Masoud Jabbari - Department of Electrical Engineering, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran.
Ehsan Razmkhah - Department of Electrical Engineering, Fasa Branch, Islamic Azad University, Fasa, Iran.

In this paper the effects of transmittance, dispersion angle and diffusion length on the quantum efficiency of solar cells (QESC) have been simulated and investigated. Optical path technic is used for simulation. The results show that base thickness, diffusion length, dispersion angle, number of optical confinement path and transmission angles have an extremely effects on the QESC. Simulation results show that for optical paths with and  QE can be achieved to ۷۲% which is approximately ۱۲% more than . The simulation results with grating in SC and reflecting about ۱۰۰% at the end of the device show that QE increase to ٪۴۷ with which is more than the results of device without grating. So the results show that the QESC increase with increasing the dispersion angle and diffusion length in the grating device.

diffusion length, maximum dispersion angle, optical confinement, transmission angle