Abnormal broadband photoluminescence from Yb3+/Mn2+ codoped barium octaborate

• Published in: Journal of alloys and compounds Vol. 587; pp. 177 - 182
• Main Authors: Xiao, F., Song, E.H., Ye, S., Zhang, Q.Y.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 25.02.2014; Elsevier
• Subjects: Alloys; Bands; Broadband; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cooperative sensitization; Exact sciences and technology; Exchange interaction; Excitation; Gaussian; Illumination; Luminescence; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Phosphor; Photoluminescence; Physics; Upconversion; Upconversion luminescence; Upconversion luminescence; Exchange interaction; Cooperative sensitization; Phosphor; Photoluminescence; Manganese additions; Impurity pair; Near infrared radiation; Ultraviolet radiation; Ytterbium additions; Wide band; Phosphors; Barium Borates; Codoping; Exchange interactions
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2013.10.177

Concentration-dependent anomalous broadband down- and upconversion luminescence in Yb3+/Mn2+ codoped barium octaborate have been demonstrated. •Pure phase BaB8O13:Yb3+, Mn2+ phosphor was prepared by solid state reaction.•Concentration-dependent downconversion luminescence of BaB8O13:Mn2+ were studied.•An unusual broadband upconversion luminescence was obtained in BaB8O13:Yb3+, Mn2+.•The mechanism of cooperative sensitization luminescence was proposed. Concentration-dependent anomalous broadband down- and upconversion luminescence of Yb3+/Mn2+ codoped barium octaborate have been demonstrated. Upon ultraviolet (UV) excitation, dual Gaussian emission bands depend on the Mn2+ concentration located at 550 and 656nm were respectively ascribed to the Mn2+ pairs and single Mn2+ ion. Moreover, abnormal broadband upconversion luminescence at room temperature in BaB8O13:Yb3+, Mn2+ under near-infrared (NIR) excitation of Yb3+ at 976nm was demonstrated by the cooperative sensitization luminescence process. The experimental results could provide new insights into developing lighting and display systems, and biomedical imaging.