Photoretroreflective counter electrode of a solar cell and preparation method thereof

A solar cell and retro-reflective technology, which is applied in the field of solar cells, can solve the problems of impossibly high reflection efficiency, large light loss of metal reflective film, and change of optical path, so as to improve photoelectric conversion efficiency, small light loss, and long service life Effect

Inactive Publication Date: 2017-11-03
SHANGHAI ZAOFU NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above method is still limited, mainly because it has the following two disadvantages: (1) the light loss of the metal reflective film is large, and the reflection efficiency cannot be very high; (2) although the metal reflective film has a high Reflectivity, but its reflection principle is specular reflection. The incident light (except for vertical incident light) that reaches the surface of the metal reflective film changes after specular reflection, and the efficiency of returning to the solar cell is not high.

Method used

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  • Photoretroreflective counter electrode of a solar cell and preparation method thereof
  • Photoretroreflective counter electrode of a solar cell and preparation method thereof
  • Photoretroreflective counter electrode of a solar cell and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Such as figure 1 As shown, the light retroreflective counter electrode of the dye-sensitized solar cell in this embodiment includes a substrate 1, a first reflective layer 2, a second reflective layer 3, and a transparent resin layer sequentially arranged on the substrate 1 from bottom to top. 5. Adhesive layer 6 and solar cell counter electrode layer 7, wherein the thickness of the second reflective layer 3 is greater than the thickness of the first reflective layer 2, and the second reflective layer 3 is evenly distributed with glass beads 4, the glass The lower part of the microbead 4 is embedded in the second reflective layer 3 , and the upper part is embedded in the transparent resin layer 5 .

[0046] Such as figure 2 As shown, the method for preparing the photoretroreflective counter electrode of the dye-sensitized solar cell in this embodiment includes the following steps:

[0047] 1) Substrate 1 cleaning

[0048] Take a stainless steel substrate 1 with a le...

Embodiment 2

[0064] Fabrication of light retroreflective counter electrode for dye-sensitized solar cells:

[0065] 1) Substrate 1 cleaning

[0066] Take a glass substrate 1 with a length of 2 cm and a width of 1.5 cm, and clean the surface of the substrate 1 with cleaning agent and water, and dry it.

[0067] 2) Coating the first reflective layer 2

[0068] Using screen printing technology, the high-temperature silver reflective layer paste is evenly coated on the surface of a clean glass substrate 1 to form the first reflective layer 2. The mesh number of the screen is 250 mesh, and the thickness of the first reflective layer 2 is 2.5 microns. Heat at 500°C for 60 minutes to make it fully cured.

[0069] 3) Coating the second reflective layer 3

[0070] Using screen printing technology, the high-temperature silver reflective layer paste is evenly coated on the first reflective layer 2 to form the second reflective layer 3. The screen mesh is 150 mesh, and the printing is repeated 5 t...

Embodiment 3

[0082] Fabrication of light retroreflective counter electrode for dye-sensitized solar cells:

[0083] 1) Substrate 1 cleaning

[0084] Take a plastic substrate 1 with a length of 2 cm and a width of 1.5 cm, and clean the surface of the substrate 1 with cleaning agent and water, and dry it.

[0085] 2) Coating the first reflective layer 2

[0086] Using screen printing technology, the low-temperature silver reflective layer paste is evenly coated on the surface of a clean glass substrate 1 to form the first reflective layer 2. The mesh number of the screen screen is 250 mesh, and the thickness of the first reflective layer 2 is 3 microns. Heat at 150°C for 30 minutes to make it fully cured.

[0087] 3) Coating the second reflective layer 3

[0088] Using screen printing technology, the low-temperature silver reflective layer paste is evenly coated on the first reflective layer 2 to form the second reflective layer 3. The screen mesh is 100 mesh, and the printing is repeate...

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Abstract

The invention relates to a solar cell light return reflection counter electrode and a manufacturing method thereof. The counter electrode comprises a substrate, and a first reflection layer, a second reflection layer, a transparent resin layer, an adhesive layer and a solar cell counter electrode layer sequentially arranged on the substrate from bottom to top, wherein the thickness of the second reflection layer is larger than that of the first reflection layer; glass beads are uniformly distributed in the second reflection layer; lower parts of the glass beads are buried in the second reflection layer, and the upper parts are buried in the transparent resin layer. The manufacturing method comprises steps of substrate cleaning, first reflection layer coating, second reflection layer coating, glass bead burying, transparent resin layer coating, adhesive layer coating and laminated combination and the like. Compared with the prior art, the solar cell light return reflection counter electrode and the manufacturing method thereof of the invention have the advantages that the overall structure is simple and compact; the economic practicality is good; the material has a low price; the technical problem of low light utilization rate by the current solar cell can be effectively solved; industrial production is facilitated; and the application prospects are good.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and relates to a photoretroreflective counter electrode of a solar cell and a preparation method thereof. Background technique [0002] A solar cell is a device that directly converts light energy into electrical energy through the photoelectric effect or photochemical effect. When sunlight irradiates on the photosensitive layer, a small part of the light is reflected by the surface, another small part of the light is absorbed by the photosensitive layer, and most of the light is transmitted. Obviously, if the transmitted light is not utilized, this part of the light will be wasted. [0003] At present, in order to improve the efficiency of solar cells, it is a simple and effective way to place a metal film on the back of the counter electrode. By adding a layer of metal reflective film on the back of the counter electrode, the underutilized light transmitted from the photoanode is reflecte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/0224H01L31/18
CPCH01L31/022425H01L31/1876Y02E10/50Y02P70/50
Inventor 黄福新凌雪陈文忠
Owner SHANGHAI ZAOFU NEW MATERIAL TECH CO LTD
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