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Based on silver nanoparticle arrays and blazed grating arrays. we have designed structures of thin film silicon solar cells both at the front and the rear surfaces. In the design of the front surface of the cells. silver nanoparticle arrays have been placed in order to increase the light transmittance at top. utilizing the surface plasmon resonance effect induced by the metallic nanoparticles. At the rear surface of the cells. blazed grating arrays have been used to decrease light transmittance at bottom. We have also combined both surface designs and calculated the weighted mean values of the photons absorbed by silicon over all the wavelengths studied. The results indicate that the light trapping efficiency can be optimized under certain combinations of the structural parameters.
