Light management for photovoltaics

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Development of a new ray model for understanding the coupling between dielectric spheres for photovoltaics with higher efficiency

The world is facing serious climate challenges, which are directly connected to the use of fossil energy sources that have serious negative effects on the emission of greenhouse gases. Solar energy is one of the most promising green, environmentally friendly sources of energy. It has a big advantage over the conventional power generation systems as the sunlight is converted directly into electrical energy with the help of solar cells.

Light management for silicon PV

Research Council of Norway

NFR FRINATEK
Project No: 250678
Period covered - start date: 01/04/2016
Period covered - end date: 30/06/2019
Project Manager: Rozalia Lukacs

 Today, solar cell technology development and industry are striving for thinner and thus more cost-effective solar cells. Thinner silicon solar cells address the cost effectiveness barrier, as their production costs are low. Nevertheless, in order to keep the same efficiency, research has been addressing effective light management, which is expected to provide ultrahigh-efficiency thin cells at low cost. Light management can be done by adding nanostructures on the front side, at the back surface or inside of solar cells in order to keep light as long time as possible in the neighborhood of the energy converting absorbing layer. While it has been shown that architectures with spherical and cylindrical nanoimprints can improve the efficiency of solar cells considerably, the physical rational for the absorption enhancement is not completely understood. In addition, a versatile theoretical tool that can effectively design architectures of solar cells with nanoimprints is not available.

 This project suggests to develop a theoretical model for optimization of architectures of nanoimprints. The developed model will be used to optimize the design of solar cells with nanoimprints for two types of materials. The optimized design will be validated numerically and experimentally. The project involves experts from solar cell technology and theoretical physics.

 

Literature:

Seim E., Kohler A., Lukacs R., Brandsrud M.A, Marstein E.S, Olsen E., Blümel R. 
Chaos: A new mechanism for enhancing the optical generation rate in thin-film solar cells.
SPIE West 10913 (2019).

Brandsrud M.A., Seim E., Lukacs R., Kohler A., Marstein E.S., Olsen E., Blümel R. 
Exact ray theory for the calculation of the optical generation rate in optically thin solar cells.
Physica E: Low-dimensional Systems and Nanostructures 105 (2019) 125 – 138.

Published 8. June 2016 - 23:09 - Updated 28. May 2019 - 11:30