Investigation on the Structure and Optical Properties of Fe2+:ZnSe Quantum Dots Synthesized by Microemulsion Method

Abstract

ZnSe quantum dots (QDs) have intensively studied because of their unique optical properties and enormous applications. By doping transition metal ions in ZnSe QDs, their properties can be further optimized and new functions can be given. In this work, Fe²⁺ doped ZnSe QDs were successfully prepared using inverse microemulsion-assisted hydrothermal method, and advanced characterization methods were used to systematically study their structure and optical properties. The research results showed that Fe²⁺ was successfully doped into the ZnSe lattice, and with the increase of Fe²⁺ doping concentration, the particle size of QDs gradually decreased. The actual doping ratio of Fe²⁺ was about 41% of the initial concentration. Optical properties studies showed that Fe²⁺ doping reduced the band gap width of ZnSe QDs from 2.43 eV to 1.96 eV. The synthesis of Fe²⁺ doped ZnSe QDs provides new possibilities for its application in optoelectronic devices and photocatalysis.