Mesoscale Morphology and Charge Transport in Colloidal Networks of Poly(3-hexylthiophene)
Mesoscale Morphology and Charge Transport in Colloidal Networks of Poly(3-hexylthiophene)
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DOI：
10.1021/ma2000515
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发表时间：
2011-05
期刊：
影响因子：
5.5
通讯作者：
Gregory M. Newbloom;F. S. Kim;S. Jenekhe;D. Pozzo
中科院分区：
文献类型：
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作者：
Gregory M. Newbloom;F. S. Kim;S. Jenekhe;D. Pozzo
我们确定和表征的介观形态的聚（3-己基噻吩）（P3 HT）纤维结晶通过胶体自组装在各种芳香族溶剂。通过原位小角中子散射（SANS）和超小角中子散射（USANS）实验和电子显微镜的网络结构的P3 HT进行评估。通过对散射数据的模型拟合，我们能够确定P3 HT在沉积之前在溶液中形成网络结构。我们直接获得的结构参数，如P3 HT的分数，在ESTA形式，横截面纤维的形状，和胶体网络的分形维数。的结构参数被证明是强烈依赖于溶剂的选择。还进行了非原位显微镜实验，以提供补充的结构信息，如纤维连接的类型和频率以及网络尺寸。结构参数的范围内的空穴迁移率在有机物中进行了分析。
We identify and characterize the mesoscale morphology of poly(3-hexylthiophene) (P3HT) fibers crystallized through colloidal self-assembly in various aromatic solvents. The network structure of the P3HT is evaluated through in situ small-angle neutron scattering (SANS) and ultra small-angle neutron scattering (USANS) experiments and by electron microscopy. Through model fitting to the scattering data, we are able to determine that P3HT forms network structures in solution prior to deposition. We directly obtain structural parameters such as the fraction of P3HT in nanofiber form, the cross-sectional fiber shape, and the fractal dimension of the colloidal networks. The structural parameters are shown to be strongly dependent on the solvent choice. Ex situ microscopy experiments are also performed to provide complementary structural information such as type and frequency of fibrillar junctions and the network size. The structural parameters are also analyzed within the context of the hole mobility in organi...