NOVELTY - The dial (1) is formed from a solar cell comprising a substrate (2), at least one multiplicity of superposed layers defining at least an n-i-p or a p-i-n element, and a conducting layer forming a first electrode (8) of minimum and maximum thickness 2-10 and 15-40 nm, respectively, intended to be exposed to light rays and comprising a transflective metal.    USE - Dial having a solar cell for feeding the circuit for a timepiece or the electrical circuit of a measuring device, for example.    ADVANTAGE - Maximum light transmission and minimum reflection of light incident on the conducting layer are obtained. The dial is bifunctional in that it also provides a source of electrical energy.    DETAILED DESCRIPTION - The light reflectivity of the first electrode (8) is 90-50% at a wavelength of 550 nm, preferably 85-60%.    The metal for the first electrode (8) is selected from gold, aluminum, silver, platinum, palladium, nickel, titanium, rhodium and copper.    Preferably, a coupling layer (12) and/or a diffusion barrier is interposed between the first electrode (8) and the p layer.    The element can be an n-i-p element (6: 6a, 6b, 6c), where the n layer is the nearest to the substrate (2), the substrate (2) can be a conductor forming a second electrode (10) of an n-i-p element (6: 6a, 6b, 6c), or it can be an insulator having a conducting layer forming a second electrode (10) between the substrate (2) and the n layer, and the first electrode (8) can be covered with a layer of protective lacquer.    Alternatively, the element can be a p-i-n element, where the p layer is the nearest to the substrate (2), and the substrate (2) is transparent and preferably made of glass.    The dial (1) has an opening (16) for a spindle for pointers.    The surface of the substrate (2) that carries the n-i-p or p-i-n element can be structured    DESCRIPTION OF DRAWING(S) - The drawing shows a longitudinal cross-section of an embodiment of the invention.    Dial (1)    Substrate (2)    n-i-p layers (6: 6a, 6b, 6c)    First electrode (8)    Second electrode (10)    Coupling layer (12)    Protective layer (14)    Opening (16)