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Patent Number:	7,368,658
Patent Title:	High efficiency diamond solar cells
Full Text:
Issue Date:	05/06/2008
Patent Application Number:	US patent application 10/697,048
Inventor(s):	Gruen, Dieter M. (Downers Grove, IL)
Lab/Technology Center:	Argonne National Laboratory (ANL), Argonne, IL
Sponsoring Office:	United States Department of Energy
Contract Number:	W-31109-ENG-38
Assignee:	The United States of America as represented by the United States Department of Energy (Washington, DC)
Abstract:	A photovoltaic device and method of making same. A layer of p-doped microcrystalline diamond is deposited on a layer of n-doped ultrananocrystalline diamond such as by providing a substrate in a chamber, providing a first atmosphere containing about 1% by volume CH.sub.4 and about 99% by volume H.sub.2 with dopant quantities of a boron compound, subjecting the atmosphere to microwave energy to deposit a p-doped microcrystalline diamond layer on the substrate, providing a second atmosphere of about 1% by volume CH.sub.4 and about 89% by volume Ar and about 10% by volume N.sub.2, subjecting the second atmosphere to microwave energy to deposit a n-doped ultrananocrystalline diamond layer on the p-doped microcrystalline diamond layer. Electrodes and leads are added to conduct electrical energy when the layers are irradiated.
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