研究目的
To develop a model showing how reflection from both the front and back contacts of thermophotovoltaic (TPV) cells affects the system efficiency and to determine the design rules for front grids for TPV cells.
研究成果
The study concludes that high front-grid reflectivity is crucial for TPV efficiency, unlike the situation for solar cells. The optimal grid coverage for TPV efficiency can differ from that for system power, depending on grid reflectivity. The negative effect of low grid reflectivity is mitigated in cells with less sub-bandgap light.
研究不足
The model assumes a unity view factor; no parasitic losses; rectangular grid finger cross sections; complete absorption by the cell of all above-bandgap light incident between the grids; and specular reflectance from the back reflector. These assumptions may not hold in all practical scenarios.
1：Experimental Design and Method Selection:
The study uses a theoretical model to analyze the effects of front and back contact reflection on TPV system efficiency. It assumes a unity view factor; no parasitic losses; rectangular grid finger cross sections; complete absorption by the cell of all above-bandgap light incident between the grids; and specular reflectance from the back reflector.
2：Sample Selection and Data Sources:
The model is applied to single-junction cells with two different bandgaps (0.8 eV and 0.5 eV) under a 1500K black body spectrum.
3：8 eV and 5 eV) under a 1500K black body spectrum.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Not explicitly mentioned.
4：Experimental Procedures and Operational Workflow:
The study involves calculating cell and TPV efficiencies as functions of grid coverage and reflectivity, using the developed model.
5：Data Analysis Methods:
The analysis involves comparing the effects of grid reflectivity and coverage on TPV efficiency and output power.
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