Why do solar cells have a dark JV curve?

Up to the knee voltage several processes contribute to the current density, which is completely overshadowed when the cell is operated in illuminated conditions. From this dark JV curve, we can for instance determine the shunt resistance of the solar cell with better accuracy than with the same curve measured under 1 sun illumination.

Why are dark IV curves used in solar cell analysis?

The use of Dark IV curves in solar cell analysis relies on the principle of superposition. That is, in the absence of resistive effects, that the light IV curve is the dark IV curve shifted by the light generated current. While this is true for most cells it is not always the case.

Why do solar cells need dark and illuminated conditions?

1. Introduction The I–V characteristics of solar cells measured under dark and illuminated conditions provide an important tool for the assessment of their performance. The dark characteristics are the easiest way to estimate the quality of the junction and the grid and contact resistances.

Which model is used to describe the dark I-V curves of a PV cell?

The 2-diodes model is used to describe the dark I-V curves of the PV cell . (1) to a set of measured data using a nonlinear squares method of dark I-V measurement data. The current-voltage (I-V) curve for each component cell in the PV module is characterized by PV cell specific parameters' values.

Can dark JV measurements be used for thin-film silicon solar cells?

Finally we have discussed another application of the dark JV measurements specifically for thin-film silicon solar cells, where the temperature dependence of the dark current is used to determine the mobility gap of the solar cell.

Can a poly-Si solar cell be used under dark condition?

These techniques have been adequately modified, extended to cover the case of solar cells and used to extract the parameters of interest from experimental I-V characteristic of a Poly-Si solar cell under dark condition.