Discovering how to efficiently convert solar energy into electrical/chemical energy is one of humanity's greatest challenges in the 21st century. Among innovative photovoltaic approaches, quantum dots (QDs) solar cells (SC) have exhibited a rapid increase in energy conversion efficiency (ECE) and they are promising devices for their low-cost, theoretically predicted high efficiency, and large-scale solar energy conversion as an alternative to conventional solid-state semiconductor SC. Our most recent advances have demonstrateddynamics of semiconducting nanocrystals uptake into mesoporous TiO2 thick films through electrophoretic deposition.My current focus is to extend this project toward (i) investigating the injection properties in various oxide/QD systems; (ii) tailoring the electronic band structure of the complex system to maximize exciton separation, charge injection and transport; (iii) increasing significantly the ECE in SC.