Infoscience

Journal article

A new method for manufacturing dye-sensitized solar cells on plastic substrates

A new method for the prepn. of nanostructured TiO2 films, based on the compression of a TiO2 powder is presented, and its relevance for the prodn. of dye-sensitized solar cells is discussed. By applying a pressure (>200 kg cm-2) on a film of TiO2 powder, a mech. stable nanostructured film is formed, which is suitable as substrate for dye-sensitized solar cells without the necessity of a high temp. sintering step. Using Degussa P25 TiO2 powder, the so called N719 dye, I-/I3- in 3-methoxypropionitrile as redox electrolyte, and thermally platinized conducting glass as counter-electrode, we have achieved an overall efficiency of 4.5 ± 0.3% for solar cells using conducting glass and 4.0 ± 0.5% for cells using conducting plastic. In both cases no high temp. step was applied. The new method allows for a high throughput, continuous roll-to-roll prodn. process, where a roller mill is used for the compression step. Currently, interconnected modules and monolithic cells prepd. with the press technique are being studied.

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