Back-Contact Electron Reflectors Enhancing Thin Film Solar Cell Efficiency

摘要

Methods for improving the efficiency of solar cells are disclosed. A solar cell consistent with the present disclosure includes a back contact metal layer disposed on a substrate. The solar cell also includes an electron reflector material(s) layer formed on the back contact metal layer and an absorber material(s) layer disposed on the electron reflector material(s) layer. In addition, the solar cell includes a buffer material(s) layer formed on the absorber material(s) layer wherein the electron reflector material(s) layer, absorber material(s) layer, and buffer material(s) layer form a pn junction within the solar cell. Furthermore, a TCO material(s) layer is formed on the buffer material(s) layer. In addition, the front contact layer is formed on the TCO material(s) layer.

主权项

1. A solar cell, comprising:
a first metal layer disposed on a substrate; a material layer formed above the first metal layer, the material layer operable as an electron reflector layer; an absorber material layer formed above the material layer; a buffer material layer formed above to the absorber material layer; a transparent conductive oxide material layer formed above the buffer material layer; and a second metal layer formed above the transparent conductive oxide material layer.