Patent 10062800 was granted and assigned to First Solar on August, 2018 by the United States Patent and Trademark Office.
A photovoltaic device is presented. The photovoltaic device includes a layer stack; and an absorber layer is disposed on the layer stack. The absorber layer includes selenium, and an atomic concentration of selenium varies non-linearly across a thickness of the absorber layer. A method of making a photovoltaic device is also presented.