Upconversion luminescence of Ho3+/Tm3+/Yb3+ tri-doped NaLa(MoO4)2 phosphors. (July 2015)

• Record Type: Journal Article
• Authors: Cho, Kyoungwon; Choi, Jaeha; Kim, Kang Min; Lee, Jung-Il; Ryu, Jeong Ho
• Is Part Of: Ceramics international. Volume 41(2015)Supplement 1
• Page Start: S668
• Page End: S674
• Publication Date: 2015-07
• Subjects: A. Powders: solid state reaction -- Cool/warm white -- NaLa(MoO4)2:Ho3+/Tm3+/Yb3+ -- Upconversion luminescence; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2015.03.152
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The polycrystalline Ho 3+ /Tm 3+ /Yb 3+ tri-doped NaLa(MoO4 )2 phosphors were successfully synthesized by the simple solid-state reaction method. Under the laser excitation of a 980 nm, Ho 3+ /Tm 3+ /Yb 3+ tri-doped NaLa(MoO4 )2 showed bright white upconversion (UC) emission visible to the naked eyes, which composes of blue emission at 475 nm from Tm 3+, green and red emissions at 540 nm and 651 nm from Ho 3+ . The coordinates of Ho 3+ /Tm 3+ /Yb 3+ co-doped NaLa(MoO4 )2 in the commission international de׳eclairage (CIE) chromaticity diagram could be controlled from cool to warm white color depending on Ho 3+ and Tm 3+ concentrations. The luminescent properties on Tm 3+ and Ho 3+ concentrations and UC mechanism based on laser pump power were discussed in detail.