Broadband absorption enhancement in ultra-thin crystalline Si solar cells by incorporating metallic and dielectric nanostructures in the back reflector
Journal article, 2015

We propose a back reflecting scheme in order to enhance the maximum achievable current in one micron thick crystalline silicon solar cells. We perform 3D numerical investigations of the scattering properties of metallic nanostructures located at the back side and optimize them for enhancing absorption in the silicon layer. We validate our numerical results experimentally and also compare the absorption enhancement in the solar cell structure, both with quasi-periodic and random metallic nanostructures. We have looked at the interplay between the metallic nanostructures and an integrated back reflector. We show that the combination of metallic nanoparticles and a metallic reflector results in significant parasitic absorption. We compared this to another implementation based on titanium dioxide nanoparticles, which act as a Lambertian reflector of light. Our simulation and experimental results show that this proposed configuration results in reduced absorption losses and in broadband enhancement of absorption for ultra-thin solar cells, paving the way to an optimal back reflector for thin film photovoltaics.

crystalline silicon



solar cells



S. Jain

Silhouette Rainbows

Interuniversity Micro-Electronics Center at Leuven

V. Depauw

Interuniversity Micro-Electronics Center at Leuven

Vladimir Miljkovic

Chalmers, Applied Physics, Bionanophotonics

Alexander Dmitriev

Chalmers, Applied Physics, Bionanophotonics

C. Trompoukis

Interuniversity Micro-Electronics Center at Leuven

I. Gordon

Interuniversity Micro-Electronics Center at Leuven

P. Van Dorpe

Interuniversity Micro-Electronics Center at Leuven

O. El Daif

Interuniversity Micro-Electronics Center at Leuven

Qatar Environment and Energy Research Institute

Progress in Photovoltaics: Research and Applications

1062-7995 (ISSN)

Vol. 23 9 1144-1156

Plasmon Resonance for IMproving the Absorption of solar cells (PRIMA)

European Commission (EC) (EC/FP7/248154), 2010-01-01 -- 2012-12-31.

Subject Categories

Energy Engineering

Metallurgy and Metallic Materials



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