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Electrically Tunable Valley-Light Emitting Diode (vLED) Based on CVD-Grown Monolayer WS2
Abstract
Owing to direct band gap and strong spin-orbit coupling, monolayer transition-metal dichalcogenides (TMDs) exhibit rich new physics and great applicable potentials. The remarkable valley contrast and light emission promise such two-dimensional (2D) semiconductors a bright future of valleytronics and light-emitting diodes (LEDs). Though the electroluminescence (EL) has been observed in mechanically exfoliated small flakes of TMDs, considering real applications, a strategy that could offer mass-product and high compatibility is greatly demanded. Large-area and high-quality samples prepared by chemical vapor deposition (CVD) are perfect candidates toward such goal. Here, we report the first demonstration of electrically tunable chiral EL from CVD-grown monolayer WS2 by constructing a p-i-n heterojunction. The chirality contrast of the overall EL reaches as high as 81% and can be effectively modulated by forward current. The success of fabricating valley LEDs based on CVD WS2 opens up many opportunities for developing large-scale production of unconventional 2D optoelectronic devices.
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Cited by
Schaibley, J. R., Yu, H., Clark, G., Rivera, P., Ross, J. S., Seyler, K. L., Yao, W., & Xu, X. (2016) · Nature Reviews Materials · doi:10.1038/natrevmats.2016.55 · Cited by 2,652
Samadi, M., Sarikhani, N., Zirak, M., Zhang, H., Zhang, H.-L., & Moshfegh, A. Z. (2018) · Nanoscale Horizons · doi:10.1039/c7nh00137a · Cited by 408
Atomically thin quantum light-emitting diodes
Palacios-Berraquero, C., Barbone, M., Kara, D. M., Chen, X., Goykhman, I., Yoon, D., Ott, A. K., Beitner, J., Watanabe, K., Taniguchi, T., et al. (2016) · Nature Communications · doi:10.1038/ncomms12978 · Cited by 334
Tunable Optical Properties of 2D Materials and Their Applications
Ma, Q., Ren, G., Xu, K., & Ou, J. Z. (2021) · Advanced Optical Materials · doi:10.1002/adom.202001313 · Cited by 269
Metadata
- Authors
- Yang, W., Shang, J., Wang, J., Shen, X., Cao, B., Peimyoo, N., Zou, C., Chen, Y., Wang, Y., Cong, C., Huang, W., & Yu, T.
- Venue
- Nano Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2016-02-15
- Volume
- 16
- Issue
- 3
- Pages
- 1560-1567
- ISSN
- 1530-6984 (ISSN-L)
- 1530-6992
- OpenAlex
- W2255825515
- Cited by
- 216
- References
- 0
- FWCI
- 13.68
- Type
- journal article
- Language
- en
- Open access
- closed
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- Yang, W., Shang, J., Wang, J., Shen, X., Cao, B., Peimyoo, N., Zou, C., Chen, Y., Wang, Y., Cong, C., Huang, W., & Yu, T. (2016). Electrically Tunable Valley-Light Emitting Diode (vLED) Based on CVD-Grown Monolayer WS2. Nano Letters. https://doi.org/10.1021/acs.nanolett.5b04066
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