Solar battery assembly, up-conversion piece of solar battery sheet and preparation method of up-conversion piece

A technology of solar cells and conversion parts, which is applied in the direction of electrical components, circuits, photovoltaic power generation, etc., can solve the problems of low conversion efficiency on the conversion layer, reduce the light transmittance of the conversion layer, and the difficulty of realizing the conversion layer, so as to improve the photoelectric conversion Efficiency, reduced specular reflection, and improved light transmission

Active Publication Date: 2012-11-07
BEIJING NAURA MICROELECTRONICS EQUIP CO LTD
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AI Technical Summary

Problems solved by technology

[0004] For this reason, people use up-conversion fluorescent materials to simply coat solar cells to form conversion layers. However, due to the low printing density and the blocking of paint, the light transmittance of the conversion layer is greatly reduced.
In addition, the conversion layer also has the problems of being inconvenient to use and having a low service life.
Moreover, for up-conversion luminescent materials, since multiple low-energy photons are required to be converted into one high-energy photon, the excitation light of a specific wavelength must reach a certain intensity threshold to form an effective up-conversion, and this The conversion layer formed by coating is difficult to realize under sunlight irradiation, so the up-conversion efficiency of the existing conversion layer is very low

Method used

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  • Solar battery assembly, up-conversion piece of solar battery sheet and preparation method of up-conversion piece
  • Solar battery assembly, up-conversion piece of solar battery sheet and preparation method of up-conversion piece

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preparation example Construction

[0044] The preparation method of the up-converter 10 according to the embodiment of the present invention includes: uniformly mixing the phosphor powder and the glass frit, pouring it into a mold, and cooling to make the up-converter 10 of the solar cell with a convex upper surface.

[0045] It should be noted that, in the case of selecting an inorganic glass material to form the transparent glass substrate 11, the glass frit can use either a sol (such as water glass, etc.) or a glass powder. When using a sol, the phosphor powder 11 After mixing with the glass frit, pour it into the mold for hydrolysis and drying. When using glass powder, after mixing the phosphor powder 11 with the glass frit, you only need to heat it into a melt, pour it into the mold and cool it down. In the case of selecting organic glass material to form the transparent glass substrate 11, it is only necessary to combine the phosphor body 11 with the organic glass material (i.e. one of polymethyl methacryl...

Embodiment 1

[0050] I) Raw materials

[0051] Phosphor powder: NaYF4:Er in powder state for commercial use

[0052] Raw material of transparent scattering film layer: tetraethyl orthosilicate

[0053] Glass frit: Silicate glass powder

[0054] II) Preparation of upconverters

[0055] First, take 10g of NaYF4:Er powder, soak it in an aqueous solution of tetraethyl orthosilicate for 2 hours, take it out and dry it, so as to obtain NaYF4:Er powder covered with a transparent silicon dioxide film.

[0056] Thereafter, mix the above-mentioned powder with 1 kg of silicate glass powder material evenly, melt it at a high temperature above 450 degrees Celsius, pour it into a mold, and cut it into small pieces of 125mm×125mm after cooling. The mold has an arc-shaped inner surface with a curvature radius of 35-40 mm, and a maximum depth of 20 mm.

[0057] III) Preparation of solar cell modules

[0058] The up-conversion element obtained above is packaged on a single solar cell by known means, and...

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Abstract

The invention discloses a solar battery assembly, an up-conversion piece of a solar battery sheet and a preparation method of the up-conversion piece. The up-conversion piece of the solar battery sheet comprises a transparent glass substrate and fluorescent powder scattered in the transparent glass substrate, wherein the transparent glass substrate has a convex upper surface. According to the up-conversion piece provided by the invention, as the up-conversion piece has the convex upper surface, the surface area is increased, the photic area is increased, so that the total quantity of the sunshine radiating on the upper surface of the solar battery sheet is increased; a plurality of photons with low energy can be focused under the radiation of the sunshine so as to be converted into a photon with high energy; and moreover, owing to the convex upper surface, the mirror reflection quantity of the sunshine radiating to the upper surface of the up-conversion piece is reduced and the refraction quantity is increased greatly, therefore, the photoelectric conversion efficiency of the solar battery sheet is improved.

Description

technical field [0001] The invention relates to a solar battery module, an up-converting part of a solar battery sheet and a preparation method thereof. Background technique [0002] As a green energy that can solve the depletion of fossil fuels and the problems of the earth's environment, solar energy has attracted more and more attention. A solar cell that converts solar energy into electrical energy by using the photovoltaic effect is one of the important devices for rationally utilizing solar energy at present. However, the theoretical maximum photoelectric conversion efficiency of silicon-based solar cells widely used at present is only 30%, and the actual conversion efficiency is about 15-18%. [0003] Typically, the wavelength of the solar spectrum reaching the ground covers 200-2500nm. However, traditional solar cell technology mostly uses silicon-based materials as the main body, so it can only effectively absorb 300-1000nm sunlight, but cannot absorb and utilize ...

Claims

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Application Information

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IPC IPC(8): H01L31/055H01L31/18
CPCY02E10/50Y02E10/52Y02P70/50
Inventor 肖青平
Owner BEIJING NAURA MICROELECTRONICS EQUIP CO LTD
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