Composition tuning bandgap of CdSxSe1-x colloidal semiconductor Quantum dots

Colloid chemistry method was used to to synthesis CdSxSe1-x quantum dots with different contents. The results show that the synthesized QDs is zinc blende structure, the particle size is about 3~4 nm in diameter, the band gap was tuned from 1.72 to 2.42 eV by increasing the content of S.