Synthesis of Photoactive Dendrimers for Green Photovoltaics

• Autor(a) principal: Pires, Rita Figueiredo
• Data de Publicação: 2015
• Tipo de documento: Dissertação
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10362/19893
• topic: Supercritical carbon dioxide; Photoactive dendrimers; Artificial Leaf; OPV cell; Organic electronics; Domínio/Área Científica::Engenharia e Tecnologia::Engenharia Química

This master thesis was focused on synthesis and characterization of active components for the fabrication of hydrogel-based organic solar cells (artificial leaves). The synthesis of a complex photoactive dendrimer and a novel ruthenium sensitizer and the synthesis of a “clickable” β-cyclodextrin were successfully achieved. This “nanovelcro” will be a crucial component of the final photoactive dendrimer unit, and will be used in forthcoming work. Preliminary fluorescence and cyclic voltammetry studies were performed for photoactive species, PIMAM-OMeG1 and Ru(dcbpy)2(NCS)(EAFc), with very promising results. PIMAM-OMeG1 has shown the capacity of absorbs and emits light and both species have a redox potential. Due to the low solubility of photoactive dendrimers in organic solvents and water, PIMAM-OMeG1 suffered several transformations for improving its solubility. Therefore, the final devices were constructed using an ion gel as matrix, instead of a hydrogel.