Poster presented at EURASIA 2018 (Rome) The synthesis of colloidal photo-luminescent semiconductor quantum dots (QDs), belonging to II-VI groups, even from single source precursors is presented. Since three decades their synthesis has been pursued implementing new and easier synthetic conditions that standardize their production. In this work is reported the production of luminescent of CdS QDs in a polymeric film induced by laser processing. A film of PMMA doped with two types of precursors of cadmium carboxylate and tellurium phosphinate is deposited as a thin film to observe the formation of CdTe QDs. The CdTe formation is observed after thermal annealing for different time by means of UV-Vis and photoluminescence spectroscopy. The optical analysis showed the formation of CdTe QDs with size between 3 – 4 nm and with an emission photoluminescence included in the 540 650 nm region. These results pave the way for patterning of QDs by inducing thermal annealing in selected areas of the film.