A simple and convenient method has been developed for synthesis of water-soluble CdTe quantum dots （QDs） under ambient atmospheric conditions. In contrast to the traditional aqueous synthesis, green to red emitting CdTe QDs were prepared by using TeO2 to replace Te or AIzTe3 as tellurium source in this method. The influences of ex- perimental variables, including pH value, 3-mercaptopropionic acid （MPA）/Cd and Te/Cd molar ratios, on the emis- sion peak and photoluminescence （PL） quantum yield （QY） of the obtained CdTe QDs have been systematically investigated. Experimental results indicate that green to red emitting CdTe QDs with a maximum photolumines- cence quantum yield of 35.4% can be prepared at pH 11.3 and rt（Cd） ： n（Te） ： n（MPA）= 1 ： 0.1 ： 1.7.
ZDAMoO4：Eu3＋ red phosphors co-doped with Mg2＋ and Bi3＋ were synthesized using a solid-state reaction. X-ray powder diffraction, scanning electron microscopy, and photoluminescence analysis were used for characterizing the phosphors. The introduction of Mg2＋ into a Zn2＋ site further enhanced the emission intensity of the 5D0→VF2 transition since the asymmetry ofa Eu3＋ site increased when Zn2＋ was substituted by Mg2＋. The co-doped Bi3＋ efficiently sensitized the emission of Eu3＋ and effectively extended the absorption of near-ultraviolet light with wavelengths ranging from 300 to 370 nm. The high color purity of Mg0.10Zn0.84MoO4：Eu0.053＋,Bi0.013＋ was calculated to be 91.80%. The thermal quenching temperature Td was about 387 K and the activation energy for thermal quench- ing was found to be about 0.31 eV for Mg0.10Zn0.84MoO4.Eu0.053＋,Bi0.013＋, respectively. Moreover, the results revealed that the energy transfer was more effective when the Zn0.95MoO4：Eu0.053＋ phosphors were co-doped with Mg2＋ ions and Bi3＋ ions than those doped only with Mg2＋ ions.
