Shares of China-based solar energy technology manufacturer Yingli Green Energy (YGE) are up 21 cents, or almost 4%, at $5.50 in late trading after the company said it signed a $100 million deal with E.I. DuPont de Nemours (DD) to buy from the latter polyvinyl fluoride film and photovoltaic “paste” to be used in the production of Yingli’s modules for solar panels.

The deal, encouraged by the U.S. Department of Commerce, “expands a current commercial relationship between DuPont and Yingli into a more strategic relationship with long-term benefit to both companies, and to end users of solar energy,” said DuPont’s head of its electronics and communications business, David Miller.

Shares of DuPont rose 39 cents, or 0.8%, to $50.99 in late trading.

Fin.