Synthesis and optical properties of CaMoO4:Eu3+, Na+ nanophosphors and a transparent CaMoO4:Eu3+, Na+ suspension

CaMoO4:Eu3+, Na+ nanophosphors were prepared from Ca-oleate (Eu, Na-oleate) and tetraoctylammonium (TOA)-MoO4 complexes by using a solvothermal reaction. The brightest red-emitting nanophosphor was Ca0.58MoO4:0.21Eu(3+), 0.21Na(+) prepared at 120 degrees C. The surfaces of the CaMoO4:Eu3+, Na+ nanophosphors were hydrophobic because of the use of oleylamine as surfactant. A stable scattering-free suspension of Ca0.58MoO4:0.21Eu(3+), 0.21Na(+) nanophosphor in toluene was also prepared for use in flexible and transparent displays. (C) 2012 Elsevier B.V. All rights reserved.