Highly efficient and transparent multicomponent catalysts for Dye Solar Cells (DSCs) were obtained by simultaneous electrodeposition of platinum and cobalt-sulfide (Pt:CoS) on conducting glass substrates from a mixture solution of both precursors. At equal charge transfer resistances (RCT), the superior transparency of electrodeposited (ED) Pt:CoS compared to ED Pt-only and ED CoS-only was attributed to the synergic combination of a very thin CoS layer and a fine dispersion of Pt nanoparticles. The highly catalytic properties of Pt:CoS with less electrodeposited material consumption, carried out at room temperature, can represent a fast and energy saving fabrication process, also compatible with flexible plastic substrates. In fact, DSCs with the ED Pt:CoS counterelectrodes showed the highest power conversion efficiency in back illumination, which is the configuration used for flexible metallic and bifacial DSCs during operation, gaining on average almost 14% and 7% in device efficiency with respect to ED CoS-only and ED Pt-only based cells. These results are important for all applications where transparency represents a key factor (e.g. BIPV, metal based devices) and may also point at blending different precursor solutions as a more general route for electrodeposition of layers with added functionality.
De Rossi, F., DI GASPARE, L., Reale, A., Di Carlo, A., Brown, T.M. (2013). Blending CoS and Pt for amelioration of electrodeposited transparent counterelectrodes and the efficiency of back-illuminated dye solar cells. JOURNAL OF MATERIALS CHEMISTRY. A, 41(7), 12941-12947 [10.1039/c3ta13076b].
Blending CoS and Pt for amelioration of electrodeposited transparent counterelectrodes and the efficiency of back-illuminated dye solar cells
DI GASPARE, LUCIANA;
2013-01-01
Abstract
Highly efficient and transparent multicomponent catalysts for Dye Solar Cells (DSCs) were obtained by simultaneous electrodeposition of platinum and cobalt-sulfide (Pt:CoS) on conducting glass substrates from a mixture solution of both precursors. At equal charge transfer resistances (RCT), the superior transparency of electrodeposited (ED) Pt:CoS compared to ED Pt-only and ED CoS-only was attributed to the synergic combination of a very thin CoS layer and a fine dispersion of Pt nanoparticles. The highly catalytic properties of Pt:CoS with less electrodeposited material consumption, carried out at room temperature, can represent a fast and energy saving fabrication process, also compatible with flexible plastic substrates. In fact, DSCs with the ED Pt:CoS counterelectrodes showed the highest power conversion efficiency in back illumination, which is the configuration used for flexible metallic and bifacial DSCs during operation, gaining on average almost 14% and 7% in device efficiency with respect to ED CoS-only and ED Pt-only based cells. These results are important for all applications where transparency represents a key factor (e.g. BIPV, metal based devices) and may also point at blending different precursor solutions as a more general route for electrodeposition of layers with added functionality.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
