OPVAP
 Open Photovoltaics Analysis Platform Free for Research

 +1 demo: Basic page

Input

Illumination Area: (default 1, unit: cm^2)
Illumination Power: (default 100, unit: mW/cm^2)

Please copy your two columns Voltage-Current data below
Attention: the default units of two columns are (V, mA) and NO title be included such as (voltage current) at the top of columns. (Example of data download)

Please click this button, when it does not work well or you have question .
Here are several methods to caculate Rs, Rsh, n, j0 and Jph

The Result

 Jsc=mA/cm^2 Voc=V FF= Eff=%

Please type your email and then click the button 'Iterative methods' to obtain parameters.
 Inverse of slope 5 Iterative methods (see Refs) Series Reisitance Rs (ohm.cm^2) The 5 Iterative Methods need to be run on the local CLUSTER, since this server cannot support high speed calculation. To use this function, you need paste your IV data and type your email address above, and then click the button 'Iterative methods' Shunt Resistance Rsh (ohm.cm^2) Ideality factor N/A Saturation current of diode J0 (mA/cm^2) N/A Photocurrent Jph (mA/cm^2)

Please contact us if you have any question about this function here

I-V Curve (reference Wikipidia)

Current–Voltage characteristic (I-V curve) is a relationship, typically represented as a chart or graph, between an electric current and a corresponding voltage, or potential difference. Sometimes, I is replaced by J, namely J-V curvre, which J is current density = I/A, where A is area.

Scientists use these charts to determine basic parameters of a device and to model its behavior in an electrical circuit. A more general form of current–voltage characteristic is one that describes the dependence of a terminal current on more than one terminal voltage difference. Figure 1 shows an I–V curve for a P-N junction diode. The equivalent circuit of solar cell is based on it but includes more units, such as a current supply, a serial resistance, and parrallel (shunt) resistance. (reference ) . The standard I-V curve of solar cell is shown in Figure 2.

Figure 1. I–V curve of a P–N junction diode (not to scale).

Figure 2 Effect of temperature on the current-voltage characteristics of a solar cell

The methods of Extracting parameters are shown in another page

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