Comparative Study of the Nanomorphology of Spray and Spin Coated PTB7 Polymer: Fullerene Films

作者：Al Hussein Mahmoud^*; Herzig Eva M; Schindler Markus; Loehrer Franziska; Palumbiny Claudia M; Wang Weijia; Roth Stephan V; Mueller Buschbaum Peter

来源：Polymer Engineering and Science, 2016, 56(8): 889-894.

DOI：10.1002/pen.24317

We present a comparative study of the nanomorphology of spray and spin coated films of a blend of thieno[3,4-b]-thiophene/benzodithiophene (PTB7) semiconducting polymer and [6,6]-phenyl-C-71-butyric acid methyl ester (PC71BM). The surface morphology and inner structure of these films are investigated with optical microscopy, atomic force microscopy (AFM), and grazing incidence wide-angle X-ray scattering (GIWAXS). The spray coated PTB7: PC71BM films exhibit significant differences in the molecular packing compared with their spin-coated counterparts. Only very weak order is observed in the spraycoated films as compared to well-defined ordered periodic lamellar structure and pi-pi stacking of the PTB7 polymer of the spin-coated systems. This difference in the resulting nanomorphology is related to the different structural formation mechanisms in the two deposition techniques.

• 出版日期2016-8