Method for reducing photoinduced attenuation defect of solar cell module
阅读说明：本技术 一种降低太阳能电池组件光致衰减缺陷的方法 (Method for reducing photoinduced attenuation defect of solar cell module ) 是由 童锐 柯希满 张忠卫 于 2019-09-27 设计创作，主要内容包括：本发明公开了一种降低太阳能电池组件光致衰减缺陷的方法,包括将完成串焊工序的太阳能电池组件放置在温度为150℃-300℃,光照强度20KW/㎡-80KW/㎡的设备腔体中照射5s-30s。本发明通过将串焊工艺后的太阳能电池片放置在特定的温度、光照条件下照射,通过激发电池片中的氢原子钝化硼氧(B-O)复合体缺陷,从而消除复合中心,使得电池片光电转化效率得到恢复或提升。(The invention discloses a method for reducing photoinduced attenuation defects of a solar cell module, which comprises the step of placing the solar cell module which completes a series welding process in an equipment cavity with the temperature of 150-300 ℃ and the illumination intensity of 20 KW/square meter to 80 KW/square meter for irradiating for 5-30 s. According to the invention, the solar cell after the series welding process is placed under the specific temperature and illumination conditions for irradiation, and the defects of boron-oxygen (B-O) complexes are passivated by exciting hydrogen atoms in the cell, so that a recombination center is eliminated, and the photoelectric conversion efficiency of the cell is recovered or improved.)
1. A method for reducing the light attenuation defect of a solar cell module is characterized in that: the method comprises the step of placing the solar cell module which finishes the series welding process in an equipment cavity with the temperature of 150-300 ℃ and the illumination intensity of 20KW per square meter to 80KW per square meter for 5-30 s.
2. The method of claim 1, wherein the method comprises: the equipment cavity also comprises temperature control equipment and a plurality of LED light sources which are arranged above the cavity at equal intervals.
3. The method of claim 1, wherein the method comprises: the equipment also comprises a transmission device, and the time for driving the solar cell module placed on the transmission device to move from the inlet end to the outlet end of the equipment cavity is equivalent to the time for the solar cell module to be irradiated.
4. The method of claim 1, wherein the method comprises: the temperature was 250 ℃.
5. The method of claim 1, wherein the method comprises: the illumination intensity is 50KW per square meter.
6. The method of claim 1, wherein the method comprises: the illumination time is 15s-20 s.
Technical Field
The invention belongs to the field of solar cell manufacturing, and particularly relates to a method for reducing the photoinduced attenuation defect of a solar cell module.
Background
In the current production process of the solar cell module, a series welding machine welds a welding strip and a cell electrode in a series welding process in an infrared heating mode, in the process, an infrared lamp heats the whole cell, and boron and oxygen in a silicon wafer form a boron-oxygen complex due to infrared illumination on the cell, so that the service life of minority carriers is shortened, and the conversion efficiency of the cell is reduced.
Disclosure of Invention
In order to solve the above problems, the present invention provides a method for reducing the light attenuation defect of a solar cell module.
The technical purpose is achieved, the technical effect is achieved, and the invention is realized through the following technical scheme:
a method for reducing the photoinduced attenuation defect of a solar cell module comprises the step of placing the solar cell module which completes a series welding process in an equipment cavity with the temperature of 150-300 ℃ and the illumination intensity of 20 KW/square meter to 80 KW/square meter for irradiating for 5-30 s.
As a further improvement of the invention, the equipment cavity also comprises a temperature control device and a plurality of LED light sources which are arranged above the cavity at equal intervals.
As a further improvement of the present invention, the apparatus further comprises a conveying device, wherein the conveying device drives the solar cell module placed thereon to move from the inlet end to the outlet end of the apparatus cavity for a time equivalent to the time of the solar cell module being irradiated.
As a further development of the invention, the temperature is 250 ℃.
As a further improvement of the invention, the illumination intensity is 50KW per square meter.
As a further improvement of the invention, the illumination time is 15s-20 s.
The invention has the beneficial effects that: according to the invention, the solar cell after the series welding process is placed under the specific temperature and illumination conditions for irradiation, and the defects of boron-oxygen (B-O) complexes are passivated by exciting hydrogen atoms in the cell, so that a recombination center is eliminated, and the photoelectric conversion efficiency of the cell is recovered or improved.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for performing a light-induced regeneration process on a cell according to the present invention;
wherein: 1-solar cell module, 2-LED light source and 3-transmission device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The following detailed description of the principles of the invention is provided in connection with the accompanying drawings.
The equipment structure for performing the light-induced regeneration treatment on the
The following examples use different process parameters to process the
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