JP2011029571A - Solar battery cell cover - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a means of increasing the efficiency of a conventional solar battery cell by about 20%, by converting ultraviolet rays into a visible light region of relatively proper power generating efficiency and by possibly adding the light to visible light rays conventionally contributing to power generation, because of a reduction in power generating efficiency of the solar battery cell generally for the ultraviolet rays and infrared rays. <P>SOLUTION: As a means for the measure, a flat solar battery cell cover having a microstructure as in Figs. 1-3 (not shown) is devised. Since the power generating efficiency is increased more by removing the infrared rays (heat rays), the efficiency of a power generation cell is increased also by adopting this conventionally existing technology which is used in combination with the technique. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a solar cell and improving power generation efficiency.

A cell cover of a conventional solar battery is sealed with a resin or covered with a glass cover or the like.
The waterproof structure alone does not help improve the efficiency of solar cells.

However, (1) A film that efficiently passes or reflects a visible light region (400 nm to 1100 nm) in direct sunlight.
(2) A reflector that reflects 100% of ultraviolet light and a film that reflects infrared light.
(3) A fluorescent film that efficiently converts ultraviolet light into visible light.
{Circle around (4)} By combining film technologies that reflect all infrared light of 1200 nm or more, it is possible to increase the energy of wavelengths of 400 nm to 1100 nm with good solar cell efficiency.
At the same time, it is possible to eliminate the decrease in efficiency due to the temperature rise of the solar cell.
In view of this, the present invention is directed to a method for injecting ultraviolet light contained in solar rays into a fluorescent film standing perpendicular to the solar rays and injecting visible light energy from the fluorescent film into the solar cell. .
● Visible light range (400 nm to 1100 nm) in sunlight is focused on measures to directly absorb solar cells and measures to reflect visible light reflected from solar cells again (light confinement).
● Provide a film that can transmit visible light well but reflect all infrared light.

In the first invention, ultraviolet light is directly extracted from sunlight, and other than ultraviolet light is directly put into a solar battery cell. On the other hand, the extracted ultraviolet light is applied to an efficient fluorescent light-emitting film or EL light-emitting nanoparticle and converted into the visible light region, and again synthesized directly into light.
This method is efficiently performed at low cost.
The second invention is a film structure that removes (reflects) infrared light directly from sunlight and has a waterproof function in combination with not taking it into the interior.

The power generation efficiency is improved by about 20% simply by attaching the solar cell cover using the first and second inventions to the upper surface of the existing solar cell.

FIG. 1 is a diagram showing a solar cell high-efficiency cover (measure 1) using a fluorescent material. FIG. 2 is a view showing a solar cell high-efficiency cover (measure 2) using a fluorescent material. FIG. 3 is a view showing a solar cell high-efficiency cover (measure 3) using a fluorescent material. FIG. 4 is a diagram showing a solar cell high-efficiency cover using a fluorescent material (policy 1, policy 2, and policy 3). FIG. 5 is a diagram showing a solar cell high-efficiency cover using a fluorescent material (policy 1, policy 2, and policy 3). FIG. 6 is a diagram (measure 4) in the case of a concentrating solar cell. In a shape in which a spherical Si solar cell is arranged in the light condensing part, (ultraviolet light + visible light) is efficiently introduced into the spherical Si solar cell by a reflective film using a fluorescent material. FIG. 7 is a diagram (measure 5) in the case of a concentrating solar cell. FIG. 10 is a diagram (measure 5) in the case of a concentrating solar cell that efficiently introduces (ultraviolet light + visible light) into an InGaAs type solar cell in which a reflecting film using a fluorescent material is arranged by condensing by a lens. FIG. 8 is a diagram (measure 6) in the case of a concentrating solar cell. Condensation that efficiently introduces (ultraviolet light + visible light) with a reflective film using a fluorescent material, with an InGaAs type solar cell placed at the focal point of a parabolic mirror coated with a fluorescent film instead of a lens FIG. 6 is a diagram (measure 6) in the case of a solar cell.

Claims (5)

Wavelength conversion materials such as fluorescent films and EL light-emitting nanoparticle films are set up perpendicular to the sun's rays so that direct light is not blocked or disturbed A structure that reflects only the ultraviolet rays over the entire surface and applies the rays to the fluorescent film and the EL light-emitting nanoparticle film Structure that absorbs and merges the emitted visible light into the solar cell Films and structures that pass visible light and re-reflect to confine the reflected light after passing through Adopting a film and lens with a structure that totally reflects infrared rays and allows ultraviolet rays and visible rays to pass through without being attenuated.