title: A non-fullerene small molecule as efficient electron acceptor in organic bulk heterojunction solar cells.
abstract: A novel n-type small molecule FFI-1 was synthesized as the electron acceptor to replace PCBM in solution-processed organic BHJ solar cells. Its LUMO level (around -3.5 eV) both matches the work function of the cathode and increases V(OC)  of the devices, making it a promising acceptor candidate. With P3HT: FFI-1 (1:2 w/w) as active layer and LiF/Al as the cathode, the best power conversion efficiency (PCE) reaches 1.86%.
authors.affiliation: Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhou
authors.forename: Lin
authors.initials: L
authors.lastname: Ding
authors.forename: Ke
authors.initials: K
authors.lastname: Shi
authors.forename: Ya-Zhong
authors.initials: YZ
authors.lastname: Dai
authors.forename: Na
authors.initials: N
authors.lastname: Ai
authors.forename: Jian
authors.initials: J
authors.lastname: Wang
authors.forename: Jian
authors.initials: J
authors.lastname: Pei
mesh_terms: D004583:Electrons; D005449:Fluorenes / Q000138:chemical synthesis / Q000737:chemistry*; D037741:Fullerenes / Q000737:chemistry; D007094:Imides / Q000138:chemical synthesis / Q000737:chemistry; D018625:Microscopy, Atomic Force; D010797:Phthalimides / Q000138:chemical synthesis / Q000737:chemistry*; D012993:Solar Energy
chemical_list: C539575:(6,6)-phenyl C61-butyric acid methyl ester; D005449:Fluorenes; D037741:Fullerenes; D007094:Imides; D010797:Phthalimides