Photocurrent Enhancement of PtSe<sub>2</sub> Photodetectors by Using Au Nanorods

Compact and highly sensitive near-infrared photodetectors that are operable at room temperature are required for light detection and ranging and medical devices. Two-dimensional (2D) PtSe<sub>2</sub>, a transition metal dichalcogenide, is a candidate material for near-infrared light dete...

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Autores principales:	Tatsuya Nakazawa, Donghyun Kim, Shinichi Kato, Jusang Park, Jwamin Nam, Hyungjun Kim
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	2D PtSe<sub>2</sub> Au nanorods photodetector localized surface plasmon resonance Applied optics. Photonics TA1501-1820
Acceso en línea:	https://doaj.org/article/7d88ae69847b4fd3a2aed9f4d307909a
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spelling	oai:doaj.org-article:7d88ae69847b4fd3a2aed9f4d307909a2021-11-25T18:43:30ZPhotocurrent Enhancement of PtSe<sub>2</sub> Photodetectors by Using Au Nanorods10.3390/photonics81105052304-6732https://doaj.org/article/7d88ae69847b4fd3a2aed9f4d307909a2021-11-01T00:00:00Zhttps://www.mdpi.com/2304-6732/8/11/505https://doaj.org/toc/2304-6732Compact and highly sensitive near-infrared photodetectors that are operable at room temperature are required for light detection and ranging and medical devices. Two-dimensional (2D) PtSe<sub>2</sub>, a transition metal dichalcogenide, is a candidate material for near-infrared light detection. However, the photoresponse properties of 2D PtSe<sub>2</sub> are currently inferior to those of commercial materials. The localized surface plasmon resonance of Au has been widely used for photoelectric field enhancement and in photochemical reactions associated with phase relaxation from plasmon states that occur at specific wavelengths. Spherical Au nanocolloids exhibit an extinction peak in the visible light region, whereas nanorods can be tuned to exhibit the extinction peak in the near-infrared region by controlling their aspect ratio. In this study, hybrid Au nanorod/2D PtSe<sub>2</sub> structure was fabricated via spin coating nanorods, with plasmon peaks in the near-infrared region, on 2D PtSe<sub>2</sub>. Furthermore, the effect of the concentration of the nanorod solution on the photoresponse of nanorod/2D PtSe<sub>2</sub> was investigated. The photocurrent of 5 nM Au nanorod-coated 2D PtSe<sub>2</sub> was fivefold higher than that of bare 2D PtSe<sub>2</sub>. The responsivity was maximum 908 μW/A at 0.5 V bias voltage. In addition, the photocurrent enhancement mechanism by Au nanorods is discussed.Tatsuya NakazawaDonghyun KimShinichi KatoJusang ParkJwamin NamHyungjun KimMDPI AGarticle2D PtSe<sub>2</sub>Au nanorodsphotodetectorlocalized surface plasmon resonanceApplied optics. PhotonicsTA1501-1820ENPhotonics, Vol 8, Iss 505, p 505 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	2D PtSe<sub>2</sub> Au nanorods photodetector localized surface plasmon resonance Applied optics. Photonics TA1501-1820
spellingShingle	2D PtSe<sub>2</sub> Au nanorods photodetector localized surface plasmon resonance Applied optics. Photonics TA1501-1820 Tatsuya Nakazawa Donghyun Kim Shinichi Kato Jusang Park Jwamin Nam Hyungjun Kim Photocurrent Enhancement of PtSe<sub>2</sub> Photodetectors by Using Au Nanorods
description	Compact and highly sensitive near-infrared photodetectors that are operable at room temperature are required for light detection and ranging and medical devices. Two-dimensional (2D) PtSe<sub>2</sub>, a transition metal dichalcogenide, is a candidate material for near-infrared light detection. However, the photoresponse properties of 2D PtSe<sub>2</sub> are currently inferior to those of commercial materials. The localized surface plasmon resonance of Au has been widely used for photoelectric field enhancement and in photochemical reactions associated with phase relaxation from plasmon states that occur at specific wavelengths. Spherical Au nanocolloids exhibit an extinction peak in the visible light region, whereas nanorods can be tuned to exhibit the extinction peak in the near-infrared region by controlling their aspect ratio. In this study, hybrid Au nanorod/2D PtSe<sub>2</sub> structure was fabricated via spin coating nanorods, with plasmon peaks in the near-infrared region, on 2D PtSe<sub>2</sub>. Furthermore, the effect of the concentration of the nanorod solution on the photoresponse of nanorod/2D PtSe<sub>2</sub> was investigated. The photocurrent of 5 nM Au nanorod-coated 2D PtSe<sub>2</sub> was fivefold higher than that of bare 2D PtSe<sub>2</sub>. The responsivity was maximum 908 μW/A at 0.5 V bias voltage. In addition, the photocurrent enhancement mechanism by Au nanorods is discussed.
format	article
author	Tatsuya Nakazawa Donghyun Kim Shinichi Kato Jusang Park Jwamin Nam Hyungjun Kim
author_facet	Tatsuya Nakazawa Donghyun Kim Shinichi Kato Jusang Park Jwamin Nam Hyungjun Kim
author_sort	Tatsuya Nakazawa
title	Photocurrent Enhancement of PtSe<sub>2</sub> Photodetectors by Using Au Nanorods
title_short	Photocurrent Enhancement of PtSe<sub>2</sub> Photodetectors by Using Au Nanorods
title_full	Photocurrent Enhancement of PtSe<sub>2</sub> Photodetectors by Using Au Nanorods
title_fullStr	Photocurrent Enhancement of PtSe<sub>2</sub> Photodetectors by Using Au Nanorods
title_full_unstemmed	Photocurrent Enhancement of PtSe<sub>2</sub> Photodetectors by Using Au Nanorods
title_sort	photocurrent enhancement of ptse<sub>2</sub> photodetectors by using au nanorods
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/7d88ae69847b4fd3a2aed9f4d307909a
work_keys_str_mv	AT tatsuyanakazawa photocurrentenhancementofptsesub2subphotodetectorsbyusingaunanorods AT donghyunkim photocurrentenhancementofptsesub2subphotodetectorsbyusingaunanorods AT shinichikato photocurrentenhancementofptsesub2subphotodetectorsbyusingaunanorods AT jusangpark photocurrentenhancementofptsesub2subphotodetectorsbyusingaunanorods AT jwaminnam photocurrentenhancementofptsesub2subphotodetectorsbyusingaunanorods AT hyungjunkim photocurrentenhancementofptsesub2subphotodetectorsbyusingaunanorods
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Photocurrent Enhancement of PtSe<sub>2</sub> Photodetectors by Using Au Nanorods

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