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Open AccessArticle

High Optical Response of Niobium-Doped WSe2-Layered Crystals

Department of Electronic Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan
Department of Electronic Engineering, National Changhua University of Education, Changhua 50074, Taiwan
Author to whom correspondence should be addressed.
Materials 2019, 12(7), 1161;
Received: 24 January 2019 / Revised: 2 April 2019 / Accepted: 9 April 2019 / Published: 10 April 2019
(This article belongs to the Special Issue 2D Materials for Advanced Devices)
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. View Full-Text
Keywords: 2D chalcogenides; photoconductivity; photoresponse 2D chalcogenides; photoconductivity; photoresponse
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MDPI and ACS Style

Hsu, H.-P.; Lin, D.-Y.; Jheng, J.-J.; Lin, P.-C.; Ko, T.-S. High Optical Response of Niobium-Doped WSe2-Layered Crystals. Materials 2019, 12, 1161.

AMA Style

Hsu H-P, Lin D-Y, Jheng J-J, Lin P-C, Ko T-S. High Optical Response of Niobium-Doped WSe2-Layered Crystals. Materials. 2019; 12(7):1161.

Chicago/Turabian Style

Hsu, Hung-Pin; Lin, Der-Yuh; Jheng, Jhin-Jhong; Lin, Pin-Cheng; Ko, Tsung-Shine. 2019. "High Optical Response of Niobium-Doped WSe2-Layered Crystals" Materials 12, no. 7: 1161.

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