Optoelectronic properties of Quantum Dots for biomedicine and energy-to-light conversion

Identifier:  TDX:2983

Handle: https://hdl.handle.net/20.500.11797/TDX2983

Authors:  Mirasol, Sofia Paulo

Abstract:
In the last decades, nanoscience has emerged as a novel technology due to its versatility to be employed in many research areas. One of the most promising nanomaterials, colloidal quantum dots have been deeply studied for their extraordinary optoelectronic properties and their versatility in order to use in different fields. The present thesis is focused on the synthesis of different quantum dots as well as their use in LEDs, perovskites solar cells and biosensors. Three different Quantum Dots have been synthetized: cadmium, perovskites and carbon based quantum dots. The first two material present a high quantum yield and narrow emission band. However, their high toxicity is an important drawback. In order to avoid the use of those material we synthetized carbon quantum dots. Their low toxicity and biocompatibility is a good alternative to heavy metal-containing nanomaterials. In addition, carbon based material can be prepared using ordinary products as glucose or sucrose and solved in non-chloro solvents such as ethanol or water. The work discussed in this thesis was carried out at Institute of Chemical Research of Catalonia (ICIQ) and Eurecat the technological center of Catalonia, between March 2015 and March 2019.