研究目的
Investigating the development of highly reflective back contacts (RBCs) for ultrathin CIGS solar cells to improve light absorption and efficiency.
研究成果
The development of RBCs with a ZnO:Al/ITO bilayer on a silver mirror significantly improves the efficiency and short-circuit current of ultrathin CIGS solar cells, demonstrating the importance of the ZnO:Al layer for thermal stability and performance.
研究不足
The study highlights the need for a ZnO:Al layer to prevent shunting behavior in solar cells with Ag/ITO back contacts, indicating a limitation in the thermal stability of such contacts without the ZnO:Al layer.
1：Experimental Design and Method Selection:
Two architectures of RBCs were compared, one with a single layer of ITO and another with a bilayer of ZnO:Al/ITO on a silver mirror.
2：Sample Selection and Data Sources:
Ultrathin CIGS solar cells were fabricated on soda lime glass substrates with conventional Mo back contacts and the two types of RBCs.
3：List of Experimental Equipment and Materials:
SEM for morphology analysis, GD-OES for depth profiling, and IV and EQE measurements for performance evaluation.
4：Experimental Procedures and Operational Workflow:
RBCs were prepared, followed by CIGS coevaporation, and completion of solar cells with CdS, i-ZnO, and ZnO:Al layers.
5：Data Analysis Methods:
Optical simulations were performed to compare with experimental EQE measurements.
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