Antireflection coatingscombiningsilicon nitridewithsiliconnanoparticles

Abstract EN

In this work, solar cellantireflection coatings (ARC) combining silicon nitride layer with silicon nanoparticles are investigated.

Two configurations are considered: silicon nanoparticles on a SiNXlayer surface and partially embedded in a SiNXlayer.

Numericalresults show thatthis ARC concept performs better in the configuration where silicon nanoparticles are placed on the dielectric layer.

Asilicon nitride refractive index of 2.3is found to be more advantageous, yielding alow weighted reflectance of 2.1% in the wavelength range300 –1100 nm.

The stability of the reflectance for oblique incidence with angles lower than 40° was alsoobserved.

With this new ARC concept, arelative increase of 8.6% in the short circuit current density over a solar cell with the standard Si3N4coating canbe expected.