NOVELTY - The device (1) has a photoconversion element (10) comprising a organic photoconversion layer, a first grating structure (20) arranged on a first side of the photoconversion element, and a second grating structure (30) arranged on a second side of the photoconversion element. The first grating structure directs a near-infra-red light portion of light incident on it into the photoconversion element. The second grating structure reflects a part of the near-infra-red light portion back into the photoconversion element and passes visible light out of the device.    USE - Photoelectric conversion device for use in light harvesting photovoltaic devices for generating electrical current.    ADVANTAGE - The device has the first and second grating structures to improve the near-infra-red photoconversion efficiency and the visible throughput of the device. The device has a wave guiding foil arranged to guide the reflected visible light, and the gratings arranged and optimized to direct near infrared light onto the photoconversion elements and to transmit visible light, so that the reflecting first grating structure and the waveguide properties of the wave guiding foil are combined to achieve wide design flexibility and high visible transmission of the device. The device comprises the first and second grating structures arranged adjacent to the organic photoconversion element to carry out a color correction of the appearance of the device due to the partial absorption of a part of the visible spectrum by the photoconversion element.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for method of generating electrical current.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a photoelectric conversion device comprising a first grating structure to correct color and a second grating structure for the internal reflection of near-infra-red light into the photoconversion element.    Photoelectric conversion device (1)    Photoconversion element (10)    Grating structures (20, 30)    Wave guiding foil (40)    Substrate layer (50)