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ACS Applied Materials & Interfaces 2020, 12 Trifluoromethyl Group-Modified Non-Fullerene Acceptor toward Improved Power Conversion Efficiency over 13% in Polymer Solar Cells.
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The combined analysis of these data indicates that fluorocarbon-substituted nT molecules strongly interact in the condensed state, with unit cell level phase separation between the aromatic core and fluorocarbon chains. Single-crystal X-ray diffraction data for several fluorocarbon-substituted oligomers are also presented and compared.
#Mps 126 311 transistor series#
To probe and address quantitatively how the chemistry and regiochemistry of conjugated core substitution affects molecular and solid-state properties, the entire 1− 5 series was investigated by differential scanning calorimetry, thermogravimetric analysis, and optical absorption and emission spectroscopies. All new compounds were characterized by elemental analysis, mass spectrometry, and multinuclear NMR spectroscopy. These five series include the following 25 compounds: (i) α,ω-diperfluorohexyl-nTs 1 (DFH-nTs, n = 2−6), (ii) β,β‘-diperfluorohexyl-nTs 2 (isoDFH-nTs, n = 2−6), (iii) α,ω-dihexyl-nTs 3 (DH-nTs, n = 2−6), (iv) β,β‘-dihexyl-nTs 4 (isoDH-nTs, n = 2−6), and (v) unsubstituted oligothiophenes 5 (αnTs, n = 2−6). The synthesis, comparative physicochemical properties, and solid-state structures of five oligothiophene (nT) series differing in substituent nature and attachment, regiochemistry, and oligothiophene core length ( n) are described.