Implantable electrode coupled to an optoelectronic device

The present invention concerns an optoelectronic electrode element which is implantable in a human or animal body for placement on a biological tissue for electrically stimulating and/or sensing physiological parameters of said biological tissue and powered by a source of light energy, said optoelectronic electrode element comprising: (a) an electrode module (40) comprising at least a first and second electrodes (41, 42) each comprising an electrode surface (41s, 42s), (b) an optoelectronic module (20) comprising a photovoltaic cell (21 a) suitable for transforming optical energy into electrical energy, (c) a feeding fibre optic (31a), (d) a coupling module (10) comprising: * a circuit receiving portion (12) for inserting, positioning, and rigidly fixing the optoelectronic module (20) to the coupling module (10); * a feeding fibre cavity (11a) for inserting and coupling the feeding fibre optic to bring it in optimal optical communication with the photovoltaic cell; (e) wherein, the coupling module (10) is coupled directly to a fixing area of the electrode module (40), such that the photovoltaic cell be in electrical contact with the first and second electrodes (41, 42).