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High efficiency dye-sensitized nanocrystalline solar cells based on sputter deposited Ti oxide films

2000; Elsevier BV; Volume: 64; Issue: 4 Linguagem: Inglês

10.1016/s0927-0248(00)00231-2

1879-3398

Mónica M. Gómez, Jun Lu, Eva Olsson, A. Hagfeldt, C.G. Granqvist,

Quantum Dots Synthesis And Properties

Nanocrystalline solar cells were made by incorporation of cis-dithiocyanato-bis(2,2′-bipyridyl-4,4′-dicarboxylate) ruthenium (II) into sputter deposited titanium oxide films. After a pyridine treatment, it was possible to achieve a photoelectric conversion efficiency as high as 7% for a solar intensity of 100W/m2 – almost the same as for conventional nanocrystalline cells with colloidally prepared titanium oxide. Transmission electron microscopy indicated a parallel penniform microstructure, and secondary ion mass spectroscopy showed that the dye incorporation was uniform except in the bottom parts of the sputtered films where a decreased porosity seems to limit the penetration of the dye.