CN203038935U

CN203038935U - Silicon wafer for solar cell

Info

Publication number: CN203038935U
Application number: CN 201320015842
Authority: CN
Inventors: 谢小敏
Original assignee: ULTRA ENERGY (WEIFANG) TECHNOLOGY Co Ltd
Current assignee: ULTRA ENERGY (WEIFANG) TECHNOLOGY Co Ltd
Priority date: 2013-01-14
Filing date: 2013-01-14
Publication date: 2013-07-03
Anticipated expiration: 2023-01-14

Abstract

The utility model belongs to the technical field of solar cells, and particularly relates to a silicon wafer for a solar cell. The silicon wafer for the solar cell comprises a silicon wafer body, one side face of the silicon wafer body is provided with a plurality of inverted taper holes, the axes of the taper holes are vertical to the side face of the silicon wafer body, and the cone vertex angles of the taper holes are no greater than 90 degrees; the silicon wafer for the solar cell is provided with the inverted taper holes, the absorption area is increased, and secondary absorption of solar energy is allowed, effectively improving conversion efficiency of solar energy, and solving the problem of low conversion efficiency of a silicon wafer for a solar cell provided by the prior art; and less raw materials are required by a silicon wafer of the same thickness, effectively reducing production cost.

Description

A kind of solar energy battery adopted silicon chip

Technical field

The utility model belongs to technical field of solar batteries, relates in particular to a kind of solar energy battery adopted silicon chip.

Background technology

Solar energy refers to the emittance of sunlight, solar energy is one of energy that cleans most, and is inexhaustible, can be as generating, solar power generation is a kind of emerging renewable energy utilization mode, and solar cell is to utilize the photovoltaic effect of semi-conducting material to make.At present, solar cell is based on silica-based battery, in silica-based battery, with monocrystalline silicon and the polysilicon material as opto-electronic conversion.

Improving the optical conversion efficiencies of solar cell and reducing cost is the main direction of solar cell research, guaranteeing under the constant prerequisite of solar cell properties, the thickness that reduces silicon chip is significant to reducing cost, at present, a kind of ultra thin silicon wafers as the described solar cell of Chinese utility model patent CN202307916U, comprise that thickness is 120 microns to 160 microns wafer bulk, its surface is the rectangular pyramid matte, this ultra thin silicon wafers can reduce reflected intensity, but mainly there is following problem in this ultra thin silicon wafers: cost height, conversion efficiency are low.

The utility model content

The purpose of this utility model is to provide a kind of solar energy battery adopted silicon chip, is intended to solve the low problem of solar energy battery adopted silicon chip conversion efficiency that prior art provides.

The utility model is to realize like this, a kind of solar energy battery adopted silicon chip, described solar energy battery adopted silicon chip comprises: the silicon chip body, one side of described silicon chip body is provided with some inverted bellmouths, the side of the described silicon chip body of the axis normal of described bellmouth, and circular cone drift angle≤90 of described bellmouth °.

As a kind of improvement, the one side that described solar energy battery adopted silicon chip is provided with described bellmouth is provided with for the groove that electrode of solar battery is installed.

The described solar energy battery adopted silicon chip of the solar energy battery adopted silicon chip that the utility model provides comprises: the silicon chip body, one side of described silicon chip body is provided with some inverted bellmouths, the side of the described silicon chip body of the axis normal of described bellmouth, and circular cone drift angle≤90 of described bellmouth °; This solar energy battery adopted silicon chip is provided with inverted bellmouth, has increased absorption area, but secondary absorbs solar energy simultaneously, has improved the transformation efficiency of solar energy effectively, has solved the low problem of solar energy battery adopted silicon chip conversion efficiency that prior art provides; The needed raw material of the silicon chip of same thickness have still less reduced production cost effectively.

Description of drawings

Fig. 1 is the structural representation of the solar energy battery adopted silicon chip that provides of the utility model first embodiment;

Fig. 2 is the structural representation of the solar energy battery adopted silicon chip that provides of the utility model second embodiment;

Fig. 3 is the circular cone drift angle of the bellmouth of the solar energy battery adopted silicon chip that provides of the utility model solar absorption schematic diagram when being acute angle;

Fig. 4 is the circular cone drift angle of the bellmouth of the solar energy battery adopted silicon chip that provides of the utility model solar absorption schematic diagram when being the right angle;

Fig. 5 is the circular cone drift angle of the bellmouth of the solar energy battery adopted silicon chip that provides of the utility model solar absorption schematic diagram when being the obtuse angle;

Wherein, 1, the silicon chip body, 2, bellmouth, 3, the circular cone drift angle, 4, groove.

