Nano structure evolution in P3HT:PC<sub>61</sub>BM blend films due to the effects of thermal annealing or by adding solvent

Nano structure evolution in P3HT:PC₆₁BM blend films due to the effects of thermal annealing or by adding solvent

Fan Xing^a),^b), Zhao Su-Ling†^a),^b), Chen Yu^c), Zhang Jie^c), Yang Qian-Qian^a),^b), Gong Wei^a),^b), Yuan Meng-Yao^c), Xu Zheng^a),^b), Xu Xu-Rong^a),^b)

(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.