Effect of Surface Oxidation on Photocurrent in WSe1.95Te0.05 Nanosheets
Author Information
Author(s): Huang Shiu-Ming, Tu Tzu-Yueh, Wang Pin-Cing, Chou Mitch, Li Chang-Yu, Wu Hao-Ting, Hsieh Yue-Cheng, Chen Ruei-San
Primary Institution: National Sun Yat-Sen University
Hypothesis
How does surface oxidation affect the photocurrent response in WSe1.95Te0.05 nanosheets?
Conclusion
Surface oxidation enhances photocurrent response at 405 nm, shows no change at 532 nm, and suppresses it at 808 nm.
Supporting Evidence
- Photocurrent response is enhanced at 405 nm wavelength.
- No change in photocurrent at 532 nm wavelength.
- Photocurrent is suppressed at 808 nm wavelength.
- IPCE is expected to increase at 405 nm and decrease at 808 nm.
Takeaway
When WSe1.95Te0.05 nanosheets are exposed to air, their ability to generate electricity from light changes depending on the color of the light.
Methodology
Chemical vapor transport was used to grow WSe1.95Te0.05 nanosheets, and photocurrent was measured under different light wavelengths before and after half-year exposure.
Limitations
The study focused only on the surface oxidation effects and did not explore other environmental factors.
Digital Object Identifier (DOI)
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