What is a PV backsheet?

A PV backsheet is a special layer that covers the back of a solar panel. Its primary role is to protect the solar cells and internal components, enhancing the panel’s performance and extending its lifespan. Typically, backsheets are made from multiple layers of composite materials, including polymers, fluoropolymers, and polyester.

How does a conductive sheet work?

The conductive sheet allows the DC energy to flow between solar cells, increasing the voltage and allowing for the connection of CdTe panels into photovoltaic (PV) systems. These layers require the deposition of a metal layer or carbon paste, introducing copper (Cu) to create conduction in the panel.

What are PV backsheets made of?

Typically, backsheets are made from multiple layers of composite materials, including polymers, fluoropolymers, and polyester. Protection: The primary function of a PV backsheet is to protect the internal components of the solar panel.

Why do photovoltaic modules need a backsheet?

In photovoltaic modules, moisture accumulation can lead to the corrosion of metal parts. Backsheets act as a preventive mechanism to stop moisture and minimize the possibility of insulation degradation, short-circuiting, and corrosion of electrical connections or components.

How does a photovoltaic cell work?

The back contact or conductive sheet is directly placed on top of the substrate, before placing the photovoltaic material. This layer is made by placing molybdenum (Mo) through DC sputtering, resulting in a highly reflective and conductive film working as the main contact for the cell.

What is a photovoltaic cell?

They are composed of multiple thin layers of photovoltaic, or PV, materials. The layers are roughly 300 to 350 times thinner than standard silicon, which makes the technology ideal for portable devices. Each cell is made of three main parts: photovoltaic material, a conductive sheet and a protective layer.