Yun Hang Hu, a professor of materials science and engineering, has developed a new, inexpensive material that could replace platinum in solar cells without degrading their efficiency. The material is a three-dimensional form of graphene with a honeycomb structure.

8/22/2013- Source: http://www.merid.org/en/Content/News_Services/Nanotechnology_and_Development_News/Articles/2013/Aug/22/solar.aspx