Principle of slicing photovoltaic cell modules

Can cut solar cells be used for shingling and half-Cell photovoltaic modules?

ABSTRACT: This work discusses challenges and advantages of cut solar cells, as used for shingling and half-cell photovoltaic modules. Cut cells have generally lower current output and allow reduced ohmic losses at the module level.

What are the characteristics of a solar cell?

The solar cell has four corners with defects, and the cutting is a vertical quarter cut (as shown in the Fig. 2 ). The special characteristic of monocrystalline silicon solar cell causes the upper and lower cell’s area will be slightly smaller than 1/4 of the normal solar cell. At the same time, the solar cells are set in series.

Does cutting silicon solar cells reduce Ohmic losses?

Cutting silicon solar cells from their host wafer into smaller cells reduces the output current per cut cell and therefore allows for reduced ohmic losses in series interconnection at module level. This comes with a trade-off of unpassivated cutting edges, which result in power losses.

How does Gridmaster simulate a solar cell?

Gridmaster fundamentally uses the two-diode model to simulate the I – V performance of a solar cell. The parameters of the two-diode model are given by the user or derived from a set of geometrical and electrical input parameters, e.g., number of electrode fingers, busbars, and their conductivities.

How does laser scribing affect solar cell performance?

A conventional cutting process is laser scribing, followed by a mechanical breaking process. This laser scribing method requires a deep scribing of approx. 30%-50% of the wafer’s thickness and causes a significant damaging of the solar cell edge in combination with microcracks. Both have a negative effect to the performance of the cell.

Does uneven radiation affect the performance of a solar cell?

As we know, under concentrated condition, the incident energy flow density on the surface of the solar cell will be significantly increased, and the influence of the uneven radiation on the performance of the solar cell will be gradually highlighted ( Jakhar et al., 2016 ).