High optical response of niobium-doped WSe2-layered crystals

Hung Pin Hsu; Der Yuh Lin; Jhin Jhong Jheng; Pin Cheng Lin; Tsung Shine Ko

doi:10.3390/ma12071161

High optical response of niobium-doped WSe₂-layered crystals

Hung Pin Hsu, Der Yuh Lin, Jhin Jhong Jheng, Pin Cheng Lin, Tsung Shine Ko

電子工程學系

研究成果: Article › 同行評審

1 引文斯高帕斯（Scopus）

摘要

The optical properties of WSe₂-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 WSe2 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 WSe₂-layered crystals.

原文	English
文章編號	1161
期刊	Materials
卷	12
發行號	7
DOIs	https://doi.org/10.3390/ma12071161
出版狀態	Published - 2019

All Science Journal Classification (ASJC) codes

Materials Science(all)

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10.3390/ma12071161

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引用此

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abstract = "The optical properties of WSe2-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 WSe2 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 WSe2-layered crystals.",

author = "Hsu, {Hung Pin} and Lin, {Der Yuh} and Jheng, {Jhin Jhong} and Lin, {Pin Cheng} and Ko, {Tsung Shine}",

note = "Funding Information: Funding: This research was funded by Ministry of Science and Technology (MOST 107-2221-E-131-032 and MOST 107-2112-M-018-002).",

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AU - Hsu, Hung Pin

AU - Lin, Der Yuh

AU - Jheng, Jhin Jhong

AU - Lin, Pin Cheng

AU - Ko, Tsung Shine

N1 - Funding Information: Funding: This research was funded by Ministry of Science and Technology (MOST 107-2221-E-131-032 and MOST 107-2112-M-018-002).

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