Method for reducing scribing efficiency loss of solar cell
A technology for solar cells and efficiency loss, applied in circuits, photovoltaic power generation, electrical components, etc., can solve problems such as inapplicability of components, no clear efficiency loss, and no research on the efficiency loss of cells, so as to improve the effective life. Reduce the loss of dicing efficiency and improve the effect of passivation
Inactive Publication Date: 2020-12-11
晋能光伏技术有限责任公司
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Problems solved by technology
At present, in the field of photovoltaic semiconductors, HNO 3 , HF, over LID, electric injection, thermal oxygen and other processes to increase the passivation effect. Considering the actual operation and economical practicability of the module side, the conventional passivation method of the battery side is not applicable to the module side, and currently a large number of PV industry Most component factories have not studied the efficiency loss after scribing of cells, including welding machine manufacturers and laser scribing machine manufacturers, have not clarified the efficiency loss after scribing
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[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below, obviously, the described embodiments are only some of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0032] The embodiment of the present invention discloses a method for reducing the loss of scribing efficiency of solar cells, comprising the following steps:
[0033] (1) Take the solar cell sheet and carry out laser scribing, and test the efficiency of the solar cell sheet before scribing;
[0034] (2) Evenly spray the iodine solution of 0.01-0.4mol / L on the fractured surface after the slicing of the solar cell, and the spraying time of each fractured surface is 0.4-0.6s;
[0035] (3) Test the efficiency of the diced solar...
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The invention discloses a method for reducing the scribing efficiency loss of a solar cell. The method comprises the following steps: (1) carrying out laser scribing on the solar cell, and testing theefficiency of the solar cell before scribing; (2) uniformly spraying a 0.01-0.4 mol / L iodine solution on the fracture surfaces of the solar cell after scribing, wherein the spraying time of each fracture surface is 0.4-0.6 s; and (3) testing the efficiency of the scribed solar cell processed in step (2), and calculating the efficiency loss. The iodine solution is sprayed on the scribing fracturesurfaces, so that the efficiency loss after scribing can be effectively reduced, and the production efficiency is improved.
Description
technical field [0001] The invention relates to the technical field of photovoltaic modules, and more specifically relates to a method for reducing the loss of scribing efficiency of solar cells. Background technique [0002] In recent years, the technical route of photovoltaic modules has been contended by a hundred schools of thought, and new products are changing with each passing day, including silicon wafers of different sizes 166, 182, and 210, and technologies such as half-wafer, shingled, and lap welding, which have greatly reduced the cost of electricity and greatly promoted the progress of grid parity. . However, since technology development is already in a relatively mature period, there is basically no room for decline in auxiliary materials at the component side. Therefore, most component factories achieve the purpose of reducing costs by improving efficiency. The main way to improve efficiency is to increase silicon wafers or increase the cost per unit area. p...
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IPC IPC(8): H01L31/18H01L31/042
CPCH01L31/1868H01L31/042Y02E10/50Y02P70/50
Inventor 张登科杨立友贾慧君杨文豹
Owner 晋能光伏技术有限责任公司