Fast and simultaneous doping of Sr0.9−x−y−zCa0.1In2O4:(xEu3+, yTm3+, zTb3+) superstructure by ultrasonic spray pyrolysis

• Published in: Ultrasonics sonochemistry Vol. 56; pp. 14 - 24
• Main Authors: Santiago, A.A.G., Lovisa, L.X., Medeiros, P.N., Li, M.S., Carreño, N.L.V., Longo, E., Paskocimas, C.A., Bomio, M.R.D., Motta, F.V.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.09.2019
• Subjects: Europium; Photoluminescence; Strontium indate; Terbium; Thulium; Ultrasonic spray pyrolysis; Thulium; Terbium; Ultrasonic spray pyrolysis; Europium; Strontium indate; Photoluminescence
• ISSN: 1350-4177; 1873-2828
• DOI: 10.1016/j.ultsonch.2019.03.028

[Display omitted] •Sr0.9−x−y−zCa0.1In2O4:(xEu3+, yTm3+, zTb3+) were obtained quickly and continuous.•The relationship between the structural and photoluminescence changes were studied.•Sr0.9−x−y−zCa0.1In2O4:(xEu3+, yTm3+, zTb3+) exhibited emission in the white region. In the present work, Sr0.9−x−y−zCa0.1In2O4:(xEu3+, yTm3+, zTb3+) particles were synthesized by the ultrasonic spray pyrolysis (USP) method to obtain a single-phase white phosphorus formed by six different cations in solution within the lattice (superstructure). The samples were also structurally and morphologically characterized by X-ray diffraction (XRD) techniques and by field emission scanning electron microscopy (FE-SEM). The photoluminescent behavior and the characteristics of the emitted colors were studied by the variation in the co-doping of the rare earth elements. The Sr0.9Ca0.1In2O4 sample showed a near blue color emission, but all co-doped samples showed emission in white with very close chromaticity coordinates to the standard white (x = 0.33 and y = 0.33). The Tm3+ → Tb3+ (ET1), Tm3+ → Eu3+ (ET2) and Tb3+ → Eu3+ (ET3) Energy Transfers were proposed and are considered necessary for adjusting and controlling the desired color properties.