What are the parameters of solar cell?

The main parameters that are used to characterise the performance of solar cells are the peak power Pmax, the short-circuit current density Jsc, the open circuit voltage Voc, and the fill factor FF. These parameters are determined from the illuminated J-V characteristic as illustrated in Fig.

What is equivalent circuit of solar cell?

A simple equivalent circuit model for a PV cell consists of a real diode in parallel with an ideal current source. When the leads of the equivalent circuit for the PV cell are shorted together, no current flows in the (real) diode since Vd = 0, so the whole current from the ideal source flows through the shorted leads.

What is the PV equivalent circuit and its parameters?

A PV array consists of many PV modules and a PV module consists of many PV cells connected in series or in parallel. Therefore, an equivalent circuit of the PV cell, which can be expressed as a photodiode with a large p–n junction, can express PV arrays and modules.

What are the two parameters of solar cell?

The basic characteristics of a solar cell are the short-circuit current (ISC), the open-circuit voltage (VOC), the fill factor (FF) and the solar energy conversion efficiency (η). The influence of both the diode saturation current density and of ISC on VOC, FF and η is analyzed for ideal solar cells.

What is JSC and VOC?

A JSC VOC curve1 is a valuable way of looking at an IV curve in the absence of series resistance. To trace a JSC VOC curve, the illumination on a cell is varied and the cell JSC and VOC measured at each illumination level.

What is ISC and VOC?

Modules short circuit current (ISC) and the open circuit voltage (VOC) are fundamental figures in the design of solar systems. The Voc is determining the maximum string length (number of modules in one string), and Isc is required for calculating the maximum current in the string.

What is ideality factor in solar cell?

The ideality factor (also called the emissivity factor) is a fitting parameter that describes how closely the diode’s behavior matches that predicted by theory, which assumes the p-n junction of the diode is an infinite plane and no recombination occurs within the space-charge region.

How pn junction works in solar cell?

A solar cell is essential a PN junction with a large surface area. The N-type material is kept thin to allow light to pass through to the PN junction. When a photon of light is absorbed by one of these atoms in the N-Type silicon it will dislodge an electron, creating a free electron and a hole.

How is solar cell JSC calculated?

If you have the external quantum efficiency (EQE) of your solar cell then you can calculate the short-circuit current (Jsc) by integrating the (EQE(λ)*AM1. 5G(λ)*q*λ/h*c)dλ. Your IV can be obtained: I=Io*(exp(q*V/n*k*T)-1)-Isc (by setting I=0 you can also calculate the Voc=(n*k*T/q)*ln((Isc/Io)+1)).

How do you calculate VOC?

2) Find the voltage across the open circuit which is Voc. Voc = Vth. Resistors and dependent sources or independent shorces 1) Connect an open circuit between a and b. 2) Find the voltage across the open circuit which is Voc.