Solar Cells

CESI has 30-year experience in the research, development and production of high efficiency solar cells both for space and terrestrial applications, due to the close and fruitful cooperation with relevant international space agencies, include those of Europe and Italy, and the Russian.
These cells can convert the solar radiation into electricity with the efficiency above 28%, and are manufactured using II-V compounds (GaAs and InGaP) as base material.
The main application of III-V solar cells is in the space, to provide electric power to the satellites, and in concentration system for the terrestrial field.
CESI is one of the top three suppliers of GaAs (Gallium Arsenide) cells.
The solar cells produced by CESI have been employed, up to now, for powering more than 60 satellites of different countries, including US and Russia.
In this field of technology, CESI can provide the following services:

• Supply of solar cells for different application fields
• Supply of epitaxial wafers according to the customer specifications
• Preliminary design of photovoltaic panels using GaAs cells
• Training and know-how transfer on GaAs technology, including non-photovoltaic technologies
• Developing of advanced technology solutions

The characteristics of solar cells developed by CESI are:

• Solar cells for space applications: Solar cells toward 35% efficiency, using new materials, nano-structures and multi junction technologies. The cells are built using modules InGaP (Indium Gallium Phosphide) and GaAs (gallium arsenide). The most important feature is the resistance: more than 30 years of life and capable of withstanding temperatures from -250°C to +300°C.
• Solar cells for terrestrial concentration systems: The terrestrial application of these high efficiency solar cells is economically appropriate for concentrator photovoltaic systems (CPV). In this application, it has been demonstrated that triple junction solar cells overcome 38% of conversion efficiency.

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