Crystalline Silicon Cells

Renewable energy wouldn't be possible without vacuum. One example are Photovoltaics (PV) which are best known as a method for generating electrical power by using solar cells to convert energy from the sun into a flow of electrons by the photovoltaic effect.

Application requirements

  • Long maintenance intervals and maximum uptime

  • Carbon free vacuum

  • Simplest on-site maintenance

  • High suction speed and fast pump down

How does it work?

There are various types of solar cell technologies - the major technology is based on crystalline Silicon wafers. These solar cells demonstrate the highest efficiency of all technologies. The major layers are based on Silicon Nitrid but being compiled with different functional layers to further optimize the cell efficiency. Current trend in this market is the optimization of the reflection layers on the rear side of the cell to increase the absorption inside the cell (Passivated emitter rear contact - PERC). A PERC layer is created through an additional film deposition by using either PECVD or ALD process.

New technologies like Heterojunction solar cells are combining advantages of several solar technologies like the decreased material consumption of Thin Film Deposition, with the high efficiency of crystalline silicon cells. The solar wafers are inserted into a vacuum chamber, whereby several PVD and PECVD processes take place to generate a multilayered solar cell. To deposit these layers, a vacuum in the range of 10-3 to 10-5 hPa is needed depending on the process. Due to the large surfaces, a high suction speed is inevitable. This vacuum needs to be clean and carbon free to ensure high quality layers.

Product portfolio

Pfeiffer Vacuum has a complete product portfolio for your system along with a team of experts to find the right solution for your application. We offer dry and oil lubricated pumps and pumping systems with high suction speeds. With our hybrid or magnetic levitated turbopumps we ensure a low base pressure. To guarantee process stability and safety, our pressure gauges and leak detectors are the right choice.