What is the effect of series resistance of a solar cell?

What is the effect of series resistance of a solar cell?

The main impact of series resistance is to reduce the fill factor, although excessively high values may also reduce the short-circuit current. Schematic of a solar cell with series resistance.

How does the series resistance and shunt resistance of solar cell affect the FF?

Low shunt resistance causes power losses in solar cells by providing an alternate current path for the light-generated current. Such a diversion reduces the amount of current flowing through the solar cell junction and reduces the voltage from the solar cell.

How does series resistance affect the conversion efficiency of a photovoltaic cell?

Increasing the shunt resistance (Rsh) and decreasing the series resistance (Rs) lead to a higher fill factor, thus resulting in greater efficiency, and bringing the cell’s output power closer to its theoretical maximum. Typical fill factors range from 50% to 82%. The fill factor for a normal silicon PV cell is 80%.

How is the internal resistance of a solar cell determined?

Measurements: When carrying out this experiment I will be recording the current using an ammeter and the voltage using a voltmeter. This is all the information needed to find the internal resistance of the solar cell. This is because you can find the internal resistance by using the equation E=V+Ir.

What is the origin of shunt resistance in solar cell?

Shunt resistance is due to non-idealities, mainly impurities near the p-n junction, which cause partial shorting of the junction. That is, if an impurity can join the front and back sides of the solar cell then it is responsible for shunt resistance.

What is fill factor of a PV cell?

The Fill Factor is essentially a measure of the efficiency of a PV module, the theoretical maximum value depending on factors such as the type of silicon used to construct the module. However, deviation from the expected value or changes in Fill Factor can provide an indication that a fault is present.

How are series resistance effects on solar cell measurements?

Series Resistance Effects on Solar Cell Measurements 459 It is derived from equation (1) for the photovoltaic output characteristic by setting I = 0 and replacing V by the open circuit voltage VO. In this case the term containing the internal series resistance Rs vanishes.

How does series resistance affect the short circuit?

The short circuit current (I SC) is unaffected b the series resistance until it is very large. Series resistance does not affect the solar cell at open-circuit voltage since the overall current flow through the solar cell, and therefore through the series resistance is zero.

What is the effect of both series and shunt resistances?

In the presence of both series and shunt resistances, the IV curve of the solar cell is given by; and the circuit diagram of the solar cell is given as; Parasitic series and shunt resistances in a solar cell circuit.

How does series resistance affect the fill factor?

The effect of series resistance on fill factor. The area of the solar cell is 1 cm 2 so that the units of resistance can be either ohm or ohm cm 2. The short circuit current (I SC) is unaffected b the series resistance until it is very large.