Embodiment

In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.

Fig. 1 shows the structural representation of the solar energy battery adopted silicon chip that the utility model first embodiment provides, as shown in Figure 1, this solar energy battery adopted silicon chip comprises: silicon chip body 1, be rectangle shape and one side of this silicon chip body 1 is provided with some inverted bellmouths 2, the side of the axis normal silicon chip body 1 of this bellmouth 2, and 3≤90 ° of the circular cone drift angles of this bellmouth 2.

In this embodiment, this solar energy battery adopted silicon chip is provided with the bellmouth of inverted conical, has increased absorption area, but secondary absorbs solar energy simultaneously, improve the transformation efficiency of solar energy effectively, solved the low problem of solar energy battery adopted silicon chip conversion efficiency that prior art provides; The needed raw material of the silicon chip of same thickness have still less reduced production cost effectively.

Fig. 2 shows the structural representation of the solar energy battery adopted silicon chip that the utility model second embodiment provides, and as shown in Figure 2, the one side that this solar energy battery adopted silicon chip is provided with bellmouth 2 is provided with groove 4, and this groove 4 is used for installing electrode of solar battery.

For the ease of understanding, 3 to Fig. 5 operation principles that solar energy battery adopted silicon chip is absorbed solar energy are explained as follows by reference to the accompanying drawings:

Adjust silicon chip body 1, sunlight is come along the axis direction irradiation of bellmouth 2, part solar energy is absorbed by the wall surface of the hole of bellmouth 2, and unabsorbed light can be by the reflection of the hole wall of bellmouth 2, and unabsorbed solar energy can be again absorbed by the wall surface of the hole of corresponding bellmouth 2;

Solar absorption schematic diagram when the drift angle that Fig. 3 shows the bellmouth of the solar energy battery adopted silicon chip that the utility model provides is acute angle, as shown in Figure 3, circular cone drift angle 3 is β 1, and 1＜90 ° of 0 °＜β, because of 1=180 ° of 2 α 1+ β, α is 1＞45 ° so, 1＞90 ° of 2 α, all unabsorbed light all can be reflected on corresponding the sidewall, and unabsorbed solar energy all can be absorbed by secondary.

Solar absorption schematic diagram when the drift angle that Fig. 4 shows the bellmouth of the solar energy battery adopted silicon chip that the utility model provides is the right angle, as shown in Figure 4, circular cone drift angle 3 is β 2, and β 2=90 °, because of 2=180 ° of 2 α 2+ β, α 2=45 ° so, 2 α 2=90 °, all unabsorbed light all can be reflected on corresponding the sidewall, and unabsorbed solar energy all can be absorbed by secondary.

Solar absorption schematic diagram when the drift angle that Fig. 5 shows the bellmouth of the solar energy battery adopted silicon chip that the utility model provides is the obtuse angle, as shown in Figure 5, circular cone drift angle 3 is β 3, and 3＜180 ° of 90 °＜β, because of 3=180 ° of 2 α 3+ β, α is 3＜45 ° so, 3＜90 ° of 2 α, unabsorbed light can not be reflected on corresponding the sidewall all, and unabsorbed solar energy has only part to be absorbed by secondary.

Comparison diagram 3, Fig. 4 and Fig. 5, thus the size of circular cone drift angle 3 be chosen as≤90 °.

Solar energy battery adopted silicon chip comprises: be rectangle shape and one side of silicon chip body, this silicon chip body is provided with some inverted bellmouths, the side of the axis normal silicon chip body of this bellmouth, and circular cone drift angle≤90 of this bellmouth °; This solar energy battery adopted silicon chip is provided with inverted bellmouth, both increased the area that absorbs solar energy, but secondary absorbs solar energy simultaneously, has improved the transformation efficiency of solar energy effectively, has solved the low problem of solar energy battery adopted silicon chip conversion efficiency that prior art provides; The needed raw material of the silicon chip of same thickness have still less reduced production cost effectively.

The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.

Claims

1. solar energy battery adopted silicon chip, it is characterized in that, described solar energy battery adopted silicon chip comprises: the silicon chip body, one side of described silicon chip body is provided with some inverted bellmouths, the side of the described silicon chip body of the axis normal of described bellmouth, and circular cone drift angle≤90 of described bellmouth °.

2. solar energy battery adopted silicon chip according to claim 1 is characterized in that, the one side that described solar energy battery adopted silicon chip is provided with described bellmouth is provided with for the groove that electrode of solar battery is installed.