Fig. 1
Out-of-plane XRD patterns of a high and b low MW P3HTs. The arrow indicates the small reflection around 20.2°. S, D, and P mean the samples prepared by spin-coating, drop-casting, and precipitation, respectively. For more details of fabrication methods see the text. The extremely broad peak centered on 22° is a halo of quartz substrates. The patterns are vertically offset for clarity