研究目的
To characterize the performance of bifacial photovoltaic modules, including optical transmittance, temperature coefficients, and internal quantum efficiency distribution to predict real power production under operating conditions.
研究成果
The study successfully characterized the performance of bifacial solar cells, showing full absorption of sunlight irradiance in the wavelength range of 400-1100 nm. The temperature coefficients of Isc, Voc, and power were determined. LBIC results indicated minimal effect of local recombination on light-induced current at surface and bulk.
研究不足
The study focuses on bifacial perc solar cells and may not be directly applicable to other types of solar cells. The experimental conditions were controlled, which may differ from real-world operating conditions.
1：Experimental Design and Method Selection:
The study involved measuring optical transmittance for front and back side illumination, obtaining temperature coefficients, and measuring internal quantum efficiency distribution via two-dimensional LBIC method.
2：Sample Selection and Data Sources:
P-type bifacial perc solar cells prepared in industrial fabrication lines with a wafer size of 156mm × 156mm were used.
3：List of Experimental Equipment and Materials:
Solar simulator for spectral irradiance, LBIC system for quantum efficiency distribution measurement.
4：Experimental Procedures and Operational Workflow:
Optical transmittance measurements were carried out with solar simulator spectral irradiance onto the bifacial solar cells. The photo current, voltage, and power versus temperature characteristics were measured under 1-sun solar simulator radiation. IQE and EQE distribution was measured via two-dimensional LBIC method.
5：Data Analysis Methods:
The CTs of Isc, Voc, and power were determined by fitting method. The spatial distribution of defects was identified by LBIC.
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