CN202712204U

CN202712204U - Solar cell module

Info

Publication number: CN202712204U
Application number: CN 201220383906
Authority: CN
Inventors: 王庆东
Original assignee: SHENZHEN WEIGUANGNENG ELECTRONICS SCIENCE AND TECHNOLOGY Co Ltd
Current assignee: SHENZHEN WEIGUANGNENG ELECTRONICS SCIENCE AND TECHNOLOGY Co Ltd
Priority date: 2012-08-03
Filing date: 2012-08-03
Publication date: 2013-01-30
Anticipated expiration: 2022-08-03

Abstract

The utility model discloses a solar cell module. The solar cell module comprises a cell substrate, wherein the cell substrate comprises a sensitive surface, a junction surface and a backlight surface in sequence; a plurality of finger-shaped electrodes are arranged on the sensitive surface; and a back electrode is arranged on the backlight surface. According to the structure of the solar cell module, the width of the finger-shaped electrodes can be effectively reduced, and the shading effect of the finger-shaped electrodes on the surface of the solar cell is reduced, thereby improving the conversion efficiency.

Description

Solar module

Technical field

The utility model relates to a kind of solar module, belongs to new energy field.

Background technology

Along with the concern of the mankind to environmental protection, solar energy receives increasing the concern and attention as a kind of green energy resource, has become one of main energy at Countries solar energies such as Germany.Solar cell is a kind of opto-electronic conversion effect of utilizing, and sunlight is converted to the device of electric energy, is a kind of free of contamination clear energy sources.

At present, existing solar cell is generally and comprises p-n composition surface (p-n Junction on the market, common photodiode is along structure partially) semiconductor element, for example have monocrystalline silicon, polysilicon, amorphous silicon or other photodiode semiconductor elements on p-n composition surface.When the irradiation semiconductor element, semiconductor element for example silicon atom electronics is separated with atomic nucleus, produces drift current so that the p-n composition surface forms internal electric field.

In order to be that solar energy can be utilized, the current lead-through that the inside solar energy battery electric field must be produced is to outside, also just need to make metal electrode on the surface of solar cell, yet this has caused a problem: thus metal electrode can consist of certain efficient that reduces light absorption of blocking to semi-conductive sensitive surface, and therefore seeking a kind of solar module structure rational in infrastructure is one of this area urgent problem.

Summary of the invention

For the defective of prior art, the invention discloses a kind of solar module, by the improvement of modular construction, effectively reduce the light-shading effect that finger electrode causes solar cell surface, improve transformation efficiency.

For achieving the above object, the utility model is achieved through the following technical solutions:

Solar module comprises cell substrates, and described cell substrates is made of successively sensitive surface, composition surface, shady face; Described sensitive surface is provided with a plurality of finger electrodes; Described shady face is provided with backplate.

By the setting of finger electrode, but not adopt traditional large-area metallic plate electrode, effectively kept the light-receiving area of sensitive surface.Composition surface wherein is traditional p-n composition surface, realizes opto-electronic conversion, and wherein the function of finger electrode is to compile the electric current that the solar cell sensitive surface is produced by light, and backplate is used for the electric current of conducting rear surface of solar cell.

For the Weak current on a plurality of finger electrodes is compiled the realization industrial utilization, be coated with a plurality of bus electrodes on the described finger electrode and consist of electrical connection, described bus electrode is vertical with described finger electrode distribution arrangement.

Further, the capture-effect that causes in solar cell surface in order to reduce finger electrode, the live width of reduction finger electrode, its resistance value does not raise again simultaneously, the height to width ratio of described finger electrode is 0.2-0.3, thus the balance between the performance of obtaining and the resistance.

Generally, the live width of finger electrode is very little, can distribute many at sensitive surface, and normally hundreds of, its order of magnitude is on micron level, and for example width about 40 is to about 80 microns, highly about 15 to about 25 microns.

In the utility model, because the thickness of the common single conductive layer of restriction of technology is the restriction that is subject to fixed value, in order to make the finger electrode resistance value maintain reasonable level, can reduce again the width of finger electrode, described finger electrode is comprised of the first conductive layer and the second conductive layer, wherein the first conductive layer contacts with sensitive surface, and the second conductive layer width is greater than the first conductive layer.

By using a plurality of conductive layers as finger electrode, so that width is continued to reduce with ratio highly.

In the utility model, described the first conductive layer, the second conductive layer are conductive silver glue.

In the utility model, described cell substrates is monocrystalline silicon substrate, polycrystalline silicon substrate or amorphous silicon substrate.

In the utility model, described bus electrode is conductive silver glue.

In the utility model, described backplate is aluminium sheet.

What should be noted that is that all use the material of conductive silver glue also can adopt aluminium glue in above-mentioned, preferably adopt elargol to have better electric property.

Solar module of the present utility model effectively reduces finger electrode to the light-shading effect that solar cell surface causes, and has improved electricity conversion.

Description of drawings

Fig. 1 is the structure chart of the utility model battery component;

Fig. 2 is finger electrode structure figure of the present utility model.

Embodiment

With reference to figure 1, front view for the utility model battery component, comprise semiconductor substrate 1, formed successively by sensitive surface 11, p-n composition surface 2, shady face 12, wherein be distributed with a plurality of finger electrodes 3 at sensitive surface, with semiconductor substrate 1 electrical contact, be electrically connected with two bus electrodes 4 at finger electrode, be provided with backplate 5 at shady face, with semiconductor substrate back side electrical contact.

With reference to figure 2, shown the structure of finger electrode, be double-layer structure, wherein the first conductive layer 31 contacts with the sensitive surface of semiconductor substrate 1, and the second conductive layer 32 width are greater than the first conductive layer.

Claims

1. solar module comprises cell substrates, it is characterized in that described cell substrates is made of successively sensitive surface, composition surface, shady face; Described sensitive surface is provided with a plurality of finger electrodes; Described shady face is provided with backplate.

2. solar module according to claim 1 is characterized in that being coated with on the described finger electrode a plurality of bus electrodes and consists of electrical connection, and described bus electrode is vertical with described finger electrode distribution arrangement.

3. solar module according to claim 1, the height to width ratio that it is characterized in that described finger electrode is 0.2-0.3.

4. solar module according to claim 1 is characterized in that described finger electrode is comprised of the first conductive layer and the second conductive layer, and wherein the second conductive layer contacts with sensitive surface, and the second conductive layer width is greater than the first conductive layer.

5. solar module according to claim 4 is characterized in that described the first conductive layer, the second conductive layer are conductive silver glue.

6. solar module according to claim 1 is characterized in that described cell substrates is monocrystalline silicon substrate, polycrystalline silicon substrate or amorphous silicon substrate.

7. solar module according to claim 2 is characterized in that described bus electrode is conductive silver glue.

8. solar module according to claim 1 is characterized in that described backplate is aluminium sheet.