenum
Multilayers
tungsten
synthesis
Chemical analysis
Photoelectron Spectroscopy
Optical Devices
cycles
electromagnetic absorption
Light absorption
Energy gap
Metals
X-Rays
Transition metal alloys
broadband
Equipment and Supplies

Cite this

Song, J. G., Ryu, G. H., Lee, S. J., Sim, S., Lee, C. W., Choi, T., ... Kim, H. (2015). Controllable synthesis of molybdenum tungsten disulfide alloy for vertically composition-controlled multilayer. Nature Communications, [7817].
Song, Jeong Gyu ; Ryu, Gyeong Hee ; Lee, Su Jeong ; Sim, Sangwan ; Lee, Chang Wan ; Choi, Taejin ; Jung, Hanearl ; Kim, Youngjun ; Lee, Zonghoon ; Myung, Jae Min ; Dussarrat, Christian ; Lansalot-Matras, Clement ; Park, Jusang ; Choi, Hyunyong ; Kim, Hyungjun. / Controllable synthesis of molybdenum tungsten disulfide alloy for vertically composition-controlled multilayer. In: Nature Communications. 2015.
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abstract = "The effective synthesis of two-dimensional transition metal dichalcogenides alloy is essential for successful application in electronic and optical devices based on a tunable band gap. Here we show a synthesis process for Mo1−xWxS2 alloy using sulfurization of super-cycle atomic layer deposition Mo1−xWxOy. Various spectroscopic and microscopic results indicate that the synthesized Mo1−xWxS2 alloys have complete mixing of Mo and W atoms and tunable band gap by systematically controlled composition and layer number. Based on this, we synthesize a vertically composition-controlled (VCC) Mo1−xWxS2 multilayer using five continuous super-cycles with different cycle ratios for each super-cycle. Angle-resolved X-ray photoemission spectroscopy, Raman and ultraviolet–visible spectrophotometer results reveal that a VCC Mo1−xWxS2 multilayer has different vertical composition and broadband light absorption with strong interlayer coupling within a VCC Mo1−xWxS2 multilayer. Further, we demonstrate that a VCC Mo1−xWxS2 multilayer photodetector generates three to four times greater photocurrent than MoS2- and WS2-based devices, owing to the broadband light absorption.",
author = "Song, {Jeong Gyu} and Ryu, {Gyeong Hee} and Lee, {Su Jeong} and Sangwan Sim and Lee, {Chang Wan} and Taejin Choi and Hanearl Jung and Youngjun Kim and Zonghoon Lee and Myung, {Jae Min} and Christian Dussarrat and Clement Lansalot-Matras and Jusang Park and Hyunyong Choi and Hyungjun Kim",
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Song, JG, Ryu, GH, Lee, SJ, Sim, S, Lee, CW, Choi, T, Jung, H, Kim, Y, Lee, Z, Myung, JM, Dussarrat, C, Lansalot-Matras, C, Park, J, Choi, H & Kim, H 2015, 'Controllable synthesis of molybdenum tungsten disulfide alloy for vertically composition-controlled multilayer', Nature Communications.

Controllable synthesis of molybdenum tungsten disulfide alloy for vertically composition-controlled multilayer. / Song, Jeong Gyu; Ryu, Gyeong Hee; Lee, Su Jeong; Sim, Sangwan; Lee, Chang Wan; Choi, Taejin; Jung, Hanearl; Kim, Youngjun; Lee, Zonghoon; Myung, Jae Min; Dussarrat, Christian; Lansalot-Matras, Clement; Park, Jusang; Choi, Hyunyong; Kim, Hyungjun.

In: Nature Communications, 23.07.2015.

Research output: Contribution to journalArticle

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AU - Song, Jeong Gyu

AU - Ryu, Gyeong Hee

AU - Lee, Su Jeong

AU - Sim, Sangwan

AU - Lee, Chang Wan

AU - Choi, Taejin

AU - Jung, Hanearl

AU - Kim, Youngjun

AU - Lee, Zonghoon

AU - Myung, Jae Min

AU - Dussarrat, Christian

AU - Lansalot-Matras, Clement

AU - Park, Jusang

AU - Choi, Hyunyong

AU - Kim, Hyungjun

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N2 - The effective synthesis of two-dimensional transition metal dichalcogenides alloy is essential for successful application in electronic and optical devices based on a tunable band gap. Here we show a synthesis process for Mo1−xWxS2 alloy using sulfurization of super-cycle atomic layer deposition Mo1−xWxOy. Various spectroscopic and microscopic results indicate that the synthesized Mo1−xWxS2 alloys have complete mixing of Mo and W atoms and tunable band gap by systematically controlled composition and layer number. Based on this, we synthesize a vertically composition-controlled (VCC) Mo1−xWxS2 multilayer using five continuous super-cycles with different cycle ratios for each super-cycle. Angle-resolved X-ray photoemission spectroscopy, Raman and ultraviolet–visible spectrophotometer results reveal that a VCC Mo1−xWxS2 multilayer has different vertical composition and broadband light absorption with strong interlayer coupling within a VCC Mo1−xWxS2 multilayer. Further, we demonstrate that a VCC Mo1−xWxS2 multilayer photodetector generates three to four times greater photocurrent than MoS2- and WS2-based devices, owing to the broadband light absorption.

AB - The effective synthesis of two-dimensional transition metal dichalcogenides alloy is essential for successful application in electronic and optical devices based on a tunable band gap. Here we show a synthesis process for Mo1−xWxS2 alloy using sulfurization of super-cycle atomic layer deposition Mo1−xWxOy. Various spectroscopic and microscopic results indicate that the synthesized Mo1−xWxS2 alloys have complete mixing of Mo and W atoms and tunable band gap by systematically controlled composition and layer number. Based on this, we synthesize a vertically composition-controlled (VCC) Mo1−xWxS2 multilayer using five continuous super-cycles with different cycle ratios for each super-cycle. Angle-resolved X-ray photoemission spectroscopy, Raman and ultraviolet–visible spectrophotometer results reveal that a VCC Mo1−xWxS2 multilayer has different vertical composition and broadband light absorption with strong interlayer coupling within a VCC Mo1−xWxS2 multilayer. Further, we demonstrate that a VCC Mo1−xWxS2 multilayer photodetector generates three to four times greater photocurrent than MoS2- and WS2-based devices, owing to the broadband light absorption.

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JO - Nature Communications

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