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The objective of this project is to design and construct an equipment to improve the efficiency of solar cells by 30%  through a surface nano-process.

The design of the equipment is partly based on the technology described in the patent WO 2099/1333225. In this patent it is explained the use of a modified material (its surface topography) on devices which generate electric current from incoming light.

The nanoprocess equipment is based on materials with a  periodic refraction index (i.e. photonic crystals) that enhance the coupling between the light and the solar cell.
The innovation studied in this project is the use of anti-reflective coatings  or the random surface topography. In contrast to others, this technology improves the light transmission through the material at high angles of incidence where the anti-reflective coatings or the corrugated surfaces stop working correctly. Besides, the expected life time of the photons is increased, which improves their absorption.

In order to insert the photonics crystals, innovative technologies such as nanolithography are used. These techniques have been adopted in some industrial sectors, however, its application in solar energy is really novel.

This R&D&I (research, development and innovation) project is focused on developing a product which can easily implemented in industry sector.

This project has been funded by the Spanish Ministry of Economy and Competitiveness under " INNPACTO Program " Expediente IPT-2011-1467-420000



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