2-[(2Z)-2-[[22-[(E)-[1-(dicyanomethylidene)-5,6-difluoro-3-oxoinden-2-ylidene]methyl]-4,4,18,18-tetrakis(4-hexylphenyl)-3,17-dioxa-7,11,14,21,25,28-hexathiaoctacyclo[13.13.0.02,13.05,12.06,10.016,27.019,26.020,24]octacosa-1(15),2(13),5(12),6(10),8,16(27),19(26),20(24),22-nonaen-8-yl]methylidene]-5,6-difluoro-3-oxoinden-1-ylidene]propanedinitrile

용도COi8DFIC or O6T-4F is a highly efficient, n-type, low-bandgap nonfullerene acceptor with strong NIR absorptionIn a recent study, COi8DFIC or O6T-4F was selected in a Tandem cell by computer assited design and gave a record PCE of 17.3% for fabricated organic solar cells.Tandem Cell Device performance:ITO/ZnO/PFN-Br/PBDB-T:F-M/M-PEDOT/ZnO/PTB7- Th:O6T-4F:PC71BM/MoO3/AgVoc=1.642 VJsc=14.35 mA/cm2FF=73.7% PCE=17.3%COi8DFIC or O6T-4F is frequently selected to blend with a narrow-bandgap donor material and another narrow bandgap acceptor material to fabricate ternary organic solar cells. The PTB7-Th:COi8DFIC:PC71BM ternary cells offered a PCE of 14.08%. By further adopting a post-annealing process, an outstanding PCE of 14.62% can be achieved. Furthermore, the device utilizing COi8DFIC exhibited a good thermal stability with PCEs over 13.5% in a wide temperature range (70-160 °C). Device structure:ITO/ZnO/PTB7-Th:COi8DFIC:PC71BM/MoO3/AgBefore annealingVoc=0.702 VJsc=27.74 mA/cm2FF=0.701PCE=13.65%After annealing at 80°CVoc=0.727 VJsc=27.39 mA/cm2FF=0.734PCE=14.62%

일반 설명COi8DFIC or O6T-4F is a highly efficient, n-type, low-bandgap nonfullerene acceptor with strong NIR absorption. In a recent study, COi8DFIC or O6T-4F was selected in a Tandem cell by computer assited design and gave a record PCE of 17.3% for fabricated organic solar cells.COi8DFIC or O6T-4F is frequently selected to blend with a narrow-bandgap donor material and another narrow bandgap acceptor material to fabricate ternary organic solar cells. The PTB7-Th:COi8DFIC:PC71BM ternary cells offered a PCE of 14.08%. By further adopting a post-annealing process, an outstanding PCE of 14.62% can be achieved. Furthermore, the device utilizing COi8DFIC exhibited a good thermal stability with PCEs over 13.5% in a wide temperature range (70–160 °C).