Carriers key for quality cell surfaces
The path to lower solar LCOE can be painful; just ask a PV manufacturer. However, ever-larger crystalline wafers may cause more pain than they are worth, argues Gerry Knoch, the managing director of wet bench provider exateq. For high efficiency, eliminating cross contamination in wet processes is vital and can be achieved – with carriers playing an important role.
Whether ongoing progress with p-type PERC, a shift to n-type TOPCon, or a switch to heterojunction (HJT), high-efficiency PV cell production requires one thing: clean wafer surfaces and the minimizing of cross contamination in wet chemistry processes. This, at least, is the experience of Gerry Knoch, the PV industry veteran leading Germany-based exateq GmbH. And …
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