Refinement of the Co-Content function, through an integration of a polynomial fit of $$I-{I}_{sc}$$. Part 2 application to experimental current–voltage curves

Abstract In this article Part 2 of this series of articles, the methodology proposed in Part 1, namely, the fitting to a polynomial of the current minus the short-circuit current, i.e., $$I-{I}_{sc}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>I</mml:mi> <mml:mo>-</mml:mo> <mml:msub> <mml:mi>I</mml:mi> <mml:mrow> <mml:mi>sc</mml:mi> </mml:mrow> </mml:msub> </mml:mrow> </mml:math> , to calculate the Co-Content function $$\left(CC\left(V,I\right)\right)$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mfenced> <mml:mi>C</mml:mi> <mml:mi>C</mml:mi> <mml:mfenced> <mml:mi>V</mml:mi> <mml:mo>,</mml:mo> <mml:mi>I</mml:mi> </mml:mfenced> </mml:mfenced> </mml:math> and extract the five solar cell parameters, i.e., the shunt resistance $$\left({R}_{sh}\right)$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mfenced> <mml:msub> <mml:mi>R</mml:mi> <mml:mrow> <mml:mi>sh</mml:mi> </mml:mrow> </mml:msub> </mml:mfenced> </mml:math> , the series resistance $$\left({R}_{s}\right)$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mfenced> <mml:msub> <mml:mi>R</mml:mi> <mml:mi>s</mml:mi> </mml:msub> </mml:mfenced> </mml:math> , the ideality factor $$\left(n\right)$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mfenced> <mml:mi>n</mml:mi> </mml:mfenced> </mml:math> , the light current $$\left({I}_{lig}\right)$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mfenced> <mml:msub> <mml:mi>I</mml:mi> <mml:mrow> <mml:mi>lig</mml:mi> </mml:mrow> </mml:msub> </mml:mfenced> </mml:math> , and the saturation current $$\left({I}_{sat}\right)$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mfenced> <mml:msub> <mml:mi>I</mml:mi> <mml:mrow> <mml:mi>sat</mml:mi> </mml:mrow> </mml:msub> </mml:mfenced> </mml:math> , (within the one-diode solar cell model), is implemented on reported Current–Voltage ( IV ) curves found in the literature, both for laboratory made solar cells, as for and single-crystalline silicon (x-Si), multi-crystalline silicon (m-Si), cadmium telluride (CdTe), copper indium gallium selenide (CIGS), amorphous silicon (a-Si) tandem and triple-junction, amorphous silicon/crystalline silicon, heterojunction with intrinsic thin-layer (HIT), and amorphous silicon/microcrystalline silicon photovoltaic modules.