Effects of varying Sm3+ concentration on the structure, morphology and photoluminescence properties of the BaAl2O4 /CaAl2O4/Ca4Al6O13/Ca3Al2O6:x% Sm3+ (0 ≤ x ≤ 1.9) mixed phases using citrate sol-gel method. Issue 12 (December 2022)

• Record Type: Journal Article
• Authors: Bele, A.; Mhlongo, M.R.; Koao, L.F.; Motaung, T.E.; Malevu, T.D.; Hlatshwayo, T.T.; Mpelane, S.; Mlambo, M.; Motloung, S.V.
• Is Part Of: Heliyon. Volume 8:Issue 12(2022)
• Publication Date: 2022-12
• Subjects: Citrate sol-gel -- Mixed phases -- Luminescence -- Sm3+; Research -- Periodicals; Medical sciences -- Periodicals; Natural history -- Periodicals; Social sciences -- Periodicals; Earth sciences -- Periodicals; Physical sciences -- Periodicals; 507.2
• DOI: 10.1016/j.heliyon.2022.e12573
• Languages: English
• ISSNs: 2405-8440

Abstract

Abstract: BaAl2 O4 /CaAl2 O4 /Ca4 Al6 O13 /Ca3 Al2 O6 :x% Sm 3+ (0 ≤ x ≤ 1.9) (hereafter called BCCC:x% Sm 3+ ) nanophosphors were successfully prepared by citrate sol-gel method. The structure, morphology and photoluminescence properties of the prepared nanophosphors were investigated. X-ray diffraction (XRD) indicated that the nanophosphors composed of the mixed phases of the hexagonal (CaAl2 O4, BaAl2 O4 ) and cubic (Ca4 Al6 O13, Ca3 Al2 O6 ) crystal structures. Scanning electron microscopy (SEM) revealed that doping influences the morphology of the prepared nanophosphor. High resolution transmission electron microscopy (HR-TEM) confirmed that the prepared phosphor particles are in the nanoscale range. Photoluminescence (PL) results showed emission peaks originating from the intrinsic defects within the BaAl2 O4, CaAl2 O4 and Sm 3+ transitions. The optimum luminescence intensity was found at 0.7% Sm 3+ . Commission Internationale de l'éclairage (CIE) shows that the Sm 3+ doped samples emitted the orange colour. Abstract : Citrate sol-gel; Mixed phases; Luminescence; Sm3 + .