Paul Sullivan and Luke Rochford, in collaboration with researchers at CSIRO in Melbourne, Australia, report in Chemical Communications on a new non-fullerene acceptor material for evaporated organic solar cells:

"A new evaporable electron acceptor material for organic photovoltaics based on N-ethyl barbituric acid bithiophene (EBB) has been demonstrated. Bilayer devices fabricated with this non-fullerene acceptor and boron subphthalocyanine chloride (SubPc) donor produce power conversion efficiencies as high as 2.6% with an extremely large open-circuit voltage approaching 1.4 V."

http://pubs.rsc.org/en/content/articlelanding/2015/cc/c5cc00564g