SYSTEM AND METHOD FOR TRAPPING LIGHT IN A SOLAR CELL

摘要

This application relates to systems and methods for improving solar cell efficiently by enabling more light to be captured by the absorber layer. The reflector layer in a solar cell may be designed to reflect light back into the absorber layer that has already passed through the absorber layer. The reflector layer may include a surface protrusion that has a surface that has an angle of approximately 45 degrees. Incident light is reflected from that surface towards the absorber layer or towards the reflector layer which, in turn, reflects the light back towards the absorber layer or the silicon stack. The light may be reflected at an angle that enables the light to have total internal reflection within the silicon layer (e.g., absorber layer, μc-Si layer, and a-Si layer).

主权项

1. A solar energy conversion device, comprising:
a concentration lens that can refract incident light to a focal point; a transparent glass layer that is coupled to the concentration lens; a light confinement layer that is adjacent to the transparent glass layer, the light confinement layer comprising:
a silicon layer; anda reflection notch in the silicon layer that is located near the focal point; and a reflector layer that is coupled to the light confinement layer and substantially fills the reflection notch that is configured to reflect at least a portion of the incident light into the silicon layer.