研究目的
Investigating the effect of nonuniform horizontal temperature distributions on the photovoltaic output parameters of a monocrystalline silicon solar cell.
研究成果
The nonuniform temperature distribution influences the photovoltaic effect negatively. The open-circuit voltage, maximum output power, output current, and power with an external load resistance of 1 X decrease with the temperature difference between the center and edge region of the solar cell. The photovoltaic efficiency decreases when the temperature distribution is nonuniform.
研究不足
The study focuses on the effect of nonuniform temperature distributions on photovoltaic output parameters under controlled conditions, which may not fully represent real-world applications where other factors like humidity and wind speed can also affect performance.
1：Experimental Design and Method Selection:
A laser beam irradiated on the center of the cell surface was used to obtain nonuniform temperature distributions. The solar cell was placed in a vacuum environment to avoid heat convection.
2：Sample Selection and Data Sources:
A monocrystalline silicon solar cell wafer of (30 × 30) mm2 area and (200 ± 20) μm thickness was used as an experimental subject.
3：List of Experimental Equipment and Materials:
A solar simulator, a vacuum thermostat, a laser device emitting 1064 nm wavelength and 500 μm diameter infrared light, and a Keithley 2450 meter were used.
4：Experimental Procedures and Operational Workflow:
The temperature distribution of the solar cell was measured using five thermocouples distributed on the back surface of the solar cell equidistantly. The photovoltaic parameters under different nonuniform distributions were measured.
5：Data Analysis Methods:
The variation of photovoltaic parameters including short-circuit current, open-circuit voltage, and output power was analyzed under different temperature distributions.
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