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Article: Optical and electrical properties of two-dimensional palladium diselenide

TitleOptical and electrical properties of two-dimensional palladium diselenide
Authors
Issue Date2019
Citation
Applied Physics Letters, 2019, v. 114, n. 25, article no. 253102 How to Cite?
AbstractTwo-dimensional (2D) noble-metal dichalcogenides exhibit exceptionally strong thickness-dependent bandgaps, which can be leveraged in a wide variety of device applications. A detailed study of their optical (e.g., optical bandgaps) and electrical properties (e.g., mobilities) is important in determining potential future applications of these materials. In this work, we perform detailed optical and electrical characterization of 2D PdSe2 nanoflakes mechanically exfoliated from a single-crystalline source. Layer-dependent bandgap analysis from optical absorption results indicates that this material is an indirect semiconductor with bandgaps of approximately 1.37 and 0.50 eV for the monolayer and bulk, respectively. Spectral photoresponse measurements further confirm these bandgap values. Moreover, temperature-dependent electrical measurements of a 6.8-nm-thick PdSe2 flake-based transistor show effective electron mobilities of 130 and 520 cm2 V-1 s-1 at 300 K and 77 K, respectively. Finally, we demonstrate that PdSe2 can be utilized for short-wave infrared photodetectors. A room-temperature specific detectivity (D) of 1.8 × 1010 cm Hz1/2 W-1 at 1 μm with a band edge at 1.94 μm is achieved on a 6.8-nm-thick PdSe2 flake-based photodetector.
Persistent Identifierhttp://hdl.handle.net/10722/329569
ISSN
2023 Impact Factor: 3.5
2023 SCImago Journal Rankings: 0.976
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorZhang, George-
dc.contributor.authorAmani, Matin-
dc.contributor.authorChaturvedi, Apoorva-
dc.contributor.authorTan, Chaoliang-
dc.contributor.authorBullock, James-
dc.contributor.authorSong, Xiaohui-
dc.contributor.authorKim, Hyungjin-
dc.contributor.authorLien, Der Hsien-
dc.contributor.authorScott, Mary C.-
dc.contributor.authorZhang, Hua-
dc.contributor.authorJavey, Ali-
dc.date.accessioned2023-08-09T03:33:45Z-
dc.date.available2023-08-09T03:33:45Z-
dc.date.issued2019-
dc.identifier.citationApplied Physics Letters, 2019, v. 114, n. 25, article no. 253102-
dc.identifier.issn0003-6951-
dc.identifier.urihttp://hdl.handle.net/10722/329569-
dc.description.abstractTwo-dimensional (2D) noble-metal dichalcogenides exhibit exceptionally strong thickness-dependent bandgaps, which can be leveraged in a wide variety of device applications. A detailed study of their optical (e.g., optical bandgaps) and electrical properties (e.g., mobilities) is important in determining potential future applications of these materials. In this work, we perform detailed optical and electrical characterization of 2D PdSe2 nanoflakes mechanically exfoliated from a single-crystalline source. Layer-dependent bandgap analysis from optical absorption results indicates that this material is an indirect semiconductor with bandgaps of approximately 1.37 and 0.50 eV for the monolayer and bulk, respectively. Spectral photoresponse measurements further confirm these bandgap values. Moreover, temperature-dependent electrical measurements of a 6.8-nm-thick PdSe2 flake-based transistor show effective electron mobilities of 130 and 520 cm2 V-1 s-1 at 300 K and 77 K, respectively. Finally, we demonstrate that PdSe2 can be utilized for short-wave infrared photodetectors. A room-temperature specific detectivity (D) of 1.8 × 1010 cm Hz1/2 W-1 at 1 μm with a band edge at 1.94 μm is achieved on a 6.8-nm-thick PdSe2 flake-based photodetector.-
dc.languageeng-
dc.relation.ispartofApplied Physics Letters-
dc.titleOptical and electrical properties of two-dimensional palladium diselenide-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1063/1.5097825-
dc.identifier.scopuseid_2-s2.0-85068109495-
dc.identifier.volume114-
dc.identifier.issue25-
dc.identifier.spagearticle no. 253102-
dc.identifier.epagearticle no. 253102-
dc.identifier.isiWOS:000474433800016-

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