High Optical Response of Niobium-Doped WSe(2)-Layered Crystals

The optical properties of WSe(2)-layered crystals doped with 0.5% niobium (Nb) grown by the chemical vapor transport method were characterized by piezoreflectance (PzR), photoconductivity (PC) spectroscopy, frequency-dependent photocurrent, and time-resolved photoresponse. With the incorporation of...

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Autores principales: Hsu, Hung-Pin, Lin, Der-Yuh, Jheng, Jhin-Jhong, Lin, Pin-Cheng, Ko, Tsung-Shine
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6479778/
https://www.ncbi.nlm.nih.gov/pubmed/30974754
http://dx.doi.org/10.3390/ma12071161
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author Hsu, Hung-Pin
Lin, Der-Yuh
Jheng, Jhin-Jhong
Lin, Pin-Cheng
Ko, Tsung-Shine
author_facet Hsu, Hung-Pin
Lin, Der-Yuh
Jheng, Jhin-Jhong
Lin, Pin-Cheng
Ko, Tsung-Shine
author_sort Hsu, Hung-Pin
collection PubMed
description The optical properties of WSe(2)-layered crystals doped with 0.5% niobium (Nb) grown by the chemical vapor transport method were characterized by piezoreflectance (PzR), photoconductivity (PC) spectroscopy, frequency-dependent photocurrent, and time-resolved photoresponse. With the incorporation of 0.5% Nb, the WSe(2) crystal showed slight blue shifts in the near band edge excitonic transitions and exhibited strongly enhanced photoresponsivity. Frequency-dependent photocurrent and time-resolved photoresponse were measured to explore the kinetic decay processes of carriers. Our results show the potential application of layered crystals for photodetection devices based on Nb-doped WSe(2)-layered crystals.
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spelling pubmed-64797782019-04-29 High Optical Response of Niobium-Doped WSe(2)-Layered Crystals Hsu, Hung-Pin Lin, Der-Yuh Jheng, Jhin-Jhong Lin, Pin-Cheng Ko, Tsung-Shine Materials (Basel) Article The optical properties of WSe(2)-layered crystals doped with 0.5% niobium (Nb) grown by the chemical vapor transport method were characterized by piezoreflectance (PzR), photoconductivity (PC) spectroscopy, frequency-dependent photocurrent, and time-resolved photoresponse. With the incorporation of 0.5% Nb, the WSe(2) crystal showed slight blue shifts in the near band edge excitonic transitions and exhibited strongly enhanced photoresponsivity. Frequency-dependent photocurrent and time-resolved photoresponse were measured to explore the kinetic decay processes of carriers. Our results show the potential application of layered crystals for photodetection devices based on Nb-doped WSe(2)-layered crystals. MDPI 2019-04-10 /pmc/articles/PMC6479778/ /pubmed/30974754 http://dx.doi.org/10.3390/ma12071161 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Hsu, Hung-Pin
Lin, Der-Yuh
Jheng, Jhin-Jhong
Lin, Pin-Cheng
Ko, Tsung-Shine
High Optical Response of Niobium-Doped WSe(2)-Layered Crystals
title High Optical Response of Niobium-Doped WSe(2)-Layered Crystals
title_full High Optical Response of Niobium-Doped WSe(2)-Layered Crystals
title_fullStr High Optical Response of Niobium-Doped WSe(2)-Layered Crystals
title_full_unstemmed High Optical Response of Niobium-Doped WSe(2)-Layered Crystals
title_short High Optical Response of Niobium-Doped WSe(2)-Layered Crystals
title_sort high optical response of niobium-doped wse(2)-layered crystals
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6479778/
https://www.ncbi.nlm.nih.gov/pubmed/30974754
http://dx.doi.org/10.3390/ma12071161
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