研究目的
Investigating the challenges and methodologies for accurate solar cell measurements at low temperatures for space missions.
研究成果
The cryostat setup at Fraunhofer ISE Callab is effective for solar cell measurements at low temperatures under varying conditions for space missions. Calibration routines and mounting procedures have been developed to ensure accurate measurements, despite challenges like temperature increases due to illumination.
研究不足
The setup requires careful consideration of the thermal contact under vacuum conditions and the spectral transmittance of the Quartz glass window. Temperature increases due to illumination can significantly affect measurements, especially at high intensities.
1：Experimental Design and Method Selection:
The study uses a specially developed cryostat setup for low temperature measurements of solar cells, focusing on mounting procedures, temperature control, and illumination spectrum definition.
2：Sample Selection and Data Sources:
Several hundred triple-junction and component solar cells were measured under various conditions.
3：List of Experimental Equipment and Materials:
A KONTI for Microscopy cryostat cooled with liquid nitrogen, equipped with a Quartz glass window for illumination.
4：Experimental Procedures and Operational Workflow:
Includes mounting solar cells on graphite plates with plastic clamps, adjusting for shading, and measuring temperature uniformity and solar cell performance under illumination.
5：Data Analysis Methods:
Spectral transmittance of the Quartz glass window is considered in EQE and IV measurements, with adjustments for temperature increases due to illumination.
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