Test method and device for high-light intensity and large-scale solar cell illumination linearity

Abstract

The invention discloses a test method and a test device for high-light intensity and large-scale solar cell illumination linearity, which can accurately test short-circuit current or open circuit voltage illumination linearity when the light intensity variation scale is more than three orders of magnitude and especially under the high light intensity of thousands of solar constants, measurement can be continuously carried out, and light intensity intervals can be freely set. The test device comprises a test light source and a test darkroom, wherein the test light source can generate light pulse; the test darkroom is provided with an orifice window; a light spectrum regulation light filter is arranged behind the orifice window; a beam splitter is aslant arranged; a tested solar cell and a standard solar cell are arranged on the light path of the transmission light of the beam splitter by one group of vertically-arranged neutral attenuation light filters which can be independently moved in or out of the light path; the light path of the reflected light of the beam splitter is provided with a monitoring solar cell through the attenuation light filters; the tested solar cell and the standard solar cell are both fixed on a temperature-control test bench; and the temperature-control test bench is arranged on a guide rail which can cause the temperature-control test bench to move from back and front along the light axis of the light source.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and in particular relates to a method and a device for testing the linearity of illumination of solar cells in a high light intensity range. The high light intensity refers to the light intensity at 1 solar constant (1367W / m 2 ) above the light intensity, the large range refers to the light irradiance change range or the light intensity change range is more than 3 orders of magnitude. Background technique [0002] The change of the slope of the short-circuit current (or open-circuit voltage) of the solar cell with the light intensity variation curve is called the light linearity of the short-circuit current (or open-circuit voltage) of the solar cell. Solar cell light linearity is an important parameter to evaluate the performance of solar cells. For example, the international standard ISO-15387 stipulates that the linearity of the short-circuit current of a standard solar cell within the r...

AI Technical Summary

Problems solved by technology

The light irradiance variation range of all the above methods and systems is difficult to reach more than 3 orders of magnitude, especially when the light linearity test value cannot be obtained when the light intensity is high (such as more than 1 solar constant)

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