State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
J Phys Chem B. 2011 Nov 24;115(46):13449-54. doi: 10.1021/jp205755r. Epub 2011 Nov 1.
Crystallization of P3HT on highly oriented PE ultrathin films via solution-deposition has been studied by means of optical microscopy, atomic force microscopy, Fourier transform infrared spectroscopy (FTIR), and electron diffraction. The results clearly indicated the occurrence of heteroepitaxy of P3HT on the PE substrate, which results in a parallel alignment of P3HT on the PE substrate. FTIR spectra and electron diffraction analyses demonstrate that molecular chains of P3HT are oriented in the film plane and aligned parallel to the chain direction of PE substrate crystals, while the (100) lattice plane of P3HT is in contact with the PE substrate. The observed epitaxy can be explained in terms of an excellent one-dimensional lattice matching between the interchain distances of PE in the (110) lattice plane and P3HT in the (100) lattice plane. This kind of epitaxial crystallization provides an efficient way for fabricating large area P3HT films with unique oriented structures.
通过溶液沉积法研究了 P3HT 在高度取向的 PE 超薄膜上的结晶情况，使用的方法有光学显微镜、原子力显微镜、傅里叶变换红外光谱（FTIR）和电子衍射。结果清楚地表明了 P3HT 在 PE 衬底上的异质外延的发生，这导致 P3HT 在 PE 衬底上平行排列。FTIR 谱和电子衍射分析表明，P3HT 的分子链在薄膜平面内取向，并与 PE 衬底晶体的链方向平行排列，而 P3HT 的（100）晶格面与 PE 衬底接触。可以根据 PE 在（110）晶格面和 P3HT 在（100）晶格面中的链间距离之间的良好一维晶格匹配来解释观察到的外延。这种外延结晶为制备具有独特取向结构的大面积 P3HT 薄膜提供了一种有效的方法。
