The oxidation enhancement photocurrent response in WSe1.95Te0.05 nanosheets

[Display omitted] The photocurrent was detected in the WSe1.95Te0.05 with and without surface oxidation. The linear current–voltage relation reveal the WSe1.95Te0.05 nanosheet/Pt ohmic contact. The XPS spectrum reveals the WO3 was formed during the oxidation. The photo responsivity increase from 173...

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Bibliographic Details
Published inApplied surface science Vol. 628; p. 156488
Main Authors Huang, Shiu-Ming, Tu, Tzu-Yueh, Wang, Pin-Cing, Li, Chang-Yu, Chou, Mitch, Wu, Hao-Ting, Hsieh, Yue-Cheng, Chen, Ruei-San
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.08.2023
Subjects
Incident photon-to-current efficiency (IPCE)
Photoncurrent
Transition Metal Dichalcogenides
WSe1.95Te0.05
Transition Metal Dichalcogenides
WSe1.95Te0.05
Photoncurrent
Incident photon-to-current efficiency (IPCE)
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Summary:[Display omitted] The photocurrent was detected in the WSe1.95Te0.05 with and without surface oxidation. The linear current–voltage relation reveal the WSe1.95Te0.05 nanosheet/Pt ohmic contact. The XPS spectrum reveals the WO3 was formed during the oxidation. The photo responsivity increase from 173 A/W to 442 A/W at 0.5 V after air exposuring in ambient conditions over half year. This value is the highest observed values in two-dimensional transition metal dichalcogenides without artificial treatments. The greatly photocurrent enhancement originated from the incident photo-to-current efficiency (IPCE) enhancement of WO3 at the wavelength of 405 nm.
ISSN:0169-4332
1873-5584
DOI:10.1016/j.apsusc.2023.156488