Patent ID: 9012766
Filing Date: 2015-04-21
Classification: H01L,Y02E,Y02P

Abstract:
1. A solar cell, comprising: an MG-Si substrate with a purity of at least 99.99%; a lightly doped crystalline-Si (c-Si) epitaxial layer situated above the MG-Si substrate, wherein the lightly doped c-Si epitaxial layer acts as a base layer for the solar sell; a first heavily doped c-Si epitaxial layer acting as an emitter layer situated above the lightly doped c-Si base layer; a second heavily doped c-Si epitaxial layer situated between the MG-Si substrate and the light-doped c-Si base layer, wherein the second heavily doped c-Si epitaxial layer is formed independently of the lightly doped base layer, wherein the second heavily doped c-Si epitaxial layer has a doping concentration of 1×10 a front side electrode grid situated above the emitter layer; and a backside electrode grid situated below the substrate, wherein the backside electrode grid is in direct contact with a backside of the MG-Si substrate.