Lithium ion intercalation in thin crystals of hexagonal TaSe2 gated by a polymer electrolyte
Ionic liquid gating has been used to modify the properties of layered transition metal dichalcogenides (TMDCs), including two-dimensional (2D) crystals of TMDCs used extensively recently in the device work, which has led to observations of properties not seen in the bulk. The main effect comes from...
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creator | Wu, Yueshen Lian, Hailong He, Jiaming Liu, Jinyu Wang, Shun Xing, Hui Mao, Zhiqiang Liu, Ying |
description | Ionic liquid gating has been used to modify the properties of layered transition metal dichalcogenides (TMDCs), including two-dimensional (2D) crystals of TMDCs used extensively recently in the device work, which has led to observations of properties not seen in the bulk. The main effect comes from the electrostatic gating due to the strong electric field at the interface. In addition, ionic liquid gating also leads to ion intercalation when the ion size of the gate electrolyte is small compared to the interlayer spacing of TMDCs. However, the microscopic processes of ion intercalation have rarely been explored in layered TMDCs. Here, we employed a technique combining photolithography device fabrication and electrical transport measurements on the thin crystals of hexagonal TaSe2 using multiple channel devices gated by a polymer electrolyte LiClO4/Polyethylene oxide (PEO). The gate voltage and time dependent source-drain resistances of these thin crystals were used to obtain information on the intercalation process, the effect of ion intercalation, and the correlation between the ion occupation of allowed interstitial sites and the device characteristics. We found a gate voltage controlled modulation of the charge density waves and a scattering rate of charge carriers. Our work suggests that ion intercalation can be a useful tool for layered materials engineering and 2D crystal device design. |
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The main effect comes from the electrostatic gating due to the strong electric field at the interface. In addition, ionic liquid gating also leads to ion intercalation when the ion size of the gate electrolyte is small compared to the interlayer spacing of TMDCs. However, the microscopic processes of ion intercalation have rarely been explored in layered TMDCs. Here, we employed a technique combining photolithography device fabrication and electrical transport measurements on the thin crystals of hexagonal TaSe2 using multiple channel devices gated by a polymer electrolyte LiClO4/Polyethylene oxide (PEO). The gate voltage and time dependent source-drain resistances of these thin crystals were used to obtain information on the intercalation process, the effect of ion intercalation, and the correlation between the ion occupation of allowed interstitial sites and the device characteristics. We found a gate voltage controlled modulation of the charge density waves and a scattering rate of charge carriers. Our work suggests that ion intercalation can be a useful tool for layered materials engineering and 2D crystal device design.</description><identifier>ISSN: 0003-6951</identifier><identifier>EISSN: 1077-3118</identifier><identifier>DOI: 10.1063/1.5008623</identifier><identifier>CODEN: APPLAB</identifier><language>eng</language><publisher>Melville: American Institute of Physics</publisher><subject>Applied physics ; Charge density waves ; Crystals ; Current carriers ; Design engineering ; Electric potential ; Electrolytes ; Intercalation ; Interlayers ; Ionic liquids ; Ions ; Layered materials ; Lithium ; Lithium ions ; Materials engineering ; MATERIALS SCIENCE ; Photolithography ; Polyethylenes ; Time dependence</subject><ispartof>Applied physics letters, 2018-01, Vol.112 (2)</ispartof><rights>Author(s)</rights><rights>2018 Author(s). 