Nano structure evolution in P3HT:PC61BM blend films due to the effects of thermal annealing or by adding solvent |
(a), (b) Three typical P3HT chain orientations, edge-on, face-on, and vertical, where the lattice constants a , b , c are the distance between backbones (1.69 nm), stacking distance (0.78 nm), and distance between side chains (0.78 nm), respectively. (c) The direction q z and the plane q xy are perpendicular and parallel to the sample substrate, respectively. |