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Luminescence Properties of Eu2+-Activated Alkaline-Earth Silicon-Oxynitride MSi2O2-δN2+2/3δ (M = Ca, Sr, Ba): A Promising Class of Novel LED Conversion Phosphors
Abstract
The luminescence properties of Eu 2+ -activated alkaline-earth silicon-oxynitrides have been studied. In the BaO−SiO 2 −Si 3 N 4 system, a new BaSi 2 O 2 N 2 compound was obtained having the monoclinic structure with lattice parameters a = 14.070(4) Å, b = 7.276(2) Å, c = 13.181(3) Å, β = 107.74(6)°. All MSi 2 O 2 - δ N 2+2/3 δ:Eu 2+ (M = Ca, Sr, Ba) materials can be efficiently excited in the UV to visible region (370−460 nm), making them attractive as conversion phosphors for LED applications. A blue-green emission at 490−500 is observed for BaSi 2 O 2 N 2:Eu 2+, yellow emission at 560 nm for CaSi 2 O 2 - δ N 2+2/3 δ:Eu 2+ (δ ≈ 0), and a green-yellow emission peaking from 530 to 570 nm for SrSi 2 O 2 - δ N 2+2/3 δ:Eu 2+ (δ ≈ 1), the position depending on the exact value of δ. BaSi 2 O 2 N 2:Eu 2+ is the most promising conversion phosphor for white-light LEDs due to its high conversion efficiency for blue light from InGaN-based LEDs related to its very small Stokes shift.
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Shannon, R. D. (1976) · Acta Crystallographica Section A · doi:10.1107/s0567739476001551 · Cited by 66,145
Cited by
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Li, G., Tian, Y., Zhao, Y., & Lin, J. (2015) · Chemical Society Reviews · doi:10.1039/c4cs00446a · Cited by 965
Discovery and Optimization of Materials Using Evolutionary Approaches
Le, T. C., & Winkler, D. A. (2016) · Chemical Reviews · doi:10.1021/acs.chemrev.5b00691 · Cited by 204
Metadata
- Authors
- Li, Y. Q., Delsing, A. C. A., de With, G., & Hintzen, H. T.
- Venue
- Chemistry of Materials
- Publisher
- American Chemical Society (ACS)
- Published
- 2005-05-20
- Volume
- 17
- Issue
- 12
- Pages
- 3242-3248
- ISSN
- 0897-4756 (ISSN-L)
- 1520-5002
- OpenAlex
- W1986034944
- Cited by
- 589
- References
- 1
- FWCI
- 11.89
- Type
- journal article
- Language
- en
- Open access
- closed
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