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Enhancing Sensitivity of a Single ZnO Micro-/Nanowire Photodetector by Piezo-phototronic Effect
Abstract
We demonstrate the piezoelectric effect on the responsivity of a metal-semiconductor-metal ZnO micro-/nanowire photodetector. The responsivity of the photodetector is respectively enhanced by 530%, 190%, 9%, and 15% upon 4.1 pW, 120.0 pW, 4.1 nW, and 180.4 nW UV light illumination onto the wire by introducing a -0.36% compressive strain in the wire, which effectively tuned the Schottky barrier height at the contact by the produced local piezopotential. After a systematic study on the Schottky barrier height change with tuning of the strain and the excitation light intensity, an in-depth understanding is provided about the physical mechanism of the coupling of piezoelectric, optical, and semiconducting properties. Our results show that the piezo-phototronic effect can enhance the detection sensitivity more than 5-fold for pW levels of light detection.
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Cites
Piezoelectric Nanogenerators Based on Zinc Oxide Nanowire Arrays
Wang, Z. L., & Song, J. (2006) · Science · doi:10.1126/science.1124005 · Cited by 7,922
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Cited by
Role of Metal Contacts in High-Performance Phototransistors Based on WSe2 Monolayers
Zhang, W., Chiu, M.-H., Chen, C.-H., Chen, W., Li, L.-J., & Wee, A. T. S. (2014) · ACS Nano · doi:10.1021/nn503521c · Cited by 438
Flexible Photodetectors Based on Novel Functional Materials
Xie, C., & Yan, F. (2017) · Small · doi:10.1002/smll.201701822 · Cited by 359
Metadata
- Authors
- Yang, Q., Guo, X., Wang, W., Zhang, Y., Xu, S., Lien, D. H., & Wang, Z. L.
- Venue
- ACS Nano
- Publisher
- American Chemical Society (ACS)
- Published
- 2010-10-04
- Volume
- 4
- Issue
- 10
- Pages
- 6285-6291
- ISSN
- 1936-0851 (ISSN-L)
- 1936-086X
- OpenAlex
- W2147412086
- Cited by
- 540
- References
- 1
- FWCI
- 13.44
- Type
- journal article
- Language
- en
- Open access
- closed
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- Yang, Q., Guo, X., Wang, W., Zhang, Y., Xu, S., Lien, D. H., & Wang, Z. L. (2010). Enhancing Sensitivity of a Single ZnO Micro-/Nanowire Photodetector by Piezo-phototronic Effect. ACS Nano. https://doi.org/10.1021/nn1022878
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