EPS 7 Lecture Notes - Lecture 33: Radiant Flux, Polycrystalline Silicon, Ingot
21 Jul 2018
School
Department
Course
Professor
Document Summary
Solar power: ready to save the day: sio2 o2 + si in a furnace, to make a thin wafer of silicon, first melt the silicon chunks, then either let the liquid freeze in the container, (polycrystalline silicon) Close up of a polycrystalline pv panel: or grow a single crystal out of the melt. Silicon ingot, a single crystal that can be sliced to make wafers: thin film, mono silicon, polysilicon. Solar cells, also known as photovoltaic cells, or pv cells, convert sunlight directly to electricity. A light-emitting diode (led) can convert light to electricity. Led and pv work on the z same principle. There is a layer of silicon connected to wires and that layer forces electrons to move one way only. But, due to absorption and scattering, average isolation at the ground is roughly 1000. High latitudes get less sunlight per ground area. But we can just tilt the pv panels.
