TY - JOUR
T1 - Synthesis, Crystal Structure, and Luminescence Properties of a White-Light-Emitting Nitride Phosphor, Ca0.99Eu0.01AlSi4N7
AU - Yoshimura, Fumitaka
AU - Yamane, Hisanori
AU - Yamada, Takahiro
N1 - Funding Information:
The manuscript was written through contributions of all authors. All authors have given approval to the final version of the manuscript. F.Y. and H.Y. designed the study, wrote the initial draft of the manuscript, and contributed to synthesis of the samples, crystal structure analysis, and interpretation of the luminescence data. T.Y. calculated the electronic structure. This work was supported by Mitsubishi Chemical Group, Science and Technology Research Center, Inc. (a joint research of Tohoku University and Mitsubishi Chemical Group, Science and Technology Research Center, Inc.; J140000549). The authors declare no competing financial interest.
Publisher Copyright:
© 2019 American Chemical Society.
PY - 2020/1/6
Y1 - 2020/1/6
N2 - Colorless transparent single crystals of a new europium-doped calcium aluminum silicon nitride, Ca0.99Eu0.01AlSi4N7, were synthesized by heating a mixture of binary nitrides (Ca3N2, EuN, AlN, Si3N4, and Mg3N2) at 2150 °C under a nitrogen gas pressure of 0.85 MPa. The X-ray diffraction reflections from a single crystal were indexed with orthorhombic cell parameters a = 11.6819(3) Å, b = 21.0193(6) Å, and c = 4.91770(10) Å. The crystal structure was isomorphic to that of SrAlSi4N7:Eu (space group Pna21). One of the Ca/Eu sites was split into two sites of 4-fold and 8-fold nitrogen coordination. A white-light emission spectrum with two peaks at wavelengths of 498 and 614 nm was observed from the single crystals under 400 nm near-ultraviolet-light irradiation. The CIE1931 chromaticity of the white light was plotted at x = 0.378 and y = 0.429; the mean color-rendering index Ra was 81.
AB - Colorless transparent single crystals of a new europium-doped calcium aluminum silicon nitride, Ca0.99Eu0.01AlSi4N7, were synthesized by heating a mixture of binary nitrides (Ca3N2, EuN, AlN, Si3N4, and Mg3N2) at 2150 °C under a nitrogen gas pressure of 0.85 MPa. The X-ray diffraction reflections from a single crystal were indexed with orthorhombic cell parameters a = 11.6819(3) Å, b = 21.0193(6) Å, and c = 4.91770(10) Å. The crystal structure was isomorphic to that of SrAlSi4N7:Eu (space group Pna21). One of the Ca/Eu sites was split into two sites of 4-fold and 8-fold nitrogen coordination. A white-light emission spectrum with two peaks at wavelengths of 498 and 614 nm was observed from the single crystals under 400 nm near-ultraviolet-light irradiation. The CIE1931 chromaticity of the white light was plotted at x = 0.378 and y = 0.429; the mean color-rendering index Ra was 81.
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U2 - 10.1021/acs.inorgchem.9b02609
DO - 10.1021/acs.inorgchem.9b02609
M3 - Article
C2 - 31808685
AN - SCOPUS:85076780040
SN - 0020-1669
VL - 59
SP - 367
EP - 375
JO - Inorganic Chemistry
JF - Inorganic Chemistry
IS - 1
ER -