synthesis and optical study of cdznte quantum dots

the comparison of growth processes and fluorescent properties of cdznte semiconductor quantum dots that are synthesized in different concentrations of zn2+ in water are discussed in this paper. the samples are characterized through absorbtion (uv) and photoluminescence spectra (pl). the results show that when the reaction time is prolonged, the absorption peak and fluorescent emission peak present obvious red shifts and the diameters of the quantum dots continuously increase. under the best reaction conditions, the highest quantum yield can be attained by using thioglycollic acid (tga) as modifier when the reaction time is 300 min.