摘要
Bright Cu-doped ternary ZnCdS quantum dots （ZnCdS：Cu QDs） with varied Cd concentrations were synthesized in aqueous solution by using a convenient microwave method.These ternary QDs could be directly dispersed in water solution.By regulating the Cd2＋ concentration from 0 to 50% （mole fraction of the cations）,the photoluminescence excitation （PLE） peak of such ZnCdS：Cu QDs could be continuously redshifted from 320 nm to 380 nm,while their photoluminescence （PL） peak was redshifted from 490 nm to 580 nm,exhibiting multicolor Cu-related emissions.Furthermore,the quantum yield of the ZnCdS：Cu QDs could reach as high as 12% by regulating the Cu doping concentration.These ZnCdS：Cu ternary QDs with kind surface conditions and good composition-controllable optical properties may have potential application in many areas such as sensing,bioimaging,and light-emitting diodes.
Bright Cu-doped ternary ZnCdS quantum dots （ZnCdS：Cu QDs） with varied Cd concentrations were synthesized in aqueous solution by using a convenient microwave method.These ternary QDs could be directly dispersed in water solution.By regulating the Cd2＋ concentration from 0 to 50% （mole fraction of the cations）,the photoluminescence excitation （PLE） peak of such ZnCdS：Cu QDs could be continuously redshifted from 320 nm to 380 nm,while their photoluminescence （PL） peak was redshifted from 490 nm to 580 nm,exhibiting multicolor Cu-related emissions.Furthermore,the quantum yield of the ZnCdS：Cu QDs could reach as high as 12% by regulating the Cu doping concentration.These ZnCdS：Cu ternary QDs with kind surface conditions and good composition-controllable optical properties may have potential application in many areas such as sensing,bioimaging,and light-emitting diodes.
基金
Supported by the National Natural Science Foundation of China (10904119)
