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Presentation transcript:

Substitute beer and pizza?

Basic Silicon Solar Cell Schematic

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

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

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

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

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

Individual cells are diamond saw cut from the wafer

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

Completed Solar Cell