Researches On Increasing The Absorption Efficiency Of Thin Film Solar Cells By Surface Plasmon

The use of nanoparticles on thin-film solar ells is an effective way to enhance optical absorption. Through the design of new cell structures, making metal nanoparticles have a significant effect of plasma resonance, can be reached broad spectrum of light absorption and efficient energy conversion and improve the efficiency of solar cells.A simulation is presented for a three-dimensional array of cylindrical Ag nanoparticles on the surface of a solar cell, which has been proved very efficient to enhance the optical absorption of the silicon substrate by utilizing localized surface plasmons. The enhancement ratio has been simulated with respect to nanoparticle radius and height as well as crystalline silicon substrate thickness and is discussed in detail. The absorption enhancement was found to exhibit a damping oscillation when only height or thickness of the cylindrical nanoparticle were varied. Even without intentional optimization, an enhancement factor of1.283for a silicon substrate with a thickness of500nm was still achieved in our simulations. A further optimized structure has the potential to attain a higher factor.