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Surface Passivation of Bismuth-Based Perovskite Variant Quantum Dots To Achieve Efficient Blue Emission
Abstract
Metal halide perovskite quantum dots (QDs) recently have attracted great research attentions. However, blue-emitting perovskite QDs generally suffer from low photoluminescence quantum yield (PLQY) because of easily formed defects and insufficient surface passivation. Replacement of lead with low toxicity elements is also preferred toward potential commercial applications. Here, we apply Cl-passivation to boost the PLQY of MA 3 Bi 2 Br 9 QDs to 54.1% at the wavelength of 422 nm, a new PLQY record for blue emissive, lead-free perovskite QDs. Because of the incompatible crystal structures between MA 3 Bi 2 Br 9 and MA 3 Bi 2 Cl 9 and the careful kinetic control during the synthesis, Cl – anions are engineered to mainly locate on the surface of QDs acting as passivating ligands, which effectively suppress surface defects and enhance the PLQY. Our results highlight the potential of MA 3 Bi 2 Br 9 QDs for applications of phosphors, scintillators, and light-emitting diodes.
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Cites
The ASA Statement on p -Values: Context, Process, and Purpose
Wasserstein, R. L., & Lazar, N. A. (2016) · The American Statistician · doi:10.1080/00031305.2016.1154108 · Cited by 6,306
Cited by
Wei, Y., Cheng, Z., & Lin, J. (2019) · Chemical Society Reviews · doi:10.1039/c8cs00740c · Cited by 1,206
Shahbazi, M.-A., Faghfouri, L., Ferreira, M. P. A., Figueiredo, P., Maleki, H., Sefat, F., Hirvonen, J., & Santos, H. A. (2020) · Chemical Society Reviews · doi:10.1039/c9cs00283a · Cited by 523
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
Halide Perovskite, a Potential Scintillator for X‐Ray Detection
Zhou, F., Li, Z., Lan, W., Wang, Q., Ding, L., & Jin, Z. (2020) · Small Methods · doi:10.1002/smtd.202000506 · Cited by 292
Advanced Organic–Inorganic Hybrid Materials for Optoelectronic Applications
Zhou, K., Qi, B., Liu, Z., Wang, X., Sun, Y., & Zhang, L. (2024) · Advanced Functional Materials · doi:10.1002/adfm.202411671 · Cited by 228
Metadata
- Authors
- Leng, M., Yang, Y., Chen, Z., Gao, W., Zhang, J., Niu, G., Li, D., Song, H., Zhang, J., Jin, S., & Tang, J.
- Venue
- Nano Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2018-08-14
- Volume
- 18
- Issue
- 9
- Pages
- 6076-6083
- ISSN
- 1530-6984 (ISSN-L)
- 1530-6992
- OpenAlex
- W2887910479
- Cited by
- 209
- References
- 1
- FWCI
- 9.69
- Type
- journal article
- Language
- en
- Open access
- closed
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- The paper
- Leng, M., Yang, Y., Chen, Z., Gao, W., Zhang, J., Niu, G., Li, D., Song, H., Zhang, J., Jin, S., & Tang, J. (2018). Surface Passivation of Bismuth-Based Perovskite Variant Quantum Dots To Achieve Efficient Blue Emission. Nano Letters. https://doi.org/10.1021/acs.nanolett.8b03090
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