Multi-junction solar cell and AC electroluminescence testing method and device of each sub cell

Abstract

The invention discloses a multi-junction solar cell and AC electroluminescence measuring method and device of each sub cell, relating to a solar cell AC electroluminescence test. The testing device is provided with an AC drive circuit, an optical module, a vidicon, a spectrograph and a computer. The output end of the AC drive circuit is connected with a solar cell array; the optical module is provided with a filter plate, a battery of lens and a speculum; the filter plate, the battery of lens, the speculum and the vidicon are on the same optical axis; reflecting beams of the speculum are transmitted to the receiving port of the spectrograph; and the output end of the vidicon is connected with the computer. A multi-junction solar cell sample is put on a sample table; the spectrograph is utilized to measure the electroluminescence light spectrum of the multi-junction solar cell to obtain the light-emitting band of each subjunction; a tested light spectrum is selected by the filter plate; the testing range of the cell sample is selected to obtain an AC electroluminescence image; and the computer processes data to obtain the information of the process injury and crystalline material defect of the solar cell and each sub cell component thereof.

Description

technical field [0001] The present invention relates to a solar cell AC electroluminescence test, in particular to a multi-junction solar cell and each sub-battery AC electroluminescence test method and device, mainly by establishing a joint system of electroluminescence spectrum and spectroscopic imaging to realize the detection of each sub-cell Detection of material defects and device process damage. Background technique [0002] At present, under the double pressure of the depletion of non-renewable mineral energy such as oil and coal and the increasingly serious environmental pollution, more and more countries have begun to implement the Sunshine Plan to develop solar energy, a pure natural energy with large reserves, wide areas, and clean energy. Renewable and other advantageous resources. As a feasible and effective method of utilizing solar radiation energy, solar cells have opened up broad prospects for human beings to utilize solar energy extensively. With the imp...

AI Technical Summary

Problems solved by technology

However, its test time is long, and it is mainly used for single-junction solar cells, and it is impossible to understand the information of each sub-cell of multi-junction solar cells

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