1. Generally, the effective light level should be above 200W/㎡. Light intensity and short circuit current are basically linear. Of course, solar cells can be short-circuited. The principle is different from that of ordinary batteries. They do not generate electrical energy through internal reactions. It is simply a device that converts incident light into electrical energy. intermediate conversion device.
The elimination method is as follows:
1. Keep the light intensity unchanged When measuring the basic characteristics of solar cells, use a stable light source and maintain the distance between the light. Constant source and solar cell, ensuring that the light intensity remains constant during the measurement process.
2. Keep the temperature constant. Since the performance of solar cells changes with temperatureTemperature, solar cells and test instruments should be placed in the same environment for a certain time before measurement to allow them to reach a constant temperature. stable state. Then take the measurement.