1. Introduction The screen-printed aluminum back surface field (BSF) formation has been the preferred method in the photovoltaic (PV) industry for the back surface passivation of p-type Si solar cells. Theoretical calculations show that Al-BSF has the potential to provide high-quality back surface passivation .
In this work, we have studied aluminium BSF on industrial silicon solar cells with back parasitic junction. Thickness of the BSF has been measured by SIMS and confronted with the theoretical expected value and simulations.
Abstract: Screen-printing and rapid thermal annealing have been combined to achieve an aluminum-alloyed back surface field (Al-BSF) that lowers the effective back surface recombination velocity (S/sub eff/) to approximately 200 cm/s for solar cells formed on 2.3 /spl Omega/-cm Si.
1. Introduction With the reduction of solar cells thickness, back surface field (BSF) becomes more and more interesting in order to decrease the back surface recombination velocity and to increase collection efficiency.
CONCLUSION In this paper we show that with a simple setup the well known LFC process can be used to fix aluminum foil successfully and reliably on solar cell rear sides. The achieved adhesion is sufficient when applying new interconnection approaches along the whole width of the cell.
... Conventional c-Si solar cells mostly have a fully-screen printed aluminum (Al) on back surface which possesses a high surface recombination velocity if not a highly doped p + region is created on the rear surface of the solar cell to minimize the recombination .