Rear located Ag nanocylinders for photocurrent enhancement in thin film GaAs solar cells.

Light trapping is a crucial factor to improve the photocurrent response in thin film solar cells. In this paper, a light trapping scheme is demonstrated by placing Ag nanocylinders on the rear surface of thin film GaAs solar cells. Finite difference time domain (FDTD) numerical simulations were used for parametric optimization of rear-located Ag nanocylinders. The results reveal that the radius, height and period of nanocylinders play crucial role in photocurrent enhancement. The maximum photocurrent of 19.47mA/cm2 is obtained for nanocylinders with radius 30nm, height 90nm and period 80nm. [ABSTRACT FROM AUTHOR]