Preparation, Growth Mechanism, Upconversion, and Near-Infrared Photoluminescence Properties of Convex-Lens-like NaYF4 Microcrystals Doped with Various Rare Earth Ions Excited at 808 nm

• DOI: 10.1021/acs.cgd.7b01667
• Publication Date: 2018-02-01T17:33:39Z
• Authors: Yingjin Ma; Zhengwen Yang; Hailu Zhang; Jianbei Qiu; Zhiguo Song
• Keywords: Photon Upconversion

Preparation of rare earth ions doped photoluminescence materials with controlled morphology was desired to fulfill the requirement different applications. In work, convex-lens-like NaYF4 microcrystals various were prepared by adjusting preparation parameters including reaction time, temperature, NaOH concentration, ratio oleic acid 1-octadecene, and types doping ions. A possible growth mechanism is proposed based on time temperature-dependent evolution. The formation micro-convex-lens includes three processes nanoparticles self-assemble, dissolution–nucleation, regrowth. Doping dependent near-infrared upconversion luminescence properties investigated excited at 808 nm. visible observed in Er3+, Yb3+/Er3+, Nd3+/Er3+, Nd3+/Yb3+/Er3+ microcrystals, obtained Nd3+, Nd3+/Yb3+, microcrystals. exhibit mechanisms. energy transfer Er3+ → Yb3+ Nd3+ Yb3+/Er3+ Nd3+/Er3+ respectively. emission from mechanisms Er3+.