High optical response of niobium-doped WSe2-layered crystals

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

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1 Citation (Scopus)

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.

Original languageEnglish
Article number1161
JournalMaterials
Volume12
Issue number7
DOIs
Publication statusPublished - 2019

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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