以C60,对甲苯磺酰肼和4-苯甲酰基丁酸为原料,通过一锅法多步骤合成了[60]PCBM,用硅胶柱为载体,甲苯为洗脱剂获得初步纯化的[60]PCBM。经红外光谱图和1 H NMR谱图表征,证明合成产物为目标产物。为进一步纯化产物,结合HPLC分离技术,获得99...以C60,对甲苯磺酰肼和4-苯甲酰基丁酸为原料,通过一锅法多步骤合成了[60]PCBM,用硅胶柱为载体,甲苯为洗脱剂获得初步纯化的[60]PCBM。经红外光谱图和1 H NMR谱图表征,证明合成产物为目标产物。为进一步纯化产物,结合HPLC分离技术,获得99.5%纯度的[60]PCBM。通过将副产物及回收的C60重新投入合成体系,抑制了新的副产物产生,使得新鲜C60转化为[60]PCBM的收率提高到93.3%。这些措施为降低高纯度[60]PCBM的成本奠定良好的基础。展开更多
The mixed P3HT （poly（3-hexylthiophene）） and [6,6]-PCBM （phenyl C61-butyric acid methyl ester） organic thin films were investigated for electronic structure using UV-Vis spectrophotometer and PESA （photo-electro...The mixed P3HT （poly（3-hexylthiophene）） and [6,6]-PCBM （phenyl C61-butyric acid methyl ester） organic thin films were investigated for electronic structure using UV-Vis spectrophotometer and PESA （photo-electron spectroscopy in air）. Furthermore, ESR （electron spin resonance） and AFM （atomic force microscopy） were used to investigate the surface morphology and molecular orientation, respectively. ESR analysis indicated the molecular orientation of the P3HT crystalline in the blend thin films, which the crystalline oriented normal to the substrate with distribution of 35°. AFM images indicated that the surface morphology of P3HT film was affected by the presence of PCBM nanoparticles. Solution-processed OTFTs （organic thin-film transistors） based on P3HT/PCBM blend thin film in a top source-drain contact structure was fabricated, and the electrical characteristics of the devices were also investigated. A unipolar property with p-channel characteristics were obtained in glove box measurement.展开更多
The surface composition of poly（3-hexylthiophene-2,5-diyl） and fullerene derivative [6,6]-phenyl-C61-butyric acid methyl ester （P3HT/PCBM） blend films could be changed by controlling the film formation process via...The surface composition of poly（3-hexylthiophene-2,5-diyl） and fullerene derivative [6,6]-phenyl-C61-butyric acid methyl ester （P3HT/PCBM） blend films could be changed by controlling the film formation process via using mixed solvents with different evaporation rates. The second solvent, with a higher boiling point than that of the first solvent and much better solubility for PCBM than P3HT, is chosen to mix with the first solvent with a lower boiling point and good solubility for both PCBM and P3HT. The slow evaporation rate of the second solvent provides enough time for PCBM to diffuse upwards during the solvent evaporation. Thus, the weight ratio of PCBM and P3HT （mpcBM/mp3HT） at surface of the blend films was varied from ca. 0.1 to ca. 0.72, i.e., it increases about seven times by changing from single solvent to mixed solvents. Meanwhile, the mixed solvents were in favor to form P3HT naonofiber network and enhance phase separation of P3HT/PCBM blend films. As a result, the power conversion efficiency of the device from mixed solvents with slow evaporation process was about 1.5 times of the one from single solvents.展开更多
文摘以C60,对甲苯磺酰肼和4-苯甲酰基丁酸为原料,通过一锅法多步骤合成了[60]PCBM,用硅胶柱为载体,甲苯为洗脱剂获得初步纯化的[60]PCBM。经红外光谱图和1 H NMR谱图表征,证明合成产物为目标产物。为进一步纯化产物,结合HPLC分离技术,获得99.5%纯度的[60]PCBM。通过将副产物及回收的C60重新投入合成体系,抑制了新的副产物产生,使得新鲜C60转化为[60]PCBM的收率提高到93.3%。这些措施为降低高纯度[60]PCBM的成本奠定良好的基础。
文摘The mixed P3HT （poly（3-hexylthiophene）） and [6,6]-PCBM （phenyl C61-butyric acid methyl ester） organic thin films were investigated for electronic structure using UV-Vis spectrophotometer and PESA （photo-electron spectroscopy in air）. Furthermore, ESR （electron spin resonance） and AFM （atomic force microscopy） were used to investigate the surface morphology and molecular orientation, respectively. ESR analysis indicated the molecular orientation of the P3HT crystalline in the blend thin films, which the crystalline oriented normal to the substrate with distribution of 35°. AFM images indicated that the surface morphology of P3HT film was affected by the presence of PCBM nanoparticles. Solution-processed OTFTs （organic thin-film transistors） based on P3HT/PCBM blend thin film in a top source-drain contact structure was fabricated, and the electrical characteristics of the devices were also investigated. A unipolar property with p-channel characteristics were obtained in glove box measurement.
基金financially supported by the National Natural Science Foundation of China (Nos. 20621401, 20834005,51073151)the Ministry of Science and Technology of China (No. 2009CB623604)
文摘The surface composition of poly（3-hexylthiophene-2,5-diyl） and fullerene derivative [6,6]-phenyl-C61-butyric acid methyl ester （P3HT/PCBM） blend films could be changed by controlling the film formation process via using mixed solvents with different evaporation rates. The second solvent, with a higher boiling point than that of the first solvent and much better solubility for PCBM than P3HT, is chosen to mix with the first solvent with a lower boiling point and good solubility for both PCBM and P3HT. The slow evaporation rate of the second solvent provides enough time for PCBM to diffuse upwards during the solvent evaporation. Thus, the weight ratio of PCBM and P3HT （mpcBM/mp3HT） at surface of the blend films was varied from ca. 0.1 to ca. 0.72, i.e., it increases about seven times by changing from single solvent to mixed solvents. Meanwhile, the mixed solvents were in favor to form P3HT naonofiber network and enhance phase separation of P3HT/PCBM blend films. As a result, the power conversion efficiency of the device from mixed solvents with slow evaporation process was about 1.5 times of the one from single solvents.
