Multicolor-tunable emissions of YOF: Ln3+/Yb3+ (Ln3+ = Ho3+, Er3+, Tm3+) nanophosphors. (August 2018)

• Record Type: Journal Article
• Authors: Periša, Jovana; Papan, Jelena; Dolić, Slobodan D.; Jovanović, Dragana J.; Dramićanin, Miroslav D.
• Is Part Of: Dyes and pigments. Volume 155(2018)
• Page Start: 233
• Page End: 240
• Publication Date: 2018-08
• Subjects: YOF -- Downshifting emission -- Upconversion -- CIE coordinate -- Color -- Lanthanides; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2018.03.047
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: Color tuning of down-shifting and up-conversion emissions of YOF:Ln 3+ /Yb 3+ (Ln 3+ = Ho 3+, Er 3+, Tm 3+ ) nanophosphors is demonstrated. Nanophosphors were prepared by the modified sol-gel Pechini method and characterized by the X-ray diffraction, transmission electron microscopy, and photoluminescence spectroscopy. Samples consist of 20 nm particles crystallized in the rhombohedral crystal structure. Depending on the Ln 3+ /Yb 3+ concentration ratio and the type of excitation (UV/VIS or NIR) color of the particle's emission varied from the blue to red. Commission Internationale de L'Eclairage chromaticity coordinates of emission colors are given for the range of Ln 3+ /Yb 3+ concentration ratios for both down-shifting and up-conversion luminescence. We showed that the emission color of these nanophosphors may be additional tuned by simultaneous excitation with UV-VIS and NIR radiation (in different proportion) which yields unique color labels for the anti-counterfeit and security applications. Graphical abstract: Highlights: YOF:Ln 3+ /Yb 3+ nanophosphors prepared by modified sol-gel Pechini method. The YOF:Ln 3+ /Yb 3+ nanophosphors exhibit various colors upon different excitation. The color is tuned from red to blue by changing the Y 3+ /Ln 3+ concentration ratio. YOF:Ln 3+ /Yb 3+ nanophosphors could find application in light display systems.