Highly Luminous Ba2SiO4−δN2/3δ:Eu2+ Phosphor for NUV-LEDs: Origin of PL-Enhancement by N3−-Substitution
Abstract
:1. Introduction
2. Experimental
3. Results and Discussion
3.1. Rietveld Refinements
3.2. Secondary Ion Mass Spectrometry: Average N3− Content of BSON:Eu2+
3.3. Infrared Spectroscopy: The Evidence of N3− Substitution
3.4. X-Ray Photoelectron Spectroscopy: The Evidence of N3− Substitution
3.5. Photoluminescence Spectra
4. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Compound | BSO:Eu | BSON:Eu |
---|---|---|
Space Group | Pmcn | Pmcn |
Crystal System | Orthorhombic | Orthorhombic |
Z | 4 | 4 |
a(Å) | 5.809(6) | 5.806(7) |
b(Å) | 10.204(1) | 10.198(2) |
c(Å) | 7.500(6) | 7.497(1)) |
V(Å3) | 444.65(1) | 443.96(2) |
RBragg (%) | 5.33 | 9.37 |
Rwp (%) | 10.6 | 13.9 |
Rexp (%) | 6.07 | 6.85 |
χ2 (Rwp2/Rexp2) | 3.07 | 4.13 |
Compound | BSO:Eu | BSON:Eu |
---|---|---|
Ba1–O1 | 2.591 | 2.542 |
Ba1–O2 (× 2) | 2.918 | 2.922 |
Ba1–O3 (× 2) | 2.941 | 2.921 |
Ba1–O3 (× 2) | 3.009 | 3.051 |
Ba1–O2 | 3.101 | 3.132 |
Ba1–O3 (× 2) | 3.160 | 3.121 |
Average | 2.975 | 2.970 |
Ba2–O3 (× 2) | 2.658 | 2.621 |
Ba2–O2 | 2.681 | 2.662 |
Ba2–O2 | 2.781 | 2.752 |
Ba2–O3 (× 2) | 2.810 | 2.761 |
Ba2–O1 | 2.831 | 2.881 |
Ba2–O1 (× 2) | 3.129 | 3.115 |
Average | 2.832 | 2.810 |
Si–O3 (× 2) | 1.636 | 1.681 |
Si–O1 | 1.681 | 1.752 |
Si–O2 | 1.682 | 1.642 |
Average | 1.659 | 1.689 |
O1–Si–O2 | 111.1 | 112.2 |
O1–Si–O3 (× 2) | 112.1 | 109.1 |
O2–Si–O3 (× 2) | 107.2 | 109.1 |
O3–Si–O3 (× 2) | 106.8 | 109.1 |
Compound | Maximum IPL Ratio (%) 1 | Maximum ILED-PL Ratio (%) 1, 50 mA | Quantum Yield (%) |
---|---|---|---|
BSO: | 19 | 21 | 21 |
BSON: | 100 | 100 | 71 |
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Kim, D.; Kim, T.H.; Hong, T.E.; Bae, J.-S.; Kim, C.H.; Kim, J.; Kim, S.-J.; Jeon, K.-W.; Park, J.-C. Highly Luminous Ba2SiO4−δN2/3δ:Eu2+ Phosphor for NUV-LEDs: Origin of PL-Enhancement by N3−-Substitution. Materials 2020, 13, 1859. https://doi.org/10.3390/ma13081859
Kim D, Kim TH, Hong TE, Bae J-S, Kim CH, Kim J, Kim S-J, Jeon K-W, Park J-C. Highly Luminous Ba2SiO4−δN2/3δ:Eu2+ Phosphor for NUV-LEDs: Origin of PL-Enhancement by N3−-Substitution. Materials. 2020; 13(8):1859. https://doi.org/10.3390/ma13081859
Chicago/Turabian StyleKim, Donghyeon, Tae Hun Kim, Tae Eun Hong, Jong-Seong Bae, Chang Hae Kim, Jaegyeom Kim, Seung-Joo Kim, Ki-Wan Jeon, and Jung-Chul Park. 2020. "Highly Luminous Ba2SiO4−δN2/3δ:Eu2+ Phosphor for NUV-LEDs: Origin of PL-Enhancement by N3−-Substitution" Materials 13, no. 8: 1859. https://doi.org/10.3390/ma13081859