Power generating device and power generating module

1. A power generating module comprising:

a power generating device, including:

a photoelectric converter having a photoelectric conversion film,

an electret power generator formed of a light transmissive material and having an electret layer for holding electric charges, and

an insulating layer which is covering the photoelectric conversion film and transmits light in all wavelength bands available for the photoelectric conversion film or some of the all wavelength bands, the electret layer being stacked on the insulating layer;

a first DC-to-DC converter configured to convert a direct-current voltage output from the photoelectric converter included in the power generating device into another direct-current voltage;

a rectifier circuit configured to convert alternating-current power generated by the electret power generator included in the power generating device into direct-current power;

a second DC-to-DC converter configured to convert a direct-current voltage output from the rectifier circuit into another direct-current voltage; and

a power storage element connected to an output of the first DC-to-DC converter and an output of the second DC-to-DC converter.

2. The power generating module according to claim 1 , wherein

the electret power generator includes:

a light-transmissive movable substrate;

a first transparent electrode disposed on the electret layer; and

a second transparent electrode disposed on the light-transmissive movable substrate.

3. The power generating module according to claim 1 , wherein

the electret power generator includes:

a light-transmissive movable substrate; and

a first transparent electrode and a second transparent electrode which are disposed on the light-transmissive movable substrate.

4. The power generating module according to claim 1 , wherein

the electret power generator is formed of polycarbonate, polypropylene, polytetrafluroethylene, amorphous fluoro resin, or silicon dioxide.

5. The power generating module according to claim 1 , wherein

the electret layer is formed of polycarbonate, polypropylene, polytetrafluroethylene, amorphous fluoro resin, or silicon dioxide.

6. The power generating module according to claim 1 , wherein

a density of surface charges, regardless of positive or negative, of the electret layer is 1.0×10 11 cm −2 or greater.

7. The power generating module according to claim 2 , wherein

the light-transmissive movable substrate is connected to a support via a spring, and

the spring is formed of polycarbonate, polypropylene, polytetrafluroethylene, or amorphous fluoro resin.

8. The power generating module according to claim 1 , further comprising:

a first blocking diode disposed between the first DC-to-DC converter and the power storage element; and

a second blocking diode disposed between the second DC-to-DC converter and the power storage element.

9. The power generating module according to claim 1 , further comprising:

a bypass switch configured to connect or disconnect an input terminal and an output terminal of the first DC-to-DC converter;

a first voltage measurer configured to measure a voltage of the input terminal of the first DC-to-DC converter;

a second voltage measurer configured to measure a voltage of the output terminal of the first DC-to-DC converter; and

a circuit controller configured to control the bypass switch, based on the voltage of the input terminal of the first DC-to-DC converter and the voltage of the output terminal of the first DC-to-DC converter.

10. The power generating module according to claim 1 , wherein

the photoelectric conversion unit includes an electrode, and

a surface, which receives no incident light, of the photoelectric conversion film is in contact with the electrode.