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- W3104511791 abstract "Abstract The series of Tm-doped phosphates Ca9-xZnxLa0.9(PO4)7:0.1Tm3+ for phosphor-convertible white LEDs (pc-WLED) with β-Ca3(PO4)2-type structure were synthesized using a standard high temperature route. Intense blue emission in the visible spectrum was observed due to 4f-4f transitions in the Tm3+ ion. The phosphates have been characterized by powder X-ray diffraction (PXRD), second harmonic generation (SHG), and luminescence spectroscopy. These phosphors show a satisfactory blue performance due to the 1D2 – 3F4 (≈ 450 nm) transition of Tm3+ excited by near-UV light (358 nm). The crystal structure transforms R3c → R 3 ¯ c upon Ca2+ → Zn2+ substitution, and it leads to growing of the integral intensity in 4 times compared with unsubstituted phosphate. Rising of color purity peaking at x = 1 was also observed. The obtained characteristics are superior to than that for the commercial blue phosphor BaMgAl10O17:Eu2+. Generally, Ca9-xZnxLa(PO4)7:Tm3+ phosphates are a new kind of potential blue emitting phosphors for white light-emitting diodes." @default.
- W3104511791 created "2020-11-23" @default.
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- W3104511791 date "2021-02-01" @default.
- W3104511791 modified "2023-09-27" @default.
- W3104511791 title "A novel high color purity blue-emitting Tm3+-doped β-Ca3(PO4)2-type phosphor for WLED application" @default.
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- W3104511791 doi "https://doi.org/10.1016/j.ijleo.2020.166027" @default.
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