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

作者：Cho Kyoungwon; Choi Jaeha; Kim Kang Min; Lee Jung Il; Ryu Jeong Ho^*

来源：Ceramics International, 2015, 41: S668-S674.

DOI：10.1016/j.ceramint.2015.03.152

• Powders: solid state reaction
• Cool/warm white
• NaLa(MoO4)(2):Ho3+/Tm3+/Yb3+
• Upconversion luminescence

The polycrystalline Ho3+/Tm3+/Yb3+ tri-doped NaLa(MoO4)(2) phosphors were successfully synthesized by the simple solid-state reaction method. Under the laser excitation of a 980 nm, Ho3+/Tm3+/Yb3+ 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 Tm3+, green and red emissions at 540 nm and 651 nm from Ho3+. The coordinates of Ho3+/Tm3+/Yb3+ 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 Ho3+ and Tm3+ concentrations. The luminescent properties on Tm3+ and Ho3+ concentrations and UC mechanism based on laser pump power were discussed in detail.

• 出版日期2015-11