The experiment below is about finding the maximum power by connecting a variable resistor to the solar cell, recording current and voltage and repeating this for many resistor settings. Divide the name plate rating by the square meters at 1000 W/m² to get the solar panel efficiency. We will also explore I-V curves under different excitation intensities. The design parameters to be varied in this lab are doping levels of the substrate and the refractive index/thickness of antireflection coating. We can then find the maximum power as the product of power and voltage. 3.003 Lab 4 Simulation of Solar Cells Objective: To design a silicon solar cell by simulation.
To find the point where the solar cell produces the maximum power, we therefore need to expose the solar cell to many different loads and measure current and voltage. If you know I SC there is a current, but the voltage is now 0, so the power is again 0.
At V OC we have a voltage, but the current is zero, so the power is also zero. Since P = IV (the power is equal to current times voltage) we can calculate the power in both situations. The short circuit current measured in this context is called I SC and is the maximum current that the solar cell can deliver.
#Solar cell efficiency calculation pc1d series#
The situation reached by infinite load is a short circuit of the system and is precisely the state you measure when you connect an ammeter to the solar cell to measure the current. The data include: i) PC2D simulations on J 02, ii) the calculation of series resistance and back surface recombination velocity (BSRV) on the rear side metallization of PERC cell for the case of a point contact, and iii) the PC1D simulation on the cumulative photo-generation and recombination along the distance from the front surface. At a higher load, the voltage will drop until the load is infinitely high. In other words, this voltage is the maximum voltage the solar cell is capable of delivering. When measuring the voltage with a voltmeter directly over the solar cell contacts, you measure V OC, which is the voltage of the unloaded circuit. To describe the efficiency of a solar cell, it is not enough to measure what voltage and current it produces without load. This is the simplest way to get any solar PV module’s efficiency.
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