Development of bifacial n-type solar cells for industrial application
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COMPARISON OF BIFACIAL AND MONOFACIAL LARGE-AREA n-TYPE SI SOLAR CELLS FROM 100 μm THIN WIRE-SAWN WAFERS
Reducing wafer thickness provides the most effective potential to lower the production cost of c-Si PV modules. Two thin n-type solar cell concepts are compared in terms of their optical and electrical properties: a monofacial device with a full-area metal surface at the rear which is beneficial in particular to such thin solar cells and a very similar but even better industrially applicable bi...
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n-type solar cell concepts increasingly utilize emitter formation by diffusion from boron doped sources. Combining the advantage of n-type silicon material and bifacial cell architecture enables high-efficiency and versatile photovoltaics. In case of boron emitters, it was standard until now to form a metal-semiconductor contact by screenprinting Al containing Ag pastes. Instead of utilizing Al...
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We present industrialized bifacial solar cells on large area (149 cm) 2 cm CZ monocrystalline silicon wafers processed with industrially relevant techniques such as liquid source BBr3 and POCl3 open-tube furnace diffusions, plasma enhanced chemical vapor deposition (PECVD) SiNx deposition, and screen printed contacts. The fundamental analysis of the paste using at boron-diffused surface and the...
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The multi-busbar solar cell concept using a multitude of wires instead of few busbars is a promising candidate for large scale industrial application for several reasons: it can be combined with the probably upcoming dielectrically passivated back side (PERC) and bifacial concepts, uses less silver and allows for smaller fill factor losses when embedded in a module. However, the electrical char...
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