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The main effect comes from the electrostatic gating due to the strong electric field at the interface. In addition, ionic liquid gating also leads to ion intercalation when the ion size of the gate electrolyte is small compared to the interlayer spacing of TMDCs. However, the microscopic processes of ion intercalation have rarely been explored in layered TMDCs. Here, we employed a technique combining photolithography device fabrication and electrical transport measurements on the thin crystals of hexagonal TaSe2 using multiple channel devices gated by a polymer electrolyte LiClO4/Polyethylene oxide (PEO). The gate voltage and time dependent source-drain resistances of these thin crystals were used to obtain information on the intercalation process, the effect of ion intercalation, and the correlation between the ion occupation of allowed interstitial sites and the device characteristics. We found a gate voltage controlled modulation of the charge density waves and a scattering rate of charge carriers. Our work suggests that ion intercalation can be a useful tool for layered materials engineering and 2D crystal device design.</description><subject>Applied physics</subject><subject>Charge density waves</subject><subject>Crystals</subject><subject>Current carriers</subject><subject>Design engineering</subject><subject>Electric potential</subject><subject>Electrolytes</subject><subject>Intercalation</subject><subject>Interlayers</subject><subject>Ionic liquids</subject><subject>Ions</subject><subject>Layered materials</subject><subject>Lithium</subject><subject>Lithium ions</subject><subject>Materials engineering</subject><subject>MATERIALS SCIENCE</subject><subject>Photolithography</subject><subject>Polyethylenes</subject><subject>Time dependence</subject><issn>0003-6951</issn><issn>1077-3118</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNqdkF1LwzAUhoMoOKcX_oOgVwqdJ02bppcy_IKBF847IaRpumV0TU0ysf_ezA689-rwnvOcrxehSwIzAozekVkOwFlKj9CEQFEklBB-jCYAQBNW5uQUnXm_iTJPKZ2gj4UJa7PbYmM7bLqgnZKtDKPCsdRh5QYfZOuxbfBaf8uV7WSLl_JNp3glg65xNWCJe9sOW-2wbrUKLoqgz9FJExv1xSFO0fvjw3L-nCxen17m94tEUV6GpJEZg4zJNC1SqrJMMiC6LLO6IZUmnPGC15I1mscElzwrJK-g5KqGLL4IFZ2iq3Gu9cEIr0zQaq1s18VLBMmBMlpE6HqEemc_d9oHsbE7F1_xIiUk51AC45G6GSnlrPdON6J3ZivdIAiIvcOCiIPDkb0d2f3GX8_-B39Z9weKvm7oD6xdiHs</recordid><startdate>20180108</startdate><enddate>20180108</enddate><creator>Wu, Yueshen</creator><creator>Lian, Hailong</creator><creator>He, Jiaming</creator><creator>Liu, Jinyu</creator><creator>Wang, Shun</creator><creator>Xing, Hui</creator><creator>Mao, Zhiqiang</creator><creator>Liu, Ying</creator><general>American Institute of Physics</general><general>American Institute of Physics (AIP)</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>OIOZB</scope><scope>OTOTI</scope><orcidid>https://orcid.org/0000-0002-7062-7605</orcidid><orcidid>https://orcid.org/0000-0002-2594-5081</orcidid><orcidid>https://orcid.org/0000-0002-3101-2587</orcidid><orcidid>https://orcid.org/0000000270627605</orcidid><orcidid>https://orcid.org/0000000225945081</orcidid><orcidid>https://orcid.org/0000000231012587</orcidid></search><sort><creationdate>20180108</creationdate><title>Lithium ion intercalation in thin crystals of hexagonal TaSe2 gated by a polymer electrolyte</title><author>Wu, Yueshen ; 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The main effect comes from the electrostatic gating due to the strong electric field at the interface. In addition, ionic liquid gating also leads to ion intercalation when the ion size of the gate electrolyte is small compared to the interlayer spacing of TMDCs. However, the microscopic processes of ion intercalation have rarely been explored in layered TMDCs. Here, we employed a technique combining photolithography device fabrication and electrical transport measurements on the thin crystals of hexagonal TaSe2 using multiple channel devices gated by a polymer electrolyte LiClO4/Polyethylene oxide (PEO). The gate voltage and time dependent source-drain resistances of these thin crystals were used to obtain information on the intercalation process, the effect of ion intercalation, and the correlation between the ion occupation of allowed interstitial sites and the device characteristics. 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subjects | Applied physics Charge density waves Crystals Current carriers Design engineering Electric potential Electrolytes Intercalation Interlayers Ionic liquids Ions Layered materials Lithium Lithium ions Materials engineering MATERIALS SCIENCE Photolithography Polyethylenes Time dependence |
title | Lithium ion intercalation in thin crystals of hexagonal TaSe2 gated by a polymer electrolyte |
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