Category: Next Generation Photovoltaics High efficiency through full spectrum utilization

Conclusions of the Third-generation PV workshop for high efficiency through full spectrum utilization

As a result of the presentations during the workshop and the subsequent discussion, the participants have agreed the following conclusions: • Present solar cells are not likely to reach a cost that will allow penetration of the PV electricity market because, in their present form—with poor utilization of the solar spectrum—they make ineffective use of […]

Appendix: Uniform distribution as the optimum illumination

We will formally prove with the model presented in section 13.1.5 that for cells whose grid-line series resistance is negligible, when the local concentration distribution is assumed to vary slowly between the grid-lines, the distribution providing maximum cell efficiency is the uniform one. Let us consider the cell model presented in section 13.1.5. In the […]

Concentrator optics overview

13.2.1 Classical concentrators The progress in solar cells development since its invention has been huge. The investment needed has also been important. Present cells have become much more efficient and the technology much more advanced. The next-generation approaches discussed in this book try to further cell development, increasing cell sophistication if necessary. However, PV concentrator […]

Non-imaging optics: the best framework for concentrator design

Non-imaging optics (also called anidolic optics) is the branch of optics that deals with maximum efficiency power transfer from a light source to a receiver [], and, thus, it is the best framework for PV concentrator design. The term non-imaging comes from the fact that for achieving high efficiency the image formation condition is not […]

Non-uniform irradiance on the solar cell: How critical is it?

It is well known that non-uniform illumination of solar cells under high concentration may decrease the power output significantly. For the concentrator designer, the key question is what local concentration distribution can be considered good enough for a given cell. Usually, the only information available for concentrator designers is the cell efficiency under uniform illumination […]