Layer for thin film photovoltaics and a solar cell made therefrom

摘要

A photovoltaic device 100 is provided comprising a layer 200. The layer comprises a plurality of grains 212 separated by grain boundaries 314 wherein the grains are either p-type or n-type. The grain boundaries comprise an active dopant. The active dopant concentration in the grain boundaries is higher than the effective dopant concentration in the grains. The grains and grain boundaries may be of the same type or of the opposite type. Further, when the grain boundaries are n-type the bottom of the grain boundaries may be p-type. A method of making the layer 200 is also disclosed.