研究目的
To design a holographic diffraction grating‐based spectrum‐splitting photovoltaic module integrating eight III‐V compound semiconductor cells as four dual‐junction tandems for high‐efficiency solar energy conversion.
研究成果
The design of a holographic diffraction grating‐based spectrum‐splitting concentrating photovoltaic module incorporating four dual‐junction tandem III‐V solar cells achieves a simulated module efficiency of 33.2%. Addressing the dispersion issue is identified as the main barrier to higher module efficiency for holographic spectrum splitting systems.
研究不足
The main limitations include the dispersion in the splitting optics limiting module efficiency, the complexity and cost of manufacturing, and the need for high‐quality cells with a dispersion reducing strategy.
1：Experimental Design and Method Selection:
The design incorporates optical elements to separate sunlight into frequency bands targeted at solar cells with optimized bandgaps. The methodology includes the use of holographic diffraction gratings for spectrum splitting and concentration.
2：Sample Selection and Data Sources:
The study uses III‐V compound semiconductor cells and the AM1.5D spectrum for simulations.
3：5D spectrum for simulations.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Includes dichromated gelatin (DCG) as the holographic recording medium, III‐V semiconductor alloys for solar cells, and optical adhesive for encapsulation.
4：Experimental Procedures and Operational Workflow:
Involves the fabrication of holographic gratings, their characterization using spectroscopic ellipsometry, and the assembly into grating stacks.
5：Data Analysis Methods:
Utilizes generalized coupled‐wave analysis for simulating diffraction efficiency and detailed balance models for cell performance optimization.
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