The measurement of irradiance is a crucial aspect in the characterization of solar cells, as it quantifies the amount of energy input, a portion of which is converted into electricity within the solar cell. On this basis, we determine the conversion efficiency, which is one of the most significant parameters of solar cells. Measurements of irradiance are typically performed with a reference solar cell calibrated to the AM1.5 reference solar spectrum. However, when using solar cells indoors, the lighting conditions are entirely different, as sunlight mixes with artificial light sources.
For the purpose of measuring ambient light indoors, I developed a measurement system that enables reliable and accurate measurement of ambient light. During the system design process, I chose components such as sensors for measuring the photometric illuminance in lux and photodiodes for measuring the radiometric irradiance in W/m². I designed the system with the Altium Designer software. The control of the measurement device is carried out through the MiŠKo 3 development microcontroller board using the STM32CubeIDE programming environment. All measurement results are displayed on the screen.
The developed measurement system enables accurate measurement of ambient light for the characterization of perovskite solar cells under indoor operating conditions.
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