In the literature on solar cells,the relationship curve of output current versus output voltage and the relationship curve of output power versus output voltage are generally given. However,it is rare to see the relationship curve of output voltage versus load resistance,the relationship curve of output current versus load resistance,and the relationship curve of output power versus load resistance. These curves are studied experimentally and theoretically here. The results of experimental tests and theoretical calculations are quite consistent.Both of them show that,for a determined solar cell circuit,with the increase of load resistance,the output voltage monotonically increases and the output current monotonically decreases. However,the output power does not change monotonically,there is an optimal power value.This optimal power value corresponds to an optimal load resistance value.In addition,we have also studied the impact of incident light intensity on the output voltage,output current and output power of solar cells,and found that all these outputs increase with the increase of light intensity.The results of this work are of great significance in the design and application of solar cell circuits.
关键词
大学物理实验/太阳能电池/负载特性/最佳输出功率/最佳负载电阻
Key words
college physics experiments/solar cell/load characteristics/optimal output power/optimal load resistance
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