Siemens Aktiengesellschaft

Matthias Moeller

Helmold Kausche

Franz Fischer

A solar cell comprises a semiconductor body formed of amorphous silicon and has a layer sequence formed of a p-type SiC layer, an intrinsic layer (i), and an n-type layer (n). In order to improve stability behavior, the pin solar cell has a transparent base electrode formed of stannic oxide, and has a phosphorus doping profile in the intrinsic layer i which rises in direction toward an i/n junction. It is irradiated from the p-side of the layer sequence.

Solar cell comprising a semiconductor body formed of amorphous silicon

A method for manufacturing finger type electrode structures which form electric contacts at solar cells consisting of amorphous silicon. The substrate is first coated with a chromium-nickel layer and then a substantially pure nickel layer. After immersion in a mildly activated fluxing agent, a tin alloy layer is applied by dipping. The method enables the manufacture of very low resistance contact fingers at a p-i-n type solar cell provided with an ITO (In/Sn/oxide) layer.

Method for manufacturing finger electrode structures forming electric

Solar cells having a semiconductor body composed of amorphous silicon which is deposited on a substrate coated with aluminum at least on one of its surfaces, with a diffusion barrier layer composed of titanium nitride positioned between the aluminum layer and the semiconductor body. The aluminum layer and the titanium nitride layer can be produced by high frequency sputtering while the semiconductor body can be produced by a glow discharge deposition.

Amorphous silicon solar cells and a method of producing the same

Solar cells having a semiconductor body composed of amorphous silicon which is applied to a substrate coated at least at one surface thereof with aluminum, functioning as a back contact. Recrystallization is prevented by alloying silicon or silicon/titanium into the aluminum layer so that the amounts of silicon within the alloy is, in preferred embodiments, about 1.3% by weight and, with the presence of 0.1% by weight titanium, is at about 1.2% by weight.

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Munich, Germany

Matthias Moeller