Universitaet Stuttgart

Solarzentrum Stuttgart Gmbh

Universitãt Stuttgart

Enbw Energie Baden-wurttemberg Ag

Juergen H Werner

Markus Schubert

Ahmed Garamoun

Christian Saemann

Juergen Koehler

Liviu-Mihai Stoicescu

Michael Reuter

Morris Dahlinger

Kai Carstens

Sebastian Eisele

Christian Sämann

Tobias Roeder

A method is disclosed for producing a battery preparing a first electrode by providing a substrate and depositing onto the substrate at least one silicon-based semiconductor layer of a specific porosity, in particular a doped micro-crystalline silicon layer that may comprise additions of Ge, Sn and/or C; treating the semiconductor layer using laser radiation for fully or partially varying the porosity, in particular by increasing the porosity of active regions for accommodating ions, in particular lithium-ions, or for reducing the porosity of inactive regions, for decreasing the ion-absorption capacity; arranging the first electrode together with a second electrode and an electrolyte within a housing; and contacting the two electrodes and connecting with external terminals accessible from outside the housing. Also disclosed is a battery made according to the disclosed method.

Battery and method for producing a battery

A method and an apparatus for testing photovoltaic modules are provided, wherein power that a photovoltaic module outputs or draws is modulated a modulating frequency, the photovoltaic module is scanned using a camera and the camera signal generated by the camera is evaluated in order to obtain a luminescence image of the photovoltaic module which is used for detecting defects on the photovoltaic module. The photovoltaic module is operated only in the forward direction and the camera signal is evaluated using a digital filter, such as a lock-in filter.

Method and apparatus for testing photovoltaic modules

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Stuttgart, Germany

Juergen H Werner