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Ce3+-Doping to Modulate Photoluminescence Kinetics for Efficient CsPbBr3 Nanocrystals Based Light-Emitting Diodes
Abstract
Inorganic perovskite CsPbBr 3 nanocrystals (NCs) are emerging, highly attractive light emitters with high color purity and good thermal stability for light-emitting diodes (LEDs). Their high photo/electroluminescence efficiencies are very important for fabricating efficient LEDs. Here, we propose a novel strategy to enhance the photo/electroluminescence efficiency of CsPbBr 3 NCs through doping of heterovalent Ce 3+ ions via a facile hot-injection method. The Ce 3+ cation was chosen as the dopant for CsPbBr 3 NCs by virtue of its similar ion radius and formation of higher energy level of conduction band with bromine in comparison with the Pb 2+ cation to maintain the integrity of perovskite structure without introducing additional trap states. It was found that by increasing the doping amount of Ce 3+ in CsPbBr 3 NCs to 2.88% (atomic percentage of Ce compared to Pb) the photoluminescence quantum yield (PLQY) of CsPbBr 3 NCs reached up to 89%, a factor of 2 increase in comparison with the native, undoped ones. The ultrafast transient absorption and time-resolved photoluminescence (PL) spectroscopy revealed that Ce 3+ -doping can significantly modulate the PL kinetics to enhance the PL efficiency of doped CsPbBr 3 NCs. As a result, the LED device fabricated by adopting Ce 3+ -doped CsPbBr 3 NCs as the emitting layers exhibited a pronounced improvement of electroluminescence with external quantum efficiency (EQE) from 1.6 to 4.4% via Ce 3+ -doping.
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Citations
Cited by
Wei, Y., Cheng, Z., & Lin, J. (2019) · Chemical Society Reviews · doi:10.1039/c8cs00740c · Cited by 1,206
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Zhou, Y., Chen, J., Bakr, O. M., & Sun, H.-T. (2018) · Chemistry of Materials · doi:10.1021/acs.chemmater.8b02989 · Cited by 650
Achieving Near-Unity Photoluminescence Efficiency for Blue-Violet-Emitting Perovskite Nanocrystals
Mondal, N., De, A., & Samanta, A. (2019) · ACS Energy Letters · doi:10.1021/acsenergylett.8b01909 · Cited by 435
Yang, J.-N., Song, Y., Yao, J.-S., Wang, K.-H., Wang, J.-J., Zhu, B.-S., Yao, M.-M., Rahman, S. U., Lan, Y.-F., Fan, F.-J., et al. (2020) · Journal of the American Chemical Society · doi:10.1021/jacs.9b11719 · Cited by 361
Self-citationYao, J.-S., Ge, J., Wang, K.-H., Zhang, G., Zhu, B.-S., Chen, C., Zhang, Q., Luo, Y., Yu, S.-H., & Yao, H.-B. (2019) · Journal of the American Chemical Society · doi:10.1021/jacs.8b11447 · Cited by 292
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Metadata
- Authors
- Yao, J.-S., Ge, J., Han, B.-N., Wang, K.-H., Yao, H.-B., Yu, H.-L., Li, J.-H., Zhu, B.-S., Song, J.-Z., Chen, C., Zhang, Q., Zeng, H.-B., Luo, Y., & Yu, S.-H.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2018-01-17
- Volume
- 140
- Issue
- 10
- Pages
- 3626-3634
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2782688141
- Cited by
- 549
- References
- 0
- FWCI
- 26.81
- Type
- journal article
- Language
- en
- Open access
- closed
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- Yao, J.-S., Ge, J., Han, B.-N., Wang, K.-H., Yao, H.-B., Yu, H.-L., Li, J.-H., Zhu, B.-S., Song, J.-Z., Chen, C., Zhang, Q., Zeng, H.-B., Luo, Y., & Yu, S.-H. (2018). Ce3+-Doping to Modulate Photoluminescence Kinetics for Efficient CsPbBr3 Nanocrystals Based Light-Emitting Diodes. Journal of the American Chemical Society. https://doi.org/10.1021/jacs.7b11955
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