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Centimeter‐Sized Cs4PbBr6 Crystals with Embedded CsPbBr3 Nanocrystals Showing Superior Photoluminescence: Nonstoichiometry Induced Transformation and Light‐Emitting Applications
Abstract
An HBr‐assisted slow cooling method is developed for the growth of centimeter‐sized Cs 4 PbBr 6 crystals. The obtained crystals show strong green photoluminescence with absolute photoluminescence quantum yields up to 97%. More importantly, the evolution process and structural characterizations support that the nonstoichiometry of initial Cs 4 PbBr 6 crystals induce the formation of nanosized CsPbBr 3 nanocrystals in crystalline Cs 4 PbBr 6 matrices. Furthermore, high efficiency and wide color gamut prototype white light‐emitting diode devices are also demonstrated by combining the highly luminescent Cs 4 PbBr 6 crystals as green emitters and commercial K 2 SiF 6:Mn 4+ phosphor as red emitters with blue emitting GaN chips. The optimized devices generate high‐quality white light with luminous efficiency of ≈151 lm W−1 and color gamut of 90.6% Rec. 2020 at 20 mA, which is much better than that based on conventional perovskite nanocrystals. The combination of improved efficiency and better stability with comparable color quality provides an alternative choice for liquid crystal display backlights.
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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
Zhao, M., Liao, H., Ning, L., Zhang, Q., Liu, Q., & Xia, Z. (2018) · Advanced Materials · doi:10.1002/adma.201802489 · Cited by 532
Han, Y., Yue, S., & Cui, B. (2021) · Advanced Science · doi:10.1002/advs.202004805 · Cited by 282
Zero-Dimensional Cesium Lead Halides: History, Properties, and Challenges
Akkerman, Q. A., Abdelhady, A. L., & Manna, L. (2018) · The Journal of Physical Chemistry Letters · doi:10.1021/acs.jpclett.8b00572 · Cited by 258
Myung, C. W., Hajibabaei, A., Cha, J., Ha, M., Kim, J., & Kim, K. S. (2022) · Advanced Energy Materials · doi:10.1002/aenm.202202279 · Cited by 54
Metadata
- Authors
- Chen, X., Zhang, F., Ge, Y., Shi, L., Huang, S., Tang, J., Lv, Z., Zhang, L., Zou, B., & Zhong, H.
- Venue
- Advanced Functional Materials
- Publisher
- Wiley
- Published
- 2018-02-19
- Volume
- 28
- Issue
- 16
- ISSN
- 1616-301X (ISSN-L)
- 1616-3028
- OpenAlex
- W2792320479
- Cited by
- 305
- References
- 0
- FWCI
- 18.25
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Centimeter‐Sized Cs4PbBr6 Crystals with Embedded CsPbBr3 Nanocrystals Showing Superior Photoluminescence: Nonstoichiometry Induced Transformation and Light‐Emitting Applications. https://app.cochat.ai/papers/10.1002/adfm.201706567
- The paper
- Chen, X., Zhang, F., Ge, Y., Shi, L., Huang, S., Tang, J., Lv, Z., Zhang, L., Zou, B., & Zhong, H. (2018). Centimeter‐Sized Cs4PbBr6 Crystals with Embedded CsPbBr3 Nanocrystals Showing Superior Photoluminescence: Nonstoichiometry Induced Transformation and Light‐Emitting Applications. Advanced Functional Materials. https://doi.org/10.1002/adfm.201706567
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