A Novel One-Step Synthesis of Highly Fluorescent CdSe QD's of Tunable Light Emission by Aqueous Route

摘要

In this study, we have developed a novel route to synthesize 3-MPA capped CdSe quantum dots (QD's) of controllable size by a facile aqueous route using least hazard chemicals. Selenium sources like Se powder, Na_2Se which are hazardous, expensive and unstable have been replaced by water soluble selenium dioxide for the synthesis of CdSe QD's. These QD's have been characterized by XRD, UV-vis absorption and photoluminescence (PL) measurements. Small particle sizes in the range 1.7 - 2.6 nm are synthesized that emit green, bright yellow and orange colors. The XRD results indicated that as synthesized CdSe QDs has a pure Zinc blende structure.