JPS59126681A - solar cell device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a solar cell device, and in particular, the light-receiving area of a solar cell is configured to have the highest conversion efficiency, for example, about several cm2, and the solar cell is configured to have the highest conversion efficiency. The optical system is configured to emit a good amount of light.

2. Description of the Related Art Techniques for converting sunlight energy into electrical energy using solar cells are well known, and various solar cell devices have been proposed. Therefore, the most efficient light-receiving area of a solar cell is currently several cm2 (
1 to 2 cm"), and current large-scale solar cell devices are constructed by combining a large number of units with a light-receiving area of several cm" and arranging a large number of these units in parallel. Installation losses due to gaps between solar cells, gaps between units, etc. were large, and the efficiency was not necessarily high. In addition, the maximum illuminance of sunlight is about 100,000 Lx,
The dimensions (light-receiving surface) of current solar cells are determined to maximize conversion efficiency in accordance with this maximum illuminance. However, it is clear that if the amount of light irradiated to the solar cells is increased, a larger electrical output can be obtained using a smaller (smaller area) solar cell, which will reduce the amount of solar cells used and increase efficiency. It can often convert solar energy into electrical energy.

The present invention was made in view of the above-mentioned circumstances, and
The optical system is configured so that the light-receiving area of the solar cell is set to the most efficient 1 to 2 cm2, and the solar cell is irradiated with the most efficient amount of light.

FIG. 1 is a configuration diagram for explaining one embodiment of a solar cell device according to the present invention. In the figure, 1 is a lens for concentrating sunlight, and 2 is a light receiving end A near the focal point of the lens 1. 3 is a solar cell disposed on the light output end B side of the light guide rod 2; 4 is a light guide rod made of, for example, quartz;
is an integrated board that integrates a large number of solar cells, and each solar cell has 3
is irradiated with high-energy-density sunlight that is focused by a lens 1 and heat removed by passing through a light guide rod 2 . Each solar cell is therefore illuminated with several times more light than before, and its output voltage is correspondingly higher, but the thermal component is removed during its passage through the light guide.
Solar cells do not suffer thermal breakdown or have their efficiency reduced by heat. Since the conversion efficiency of a solar cell also differs depending on the wavelength of input light, depending on the type of solar cell used, a fluorescent material or the like may be mixed into the photoconductor rod 2 to prevent the light from propagating within the photoconductor rod 2. The conversion efficiency of the solar cell can be further increased by changing the wavelength of the incoming sunlight to the wavelength at which the solar cell used has the highest conversion efficiency.

However, fluorescent substances deteriorate when used for a long period of time, so when using them for a long period of time, as shown in Figure 2, fluorescent substances should be placed between the photoconductor rod 2 and the solar cell 3. It is preferable to arrange a transparent member 5 containing the material, and to use this transparent member 5 by replacing it. In the above embodiment, the light output end of the light guide 2 and the solar cell 3 may be in contact with each other, but if they are arranged with a gap as shown in the figure,
Even during this time, heat is dissipated, and thermal deterioration of the solar cell can be prevented.

As is clear from the above description, according to the present invention, the solar cells are irradiated with cool light that has high energy density and does not generate heat, thereby significantly increasing the conversion efficiency of the solar cells. Since the amount of solar cells used is small, there is an advantage that resources can be saved and costs can be reduced.

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 are configuration diagrams for explaining the present invention in detail, respectively. l...lens, 2...light guide, 3...solar cell. Patent applicant Takashi Mori I Figure 2

Claims (4)

[Claims] (1) A lens for focusing sunlight, and a light guide having a light-receiving end face disposed near the focal point of the lens. and a solar cell disposed on the light output end side of the light guide. (2) The diameter of the lens and the diameter of the light guide are selected in accordance with the most efficient light-receiving area of the solar cell. Solar cell device. (3) The light guide is composed of a light guide rod, and has a fluorescent material in the guide rod, and the fluorescent material allows sunlight introduced into the light guide rod to be directed to the solar cell most effectively. The solar cell device according to claim 1 or 2, characterized in that the solar cell device is configured to convert the wavelength to a wavelength that acts on the solar cell device. (4) The light guide and the solar cell are arranged at a predetermined interval, and the sunlight transmitted through the light guide during the interval is converted into a wavelength that most effectively affects the solar cell. The solar cell device according to claim 1 or claim 2, further comprising a transparent member containing a fluorescent substance.