A Selection Method of Optimal External Series Resistance for Solar Cells Used in Irradiation Sensors
A technology of solar cells and series resistors, applied in the field of photovoltaic systems, can solve problems such as the inability to reflect the influence of radiation spectrum differences on photovoltaic power generation, and achieve the effect of ensuring accuracy
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[0029] The present invention will be further described in detail in conjunction with the accompanying drawings and specific embodiments.
[0030] like Figure 4 As shown, on the volt-ampere characteristic curve of the solar cell, when the load resistance R L for a certain value R m , get a point M on the curve, so that the corresponding operating current I m and working voltage U m The product (power) of is the largest, then the I at this time m is the best working current, U m For the best working voltage, R m is the best load resistance.
[0031] in,
[0032]
[0033] Among them, I ph is the photogenerated current of the solar cell; I 0 is the pre-exponential factor related to the dark current; q is the unit charge; A is the diode factor; k is the Planck constant; T is the absolute temperature of the PN junction of the solar cell.
[0034] Coefficient I 0 , A, k, T are determined by the structure of the solar cell itself.
[0035]
[0036] In the prior ar...
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