DuPont and the Chinese subsidiary of Yingli Green Energy Holding Co. Ltd. said Monday that they agreed on a $100 million deal to boost the supply of solar-energy materials.
Yingli will buy materials from E.I. du Pont de Nemours and Co. such as special pastes and polyvinyl films used in solar modules.
The agreement was signed at a ceremony in Washington that was organized by the U.S. Commerce Department and China's government.
DuPont shares fell 14 cents to close at $50.60, while Yingli's lost 5 cents to close at $5.29.