And the blinky light project remains a valuable teaching ... a Master’s degree course and began with a slice of epitaxial wafer that goes through cleaning, annealing, and acid etching steps ...

The big question is how much further can the technology be pushed ... is projected onto a silicon wafer, which is coated with a light-sensitive material known as a photoresist.

Researchers in Saudi Arabia have built a perovskite-silicon tandem cell with textured silicon wafers to offer superior light trapping. The device has an open-circuit voltage of 1,851 mV ...