Photovoltaic cell having a colored appearance, particularly for a watch dial

The present invention concerns a photovoltaic cell, also called a solar cell, which can be used to form a dial for a watch or another electronic apparatus and to provide the watch or apparatus with electric power. There is described a colored photovoltaic cell () with a semiconductor, preferably silicon, which has high efficiency and a pleasing colored appearance, allowing it to be used as a dial for a watch or another electronic apparatus powered by the cell. The cell includes a reflective metal substrate () serving as the bottom electrode, a stack of hydrogenated amorphous silicon layers forming p-i-n junctions (), and a transparent top electrode (). The latter may be coated with a layer () of slightly diffusing lacquer, which may be colorless or colored. The respective thicknesses eof the top electrode and eof the silicon are combined as a function of the refractive indices of the materials so as to produce an interferential reflection in a predetermined reflection spectrum.