An easy, high-yield and atom-economic procedure of a C60 fullerene modification using a reaction of fullerene C60 with N-alkylisatins in the presence of tris(diethylamino)phosphine to form novel long-chain alkylindolinone-substituted methanofullerenes (AIMs) is described. Optical absorption, electrochemical properties and solubility of AIMs were studied. Poly(3-hexylthiophene-2,5-diyl) (P3HT)/AIMs solar cells were fabricated and the effect of the AIM alkyl chain length and the P3HT:AIM ratio on the solar cell performance was studied. The power conversion efficiencies of about 2% were measured in the P3HT/AIM devices with 1:0.4 P3HT:AIM weight ratio for the AIMs with hexadecyl and dodecyl substituents. From the optical and AFM data, we suggested that the AIMs, in contrast to [6,6]-phenyl-C61-butyric acid methyl ester (PCBM), do not disturb the P3HT crystalline domains. Moreover, the more soluble AIMs do not show a better miscibility with the P3HT crystalline phase.
一种简单、高产率且原子经济的方法是利用富勒烯C60与N-烷基异吲哚酮在三(二乙基氨基)膦存在下反应,形成新型长链烷基吲哚酮取代的甲基富勒烯(AIMs)的改性。研究了AIMs的光吸收、电化学性质和溶解性。制备了聚(3-己基噻吩-2,5-二基)(P3HT)/AIMs太阳能电池,并研究了AIM烷基链长度和P3HT:AIM比例对太阳能电池性能的影响。在P3HT/AIM器件中,当P3HT:AIM重量比为1:0.4时,具有十六烷基和十二烷基取代基的AIMs的功率转换效率约为2%。根据光学和原子力显微镜数据,我们建议AIMs与[6,6]-苯基-C61-丁酸甲酯(PCBM)不同,不会干扰P3HT的结晶领域。此外,更溶解的AIMs与P3HT结晶相的混溶性并不更好。