Abstract: The present invention relates to the use as a sensitive material in a thin layer for bolometric detection of infrared radiation, of a material having a spinel ferrite structure of chemical composition, ignoring doping agents if any are present, satisfying empirical formula I: Fe3-(x+y)MxAyO4+?. The invention also provides a bolometric device for detecting infrared radiation or for infrared imaging, and including at least one sensor provided with a sensitive element in the form of a thin layer as defined above.

Abstract: An elementary device to generate electric energy including a photovoltaic converter and a thermoelectric converter. The photovoltaic converter includes a stack of layers, resting on a supporting substrate in heat-insulating material, including a first conductive layer as an upper electrode, and a second conductive layer as a lower electrode, the upper and lower electrodes sandwiching a layer in photoactive material between them. The thermoelectric converter includes a third conductive layer acting as a hot junction and a fourth conductive layer acting as a cold junction, the hot and cold junctions sandwiching between them an element in thermoelectric and electrically conductive material. The thermoelectric and electrically conductive element is included in the thickness of the supporting substrate, so that one end is in contact with the hot junction and the other end is in contact with the cold junction.

Abstract: The present invention relates to the use as a sensitive material in a thin layer for bolometric detection of infrared radiation, of a material having a spinel ferrite structure of chemical composition, ignoring doping agents if any are present, satisfying empirical formula I: Fe3?(x+y)MxAyO4+???(I) The invention also provides a bolometric device for detecting infrared radiation or for infrared imaging, and including at least one sensor provided with a sensitive element in the form of a thin layer as defined above.