Photovoltaic solar cell transient photovoltage automatic test system and test method

Abstract

The invention relates to a transient-state photovoltage full automatic test system and test method for a photovoltaic solar battery. The full automatic test system is characterized by comprising a photovoltaic battery clamp used for fixing a to-be-tested photovoltaic battery device, a steady-state light source for generating a steady-state photovoltage signal in the interior of the to-be-tested photovoltaic battery device, a transient-state pulse light source for generating a transient-state photovoltage signal in the interior of the to-be-tested photovoltaic battery device, a light path control switch for cutting off or connecting transient-state pulse light irradiation, a light intensity regulation unit used for regulating the light intensity of the transient-state pulse light source, atransient-state signal collecting and recording unit for collecting a steady-state photovoltage change signal and a transient-state photovoltage change signal in real time, and a computer used for adjusting the light intensity of the steady-state light source and the transient-state pulse light source in real time according to the steady-state photovoltage change signal and the transient-state photovoltage change signal and recording a complete transient-state photovoltage signal attenuation curve so as to realize full automatic data acquisition. The full automatic test system and test methodcan be widely applied to the technical field of the photovoltaic semiconductor.

Description

technical field [0001] The invention relates to a full-automatic testing system and testing method for the transient photovoltage of photovoltaic solar cells, belonging to the technical field of photovoltaic semiconductors. Background technique [0002] The development and progress of human society are inseparable from the continuous consumption of energy. With the gradual acceleration of historical development, people's demand for energy is increasing day by day. The rough utilization mode of fossil energy not only has low energy utilization rate but also causes serious environmental problems. Pollution forces current people to find clean, friendly and sustainable new energy sources as soon as possible. Photovoltaic solar cells, which can directly convert solar energy into electrical energy through the photovoltaic effect, have become one of the most promising new energy sources. At present, solar cells have undergone several generations of innovations, from silicon semicon...

AI Technical Summary

Problems solved by technology

[0004] At present, the methods developed to study the defect state properties of photovoltaic solar cells and the carrier recombination process include intensity-modulated photocurrent and photovoltage spectroscopy, electrochemical impedance spectroscopy, and time-resolved photocurrent and photovoltage spectroscopy. Among them, intensity-modulated photocurrent and photovoltage spectroscopy And electrochemical impedance spectroscopy belongs to the frequency domain measurement method, requiring technicians to have a solid theoretical foundation of dielectric physics, the data processing and analysis process is complicated, especially the electrochemical impedance spectroscopy needs to build a model circuit, the choice of the model circuit greatly affects the experimental results. The understanding and recognition of observational phenomena that raise the technical bar significantly for the method

The time-resolved photocurrent and photovoltage spectroscopy belong to the time-domain measurement method, the measurement results and data analysis and processing are intuitive and easy to understand, and easy to use, but this method needs to constantly change the steady-state conditions, and each steady-state condition corresponds to a similar There are a lot of tedious and repetitive tasks in the data acquisition operation, which greatly reduces the work efficiency of technicians and wastes valuable technical resources

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