Ecole Polytechnique Federale De Lausanne

Ecole Polytechnique Féderale De Lausanne (epfl)

Fabrizio Giordano

Michael Graetzel

Shaik Mohammed Zakeeruddin

Mohammad Khaja Nazeeruddin

Shaik Mohammad Zakeeruddin

Florian Kessler

Michael Grätzel

Etienne Baranoff

Anders Hagfeldt

Julian Burschka

Chenyi Yi

Marina Freitag

Norman Pellet

A photovoltaic system including a solar cell having a hysteretic behavior; and a power device configured to extract a maximum power from the solar cell by forcing power oscillations of the power output by the solar cell.

Device and method for performing maximum power point tracking for photovoltaic devices in presence of hysteresis

The invention relates to electrochemical devices comprising complexes of cobalt comprising at least one ligand with a 5- or six membered, N-containing heteroring. The complex are useful as p- and n-dopants, as over of electrochemical devices, in particular in organic semiconductors. The complexes are further useful as over-discharge prevention and overvoltage protection agents.

Metal complexes for use as dopants and other uses

The present invention relates to compounds of formula (I) based on a porphyrin core and a &#x3c0;-conjugated linker or acceptor introduced between the porphyrin core and an anchoring group having a high absorption coefficient covering the whole UV-Visible and near-infrared spectral response, and their use as sensitizer or dye and an electrochemical or optoelectronic device including a compound of the invention.

Porphyrin based sensitizer for dye-sensitized solar cell

Growing community of inventors

St-Sulpice, Switzerland

Fabrizio Giordano