Transient photoelectric testing device of solar cell

Abstract

The invention provides a transient photoelectric testing device of a solar cell, and belongs to the technical field of photoelectric performance testing of the solar cell. The transient photoelectric testing device of the solar cell comprises a stabilized voltage supply, a light source system and a measuring circuit module. The semiconductor laser emits transient pulse light towards the solar cell after the solar cell generates photovoltage, so that transient excitation is performed on the solar cell, the solar cell is excited to provide perturbation signals, excited carriers in the solar cell can provide transient photovoltage to the outside in the transient process, and the transient pulse light is generated. The measuring circuit module is used for detecting time-varying signals of photovoltage and photocurrent excited at the two ends of the solar cell, so that the measuring circuit module measures open-circuit voltage and short-circuit current of the solar cell respectively; and carrier dynamics and ion migration measurement of the solar cell under different steady-state illumination conditions can be realized.

Description

technical field [0001] The invention relates to the technical field of photoelectric performance testing of solar cells, in particular to a transient photoelectric testing device for solar cells. Background technique [0002] Solar cells are the main body in the development of new energy in my country, so the photoelectric conversion efficiency of solar cells directly determines their power generation capacity. The effect of ion migration in the battery is becoming more and more pronounced. Current detection techniques lack the means to directly test ion mobility. [0003] In order to detect ion migration in solar cells, a transient test method based on solid-state lasers has been developed internationally. However: 1. The solid-state laser is expensive and complicated to maintain, and is not suitable for large-scale industrial production; 2. The output optical power of the solid-state laser is extremely high, and its transient process is enough to make the solar cell in a ...

AI Technical Summary

Problems solved by technology

In the above patents, a fixed laser is used to detect solar cells, but solid-state lasers are expensive and complicated to maintain, and are not suitable for large-scale industrial production applications. The output power of solid-state lasers is extremely high, and its transient process is sufficient to saturate solar cells. Excitation state, difficult to achieve perturbation transient detection

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