Reddish-orange-emitting Ca12Al14O33: Sm3+ phosphors with high color purity
Samarium (Sm)-doped Ca 12 Al 14 O 33 (CAO) phosphors were synthesized using solid-state reaction method. Crystal structure of Sm 3+ -doped CAO was investigated using X-ray diffraction and Raman spectroscopy analysis. Raman active peaks at 320 cm −1 , 512 cm −1 and 754 cm −1 and 773 cm −1 were attrib...
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Published in | Chemical papers Vol. 76; no. 2; pp. 1147 - 1155 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Warsaw
Versita
01.02.2022
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | Samarium (Sm)-doped Ca
12
Al
14
O
33
(CAO) phosphors were synthesized using solid-state reaction method. Crystal structure of Sm
3+
-doped CAO was investigated using X-ray diffraction and Raman spectroscopy analysis. Raman active peaks at 320 cm
−1
, 512 cm
−1
and 754 cm
−1
and 773 cm
−1
were attributed to Ca–O, vibration between Al–O–Al, and ν3 mode of AlO
4
5−
groups, respectively. The optical band-gap for pure and Sm
3+
ion-doped CAO was calculated to be 4.55 eV and 4.50 eV, respectively. Field emission scanning electron microscope (FESEM) image of synthesized phosphors exhibited agglomerated coin-like structure spread with voids. Luminescence properties were analyzed by photoluminescence (PL) spectra. The emission of reddish-orange light due to transition of
4
G
5/2
-
6
H
7/2
was observed, which was confirmed by the Commission Internationale de l’Eclairage (CIE) chromatic coordinate graph. The maximum intensity of orange-red light was observed in 0.5% Sm
3+
-doped CAO, and the calculated color purity was 95.2%. |
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ISSN: | 0366-6352 1336-9075 2585-7290 |
DOI: | 10.1007/s11696-021-01915-1 |