文摘
N-alkylaziridino[60]fullerenes (NAAFs) were synthesized through the reaction of C60 and primary alkylamines with the aid of di(acetoxyiodo)benzene (DIB) and I2 under mild conditions. The NAAFs exhibit similar LUMO energy levels (?3.82 eV to ?3.89 eV), which is comparable with PC61BM. The NAAFs are thermally stable with the decomposition temperature over 230 ¡ãC and show good solubility in common organic solvents. Polymer solar cells based on N-phenylethylaziridino[60]fullerene/P3HT (0.5:1, w/w) demonstrated a good power conversion efficiency of 2.92 % under the illumination of 86 mW/cm2. The solar cells kept good performance (PCE = 2.71 % ) even with a very low fullerene content (N-phenylethylaziridino[60]fullerene/P3HT = 0.3:1, w/w).