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Few Minutes Series-Environment(01 April)

By April 1, 2022April 5th, 2022Environment & Disaster Management

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.

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Standard Solar panel-Issues

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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.