A watch includes a case, and a solar cell disposed inside the case and including a substrate made of resin and having a surface, a power generating unit having, at the surface, a first electrode, a first semiconductor layer, and a second electrode that are stacked in order, a first antenna including a third electrode that is provided at the surface and that is disposed at a position not to overlap the power generating unit in a plan view viewed in a direction orthogonal to the surface, and a protective layer disposed covering the power generating unit and the first antenna.

A photoelectric converter including a crystalline silicon substrate having a light receiving surface including a smooth section and a rough surface section having surface roughness greater than the surface roughness of the smooth section and a light transmissive inorganic film so provided as to overlap with the smooth section and the rough surface section, and the film thickness t1 of a portion of the inorganic film that is the portion where the inorganic film overlaps with the rough surface section is smaller than the film thickness t2 of a portion of the inorganic film that is the portion where the inorganic film overlaps with the smooth section. The arithmetic average roughness of the rough surface section is preferably greater than or equal to 0.1 μm.

A photoelectric converter including a crystalline silicon substrate having a light receiving surface including a smooth section and a rough surface section having surface roughness greater than the surface roughness of the smooth section and a light transmissive inorganic film so provided as to overlap with the smooth section and the rough surface section, and the film thickness t1 of a portion of the inorganic film that is the portion where the inorganic film overlaps with the rough surface section is smaller than the film thickness t2 of a portion of the inorganic film that is the portion where the inorganic film overlaps with the smooth section. The arithmetic average roughness of the rough surface section is preferably greater than or equal to 0.1 μm.

An electronic timepiece includes an exterior case; an electronic module housed in the exterior case; a winding stem projecting from the electronic module to the exterior case; and a conductive earth member having a plate-like portion and an elastic portion extending from the plate-like portion to a winding stem side, in which the winding stem has a flange disposed between the electronic module and the exterior case, and the elastic portion is brought into contact with a surface of the flange on an electronic module side in a state where the winding stem is pushed into the electronic module.

A movement includes a solar panel that has a substrate made of resin, and a support member that is made of resin, has a frame shape, and supports the substrate through bonding through a bonding layer.

A movement includes a solar panel that has a substrate made of resin, and a support member that is made of resin, has a frame shape, and supports the substrate through bonding through a bonding layer.

An electronic device includes: a date indicator that includes a letter part and a non-letter part different from the letter part, the non-letter part being a through hole; and a solar battery disposed below the date indicator.

An electronic device includes: a date indicator that includes a letter part and a non-letter part different from the letter part, the non-letter part being a through hole; and a solar battery disposed below the date indicator.

In a sensor used in an energy harvesting system, electric power generated by a solar cell module is more efficiently utilized. In a sensor (100), a resistor (3) is connected in parallel with one of a first solar cell module (1a) and a second solar cell module (1b) that have mutually different current-voltage characteristics in the same illuminance environment and in series with the other one of the first solar cell module (1a) and the second solar cell module (1b). A first voltmeter (4a) measures a voltage (V1) across the first solar cell module (1a), and a second voltmeter (4b) measures a voltage (V2) across the second solar cell module (1b). A load (6) is fed with the electric power generated by the first solar cell module (1a) and the second solar cell module (1b).

An electronic watch including a movement, and the movement includes a movement main body, a plate manufactured by a ferromagnetic metal, and a hook having flexibility, and the plate includes an engagement part that protrudes from the rear surface of the plate and which is configured to accommodate one end part of the hook, and the one end part of the hook is configured to be accommodated by the engagement part by elastically deforming the hook, and the other end part of the hook is fixed to the movement main body.