Novel 1,3-diketone modified fullerenes for organic photovoltaic cells.
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.
Lee
Hak Sung
HS
Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT), Daejeon 305-600, South Korea.
Yoon
Sung Cheol
SC
Lim
Jongsun
J
Lee
Myongsoo
M
Lee
Changjin
C
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
D037741:Fullerenes; D007659:Ketones; C069837:fullerene C60