Multilayer solar cell with thin polycrystalline silicon layers

A solar cell concept is presented which uses the internal structure of polycrystalline silicon for separation of photon generated electron-hole-pairs if horizontal fields generated by grain boundary charges and vertical fields caused by oxide layer charges are superimposed in an efficient manner. Polycrystalline silicon produced by LPCVD has properties necessary for texture and stability. By optimised layer thickness and arrangement the multiple reflection can be used for high rate absorption.