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Rare Earth Doped Lanthanum Calcium Borate Polycrystalline Red Phosphors
Joint Authors
Xiong, H. H.
Zhu, C.
Zhao, X.
Wang, Z. Q.
Lin, H.
Source
Advances in Materials Science and Engineering
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-08-05
Country of Publication
Egypt
No. of Pages
7
Abstract EN
Single-phased Sm3+ doped lanthanum calcium borate (Sm xLa2−x CaB10O19, SLCB, x = 0.06 ) polycrystalline red phosphor was prepared by solid-state reaction method.
The phosphor has two main excitation peaks located at 398.5 nm and 469.0 nm, which are nicely in accordance with the emitting wavelengths of commercial near-UV and blue light emitting diode chips.
Under the excitation of 398.0 nm, the dominant red emission of Sm3+ in SLCB phosphor is centered at 598.0 nm corresponding to the transition of 4G5/2 → 6H7/2.
The Eu3+ fluorescence in the red spectral region is applied as a spectroscopic probe to reveal the local site symmetry in the host lattice and, hence, Judd-Ofelt parameters Ω t ( t = 2 , 4 ) of Eu3+ in the phosphor matrix are derived to be 3.62 × 10 -20 and 1.97 × 10 -20 cm2, indicating a high asymmetrical and strong covalent environment around rare earth luminescence centers.
Herein, the red phosphors are promising good candidates employed in white light emitting diodes (LEDs) illumination.
American Psychological Association (APA)
Xiong, H. H.& Zhu, C.& Zhao, X.& Wang, Z. Q.& Lin, H.. 2014. Rare Earth Doped Lanthanum Calcium Borate Polycrystalline Red Phosphors. Advances in Materials Science and Engineering،Vol. 2014, no. 2014, pp.1-7.
https://search.emarefa.net/detail/BIM-1015875
Modern Language Association (MLA)
Xiong, H. H.…[et al.]. Rare Earth Doped Lanthanum Calcium Borate Polycrystalline Red Phosphors. Advances in Materials Science and Engineering No. 2014 (2014), pp.1-7.
https://search.emarefa.net/detail/BIM-1015875
American Medical Association (AMA)
Xiong, H. H.& Zhu, C.& Zhao, X.& Wang, Z. Q.& Lin, H.. Rare Earth Doped Lanthanum Calcium Borate Polycrystalline Red Phosphors. Advances in Materials Science and Engineering. 2014. Vol. 2014, no. 2014, pp.1-7.
https://search.emarefa.net/detail/BIM-1015875
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1015875