A Phase Locked Loop circuit is provided. In certain example embodiments, the front electrode has a textured surface that faces the photovoltaic semiconductor film of the PV device. A multiplier multiplies the values in the coefficient register and data register, with the resulting product being stored in a product register. A tap threshold is set for each active tap. Methods for coating a substrate using these compositions, and substrates coated thereby, are also disclosed, as are additional catalysts useful for the same purpose. A shaft rotation device may engage the lift shaft to rotate the lift shaft and cassette stage in the chamber interior.