RESUMO
We here report the implementation of poly[(3-N-methylimidazoliumpropyl)methylsiloxane-co-dimethylsiloxane]iodides as suitable polymeric hosts for a novel class of in situ cross-linkable iodine/iodide-based gel-electrolytes for dye-sensitized solar cells. The polymers are first partially quaternized and then subjected to a thermal cross-linking which allows the formation of a 3D polymeric network which is accompanied by a dramatic enhancement of the ionic conductivity.
Assuntos
Reagentes de Ligações Cruzadas/química , Géis/química , Hidrocarbonetos Iodados/química , Siloxanas/química , Corantes/química , Condutividade Elétrica , Eletrólitos/química , Energia SolarRESUMO
Novel co-sensitizers have been structurally tailored and implemented in multi-sensitized devices demonstrating synergic efficiency enhancement attributable to improved light-harvesting as well as prevention of charge recombination.
Assuntos
Corantes/química , Fontes de Energia Elétrica , Engenharia , Energia Solar , Transporte de ElétronsRESUMO
Spin-coated films of 29H,31H-tetra-4-(2,4-di-tert-amylphenoxy)phthalocyanine (H(2)Pc) and [kappaP,mu-kappaS-(dppeS)Pt(CH(3))](2)[BF(4)](2) have been used as sensing layers deposited in thin film form for the detection of VOCs. The sensing behaviour of the blend was predicted on the basis of mass spectrometric determinations performed on H(2)Pc/Pt-complex solutions, by monitoring the formation of gas-phase ions at the electrospray interface. The addition of small amounts of acetonitrile produced a [M+41](+) peak whereas the addition of similar amounts of methanol, ethanol and isopropyl alcohol did not give the corresponding [M+ROH](+) species. These results were confirmed by sensing tests. A pure phthalocyanine optosensing element did not show relevant selectivity. Conversely, the heterogeneous sensing layer obtained by spin-coating deposition of a Pt-complex/H(2)Pc blend allowed the sensing of acetonitrile vapours with respect to the above mentioned alcohols.