Mass-production apparatus capable of fast improving photoinduced degradation of a P-type crystalline silicon cell and using method thereof

A technology of crystalline silicon cells and light-induced attenuation, applied in the field of solar cells, can solve problems such as difficulties in large-scale mass production, increased production costs, and decreased cell efficiency, and achieve improved processing efficiency and product quality, consistent airflow temperature, and light-induced attenuation. The effect of attenuation improvement

Active Publication Date: 2015-12-09
CECEP SOLAR ENERGY TECH (ZHENJIANG) CO LTD
View PDF6 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, p-type crystalline silicon solar cells will experience a decrease in cell efficiency after being exposed to light, and the attenuation can even reach 1-9% (relative value), which is especially obvious in p-type monocrystalline silicon cells. Additional solar cells and Power loss of components, and prone to further loss of power generation due to component power mismatch
[0004] It is generally believed that the cause of light-induced attenuation in crystalline silicon solar cells is mainly boron-oxygen recombination. Photo-generated current carrying or current injection will cause interstitial oxygen atoms and boron atoms in p-type silicon wafers to form boron-oxygen complexes, reducing the minority carrier lifetime, resulting in Decreased cell and module efficiency
At present, there are two main ways to improve the light-induce...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Mass-production apparatus capable of fast improving photoinduced degradation of a P-type crystalline silicon cell and using method thereof
  • Mass-production apparatus capable of fast improving photoinduced degradation of a P-type crystalline silicon cell and using method thereof
  • Mass-production apparatus capable of fast improving photoinduced degradation of a P-type crystalline silicon cell and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Stack 100 pieces of p-type monocrystalline silicon solar cells according to the order of all the fronts up and put them into the silicon wafer carrying box, and use DC power supply to energize, and the current density is set to 1000mA / cm 2 , keep the temperature of the incubator at 250°C, set the speed of the conveyor belt so that the passage time of the silicon wafer carrier box in the incubator is 15 minutes, and take out the cells after cooling naturally. The treated cells were compared with the same batch of untreated cells, and the results are as follows:

[0037]

Embodiment 2

[0039] Stack 200 pieces of p-type polycrystalline silicon solar cells according to the order of all the fronts up and put them into the silicon wafer carrying box, and use DC power supply to energize, and the current density is set to 3000mA / cm 2 , keep the temperature of the incubator at 375°C, set the speed of the conveyor belt so that the passage time of the silicon wafer carrier box in the incubator is 8 minutes, and take out the cells after cooling naturally. The treated cells were compared with the same batch of untreated cells, and the results are as follows:

[0040]

Embodiment 3

[0042] Stack 55 pieces of p-type monocrystalline silicon solar cells according to the order of all the fronts up and put them into the silicon wafer carrying box, and electrify with a pulse power supply, and the current density is set to 501mA / cm 2 , keep the temperature of the incubator at 230°C, set the speed of the conveyor belt so that the silicon wafer carrying box passes through the incubator for 20 minutes, and take out the cells after cooling naturally. The treated cells were compared with the same batch of untreated cells, and the results are as follows:

[0043]

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a mass-production apparatus capable of fast improving photo-induced degradation of a P-type crystalline silicon cell. The apparatus includes: a power source, a thermotank, a conveying belt which penetrates the thermostat and a silicon chip carrying case which is arranged on the conveying belt. The silicon chip carrying case includes an upper conducting layer and a lower conducting layer which are respectively connected to a positive electrode and a negative electrode of the power source via a wire. The P-type crystalline silicon cell slice layers are stacked inside the silicon chip carrying case. A plurality of heating apparatuses and a plurality of ventilating apparatuses are arranged inside the thermotank. The heating apparatuses are installed on the thermotank inner wall on two sides of the conveying belt. The ventilating apparatuses are installed in the surrounding of the heating apparatuses. The apparatus and the method of the invention can simultaneously improve photo-induced degradation of bulk solar cells and are easy to operate. Processing time is effectively shortened by optimizing energized current and heating temperature. According to the invention, production capacity is increased, production cost is lowered, and the requirement for industrial production is met.

Description

technical field [0001] The invention relates to a mass production device for rapidly improving the light-induced attenuation of p-type crystalline silicon solar cells, belonging to the field of solar cells. Background technique [0002] Solar energy has the "infinity" of reserves, the universality of existence, the cleanliness of utilization, and the economy of utilization. It plays an important role in the transformation of the world's energy structure and becomes an ideal alternative energy source. P-type crystalline silicon solar cells and components are currently the mainstream of solar cells, and their market share has remained above 80% in recent years. [0003] At present, p-type crystalline silicon solar cells will experience a decrease in cell efficiency after being exposed to light, and the attenuation can even reach 1-9% (relative value), which is especially obvious in p-type monocrystalline silicon cells. Additional solar cells and The power loss of the componen...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01L31/18
CPCH01L31/1804H01L31/1876Y02E10/547Y02P70/50
Inventor 周肃勾宪芳范维涛黄青松黄惜惜黄钧林张鑫
Owner CECEP SOLAR ENERGY TECH (ZHENJIANG) CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products