Patent ID: 8283559
Filing Date: 2012-10-09
Classification: H01L,Y02E,Y02P

Abstract:
1. A solar cell, comprising: a metallurgical-grade Si (MG-Si) substrate; a first heavily doped crystalline-Si layer situated above the MG-Si substrate; a lightly doped crystalline-Si layer situated above the first heavily doped crystalline-Si layer; a second heavily doped crystalline-Si layer situated above the lightly doped crystalline-Si layer; front electrodes situated above the second heavily doped crystalline-Si layer; a passivation layer situated between the second heavily doped crystalline-Si layer and the front electrodes, wherein the passivation layer passivates a surface of the second heavily doped crystalline-Si layer, wherein the passivation layer includes a three-layer dielectric stack, wherein the three-layer dielectric stack includes a SiO a backside ohmic-contact layer situated on the backside of the MG-Si substrate.