Enhancement of Photocurrent Stability in Oxidation-Resistant WSe<sub>1.95</sub>Te<sub>0.05</sub> Nanosheets
The electrical and optical characteristics of semimetallic WSe<sub>1.95</sub>Te<sub>0.05</sub> nanosheets have been comprehensively studied. The current-voltage measurements reveal a linear response when they are interfaced with platinum (Pt) electrodes, confirming the establishment of an ohmic contact between the WSe<sub>1.95</sub>Te<sub>0.05</sub> nanosheets and the Pt contacts. Additionally, the observed photocurrent demonstrates a direct linear correlation with the applied voltage and scales proportionally with the intensity of the incident light. Remarkably, the device achieves an exceptional photoresponsivity of 108 A/W at 0.5 V without requiring surface modifications. Furthermore, the electrical resistivity and photocurrent exhibit admirable stability, remaining unaffected by air exposure under ambient conditions for more than six months. These results underscore the inherent capabilities of WSe<sub>1.95</sub>Te<sub>0.05</sub> nanosheets and their potential as highly reliable materials for advanced photodetection applications.
Authors
- Ruei‐San Chen (ORCID: https://orcid.org/0000-0003-0042-2521)
- Ankush Saxena (ORCID: https://orcid.org/0000-0001-9613-6014)
- Tzu-Yueh Tu
- Mitch M. C. Chou (ORCID: https://orcid.org/0000-0003-0113-7191)
- Shiu‐Ming Huang (ORCID: https://orcid.org/0000-0002-0085-1353)
- Pin-Cing Wang (ORCID: https://orcid.org/0000-0001-5162-7370)
Institutions
- National Sun Yat-sen University (TW)
- National Taiwan University of Science and Technology (TW)
- National Cheng Kung University (TW)
Publication Details
- Journal
- ACS Omega
- Published
- 2025-06-13
- DOI
- https://doi.org/10.1021/acsomega.5c02983
- Citations
- 4
- Primary Topic
- 2D Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 2.07
Funders
- Ministry of Science and Technology, Taiwan