1. Substitute beer and pizza?

2. Basic Silicon Solar Cell Schematic

3. The process begins with a silicon wafer, (100) orientation, PRIME grade, 1-20 ohm- cm resistivity

5. Using a spin on liquid phosphorus film as a dopant source, a n-region is diffused into the silicon wafer at 950C

9. A metal film is evaporated on the top surface and a photolithographic mask creates a conductive grid in the metal

15. A second metal film is deposited on the back for backside contact

17. Using PECVD (plasma enhanced chemical vapor deposition) a anti-relective coating of SiO2 is deposited on the top surface

19. Individual cells are diamond saw cut from the wafer

21. Electrical testing (I-V trace) of the cell is performed under a solar light simulator

24. Completed Solar Cell

26. Assignment Lecture 4 assignment from web site