研究目的
Investigating the use of intermediate distributed Bragg reflectors (DBRs) in GaInP/GaInAs/Ge triple-junction solar cells (TJSCs) for spectrum splitting applications to improve photovoltaic conversion efficiencies.
研究成果
The integration of distributed Bragg reflectors in lattice-matched and metamorphic triple-junction solar cells can act as a band-reflect filter to spectrum split otherwise wasted IR light to a Si solar cell. This approach does not require external optical filters and exhibits a greatly reduced sensitivity to angles of incidence compared with dielectric filter designs, potentially enhancing the benefits of spectrum splitting.
研究不足
The study focuses on the optical modeling and reflectance measurements of TJSCs with integrated DBRs. The practical implementation and manufacturing constraints of integrating DBRs into TJSCs are not extensively discussed.
1：Experimental Design and Method Selection:
Optical models for both commercial lattice-matched (LM) and metamorphic (MM) GaInP/GaInAs/Ge triple-junction solar cells (TJSCs) were developed. The spectral reflectance of a LM and a MM GaInP/GaInAs/Ge TJSC was measured using a Perkin-Elmer Lambda 1050 UV-Vis-NIR spectrophotometer with Universal Reflectance Accessory (URA) at 8° angle of incidence. Optical analysis software WVASE? was used to develop optical models for the TJSCs and fit the modelled reflectance to the measured data.
2：Sample Selection and Data Sources:
Samples included a LM TJSC and a MM TJSC from Azur Space.
3：List of Experimental Equipment and Materials:
Perkin-Elmer Lambda 1050 UV-Vis-NIR spectrophotometer with Universal Reflectance Accessory (URA), optical analysis software WVASE?.
4：Experimental Procedures and Operational Workflow:
The spectral reflectance was measured and optical models were developed to match the measured data. The effect of integrating a DBR structure into the TJSC was analyzed.
5：Data Analysis Methods:
The optical models were used to analyze the reflectance and the potential for spectrum splitting.
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