Enhance the solar cell efficiency by reduction of reflection losses

Abstract

The enhancement of the solar cell efficiency field has been achieved in many methods due to the different factors and conditions that led to loss the solar energy. This work deals with the increasing of the efficiency of solar cell that made of single crystalline silicon. This increment achieved by the reduction of biggest type of losses of the conversion efficiency named reflection. by using two methods first; forming grooves on the surface using pulse Nd:YAG laser with max energy 1J and pulse width 10ns, using the fast and accurate movement of the 3D optical galvo mirror scanning system to form the grooves, the second method was by deposition nanomaterials as Silver (Ag) and Cadmium telluride (CdTe) to constitute an antireflection layer for the incident solar spectrum. The effect of antireflection layer material type and the effect of incident light angle on the reflection had been studied in this work. The reflectance had been measured by a system designed and built to give the reflection for angles ranged 0 – 180 degree controlled by Microcontroller. The result inducate that increase in conversion efficiency was 28.3% for Ag/Si, and 32.9% for CdTe/Si than the original efficiency of Si solar cell.