Fig. 5 (a) Different steps in the preparation of highly oriented P3HT films using the slow-DEC
method. The use of a local zone melting moving at 20 μm/s in step 4 allows the growth of P3HT
films with a high uniformity of in-plane orientation. (b, c) POM images of a P3HT thin film grown
by DEC. Orientation of the incident light polarization is indicated by the double arrows; orientation of the P3HT chains, c P3HT , is indicated by arrows. (d) Polarized UV-visible absorption
spectra of an epitaxied P3HT film. (e) X-ray line scans recorded in Bragg configuration of an
epitaxied P3HT film (M w ¼ 17.6 kDa): upper red curve out-of-plane configuration; central blue
Understanding the Structure and Crystallization of Regioregular. . .
91
method. The use of a local zone melting moving at 20 μm/s in step 4 allows the growth of P3HT
films with a high uniformity of in-plane orientation. (b, c) POM images of a P3HT thin film grown
by DEC. Orientation of the incident light polarization is indicated by the double arrows; orientation of the P3HT chains, c P3HT , is indicated by arrows. (d) Polarized UV-visible absorption
spectra of an epitaxied P3HT film. (e) X-ray line scans recorded in Bragg configuration of an
epitaxied P3HT film (M w ¼ 17.6 kDa): upper red curve out-of-plane configuration; central blue
Understanding the Structure and Crystallization of Regioregular. . .
91