Method for measuring height and width of crystalline silica solar cell grid line

Abstract

The invention discloses a method for measuring height of a crystalline silica solar cell grid line. The method comprises following steps: (1) placing a sample to be tested on an objective table of a metallographic microscope and determining a first test point; (2) adjusting a coarse tuning knob firstly until an objective image can be seen, and then adjusting a fine tuning knob until the objective image is clear; (3) replacing an objective lens with a laser lens; (4) focusing; (5) giving a test so as to obtain grid line height data of the first test point; (6) selecting a second test point, adjusting the fine tuning knob to move the top and bottom ends of the grid line to be within a test visual field range, and giving a test to obtain grid line height data of the second test point; (7) repeating the step (6) for testing multiple points; and (8) performing calculation so as to obtain the average height. The tests show that compared with a conventional method, test time through the method provided by the invention can be shortened by more than 40%, substantial effects are achieved, and the test efficiency is greatly improved.

Description

technical field [0001] The invention relates to a method for measuring the grid line height of a crystalline silicon solar battery sheet, belonging to the technical field of solar batteries. Background technique [0002] Conventional fossil fuels are increasingly depleted. Among all sustainable energy sources, solar energy is undoubtedly the cleanest, most common and most potential alternative energy source. At present, among all solar cells, crystalline silicon solar cells are one of the solar cells that have been widely commercialized. This is due to the extremely abundant reserves of silicon materials in the earth's crust. Cells have excellent electrical and mechanical properties, therefore, crystalline silicon solar cells occupy an important position in the field of photovoltaics. [0003] Grid lines are used to collect photo-generated carriers in crystalline silicon solar cells, and their role is very great. For P-type crystalline silicon solar cells, the generation o...

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Problems solved by technology

[0005] However, the above method has the following problems: ① the above steps (2) and (4) need to spend a lot of time, especially step (4), the top and bottom of the grid line need to be focused twice, for ordinary analysts Generally speaking, each focusing operation takes about 1 minute, even for a skilled analyst, it takes 20-30 seconds; therefore, the entire detection process takes too much time and reduces the test efficiency; Perform the replacement of the laser lens in step (3) again, which not only causes complicated operations, but also easily causes the risk of lens damage during the replacement process

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