Environment
Passivated Emitter and Rear Cell technology
Basics
- Unlike conductors such as metals, semiconductors are not able to conduct current.
- This is because they have no free electrons.
- The most common material used in semiconductors is silicon which only conducts electricity under certain conditions.
- To change this a small amount of energy can be put into the system. This frees the electrons.
- It is possible to make semiconductors better using a process called doping.
- There are 2 different types of doping. In both cases a different material is added to the crystal.
- The 2 types are called n-doping and p-doping
Standard Solar panel
- A standard solar panel cell contains two layers of silicon, commonly called “n-type” and “p-type” for their negative and positive charge behavior.
- A solar panel creates electricity when sunlight hits the solar cells, knocking electrons loose from the n-type layer as the p-type layer accepts them, creating an electric field.
Standard Solar panel-Issues
Passivated Emitter and Rear Cell technology
- is a new technology aimed to achieve higher energy conversion efficiency by adding a dielectric passivation layer on the rear of the cell.
The dielectric passivation layer contributes to the increase of efficiency by:
