Efficient dual‐mode up‐conversion and down‐shifting emission in β‐NaYF4:Yb3+, Er3+ microcrystals via ion exchange. Issue 7 (10th April 2017)

• Record Type: Journal Article
• Authors: Fan, Shaohua; Wang, Shikai; Sun, Hongtao; Sun, Shiyu; Gao, Guojun; Hu, Lili
• Is Part Of: Journal of the American Ceramic Society. Volume 100:Issue 7(2017)
• Page Start: 3061
• Page End: 3069
• Publication Date: 2017-04-10
• Subjects: fluoride -- ion exchange -- lanthanide -- up‐conversion; Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.14872
• Languages: English
• ISSNs: 0002-7820

Abstract

Abstract: We report efficient dual‐mode up‐conversion (UC) and down‐shifting (DS) emission in a single Yb 3+ /Er 3+ ‐co‐doped β‐NaYF4 microcrystals with controlled morphology and size via a simple Na + ion‐exchange modification (IEM) method. IEM well preserves the crystal structure and monodispersed morphology of hydrothermal‐synthesized β‐NaYF4 . Meanwhile, IEM gives rise to the significant enhancement of UC emission intensity up to 3800 times and strongly enhanced DS emission intensity of Er 3+ and Yb 3+ by several times in β‐NaYF4 :Yb 3+, Er 3+ microcrystals. IEM also strongly prolongs the DS emission lifetimes of Er 3+ and Yb 3+ in visible and near‐infrared region. The enhanced UC and DS emission intensities and prolonged lifetimes in β‐NaYF4 :Yb 3+, Er 3+ are mainly ascribed to the dispersing of localized Yb 3+ and Er 3+ clusters during IEM.