Table 1. Results of morphology characterization from image thresholding.

	% PCBM in crystalline aggregate form	% P3HT in crystalline form	% Mixed phase
3a (169 × 169 nm2) raw image	28±3	35±5	36±8
3b (105 × 105 nm2) raw image	29±2	36±4	36±6
6a (169 × 169 nm2) after FFT	30±3	40±3	30±6
6b (105 × 105 nm2) after FFT	30±2	42±2	28±5

P3HT, poly(3-hexylthiophene); PCBM, [6,6]-phenyl C61 butyric acid methyl ester.

Data show the total phase area observed in the raw images shown in Fig. 3 and the noise-reduced images presented in Fig. 6. Errors represent the variation in phase area within one standard error on the mean thresholding levels, calculated from 10 to 15 mixed phase areas.