Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for restoring damped efficiency of solar cells

A technology for solar cells and efficiency attenuation, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of attenuation of minority carrier life, increase production and equipment costs, etc., achieve efficiency recovery, be suitable for popularization and use, and have obvious beneficial effects Effect

Inactive Publication Date: 2014-03-26
ALTUSVIA ENERGY TAICANG
View PDF3 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that although the above methods can solve the problem of minority carrier lifetime attenuation, they need to change the current production process of P-type silicon and increase production and equipment costs.

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
  • Method for restoring damped efficiency of solar cells
  • Method for restoring damped efficiency of solar cells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Material function and technical requirements of the present invention:

[0022] a) The light source equipment 1 is required to meet the C-level standard of the solar simulator or better equipment. Its effect is that the carrier moves at the fastest speed under the strong light irradiation of the battery sheet 2 and obtains the fastest recovery rate. During the annealing treatment, the irradiation intensity affects the recovery rate of the cell 2 .

[0023] b) The battery piece 2 to be processed is the battery piece 2 after decay. During the treatment, the heating and irradiation time ranges from 5 minutes to 30 minutes.

[0024] c) The temperature equipment 3 requires that the temperature can be adjusted within the range of 120°C~200°C. During the annealing treatment, the temperature affects the recovery rate and recovery value of the battery sheet 2 .

[0025] Technical processing steps of the present invention:

[0026] a) Select a group of cells 2 to test their ...

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 relates to a method for restoring damped efficiency of solar cells. The method is characterized by including selecting a solar cell, accumulating irradiation amount, heating and testing. By using an annealing process, damped cell efficiency is restored, and the method is obvious in advantage and suitable for popularization and use.

Description

technical field [0001] The invention relates to a recovery method after the efficiency of a solar battery sheet decays. Background technique [0002] Solar cells made of P-type (boron-doped) silicon wafers containing boron and oxygen will experience varying degrees of attenuation in their minority carrier lifetimes after exposure to light. The greater the boron and oxygen content in the silicon wafer, the more boron-oxygen complexes will be produced in the silicon wafer under the conditions of light or current injection, and the greater the decrease in the minority carrier lifetime will be, resulting in a decrease in the power of the solar cell. [0003] In general, there are several technical measures to reduce the attenuation of minority carrier lifetime: (1) Use materials with no oxygen or low oxygen concentration (such as MCz-Si or FZ-Si), but the cost of equipment and materials is expensive. (2) Use n-type Cz-Si or n-type polysilicon. (3) Use other donors (such as gal...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18H01L21/324
CPCH01L22/20H01L31/1864Y02E10/50Y02P70/50
Inventor 何锐夏正月谢烜邢国强
Owner ALTUSVIA ENERGY TAICANG