title: Novel 1,3-diketone modified fullerenes for organic photovoltaic cells.
abstract: The feasibility of novel 1,3-diketone modified C60s (compound 1 and 2) was studied as acceptor materials in organic photovoltaic cells (OPVC). 1,3-Diketone modified fullerenes were synthesized by the addition reaction of 1,3-bis(5'-hexylthiophen-2'-yl)propane-1,3-dione with C60 in the presence of DBU (1,8-diazabicyclo[5,4,0]undec-7-ene). From this procedure two products can be prepared, which are mono- (1) and di-substituted compound (2) in the yield of 40% and 17%, respectively. OPVCs fabricated by using the mixture of P3HT and compound 1 as an active layer showed excellent power conversion efficiency of about 3.42% after annealed at 160 degrees C for 15 min and we believe that substantial improvements can be realized by nano-structured heterojunction. It was demonstrated that 1,3-diketone modified C60 (compound 1) was one of the promising candidates for acceptor materials for OPVCs.
authors.affiliation: Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT), Daejeon 305-600, South Korea.
authors.forename: Hak Sung
authors.initials: HS
authors.lastname: Lee
authors.forename: Sung Cheol
authors.initials: SC
authors.lastname: Yoon
authors.forename: Jongsun
authors.initials: J
authors.lastname: Lim
authors.forename: Myongsoo
authors.initials: M
authors.lastname: Lee
authors.forename: Changjin
authors.initials: C
authors.lastname: Lee
mesh_terms: D002384:Catalysis; D002625:Chemistry, Organic / Q000379:methods; D004563:Electrochemistry / Q000379:methods; D037741:Fullerenes / Q000737:chemistry*; D007659:Ketones / Q000737:chemistry*; D018625:Microscopy, Atomic Force / Q000379:methods; D015394:Molecular Structure; D036103:Nanotechnology / Q000379:methods*; D010777:Photochemistry / Q000379:methods; D012666:Semiconductors; D013056:Spectrophotometry, Ultraviolet / Q000379:methods; D013997:Time Factors
chemical_list: D037741:Fullerenes; D007659:Ketones; C069837:fullerene C60