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 inChemical papers Vol. 76; no. 2; pp. 1147 - 1155
Main Authors Kumar, K. Ganesh, Bhargav, P. Balaji, Aravinth, K., Arumugam, Raja, Ramasamy, P., Pathi, Prathap
Format Journal Article
LanguageEnglish
Published Warsaw Versita 01.02.2022
Springer Nature B.V
Subjects
Biochemistry
Biotechnology
Calcium aluminate
Chemical synthesis
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Color
Crystal structure
Emission analysis
Emission spectra
Field emission microscopy
Industrial Chemistry/Chemical Engineering
Luminescence
Luminous intensity
Materials Science
Mathematical analysis
Medicinal Chemistry
Optical properties
Original Paper
Phosphors
Photoluminescence
Purity
Raman spectroscopy
Samarium
Spectrum analysis
FESEM
Photoluminescence
X-ray diffraction
Band-gap
Commission Internationale de l’Eclairage
Al
Ca
O
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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%.
ISSN:0366-6352
1336-9075
2585-7290
DOI:10.1007/s11696-021-01915-1