Controlling the nanoscale arrangement in polymer-fullerene organic solar cells is of paramount importance to boost the performance of such promising class of photovoltaic diodes. In this work, we use a pseudo-bilayer system made of poly(2,5-bis(3-hexadecylthiophen-2-yl)thieno[3,2-b]thiophene (PBTTT) and [6,6]-phenyl-C 61 -butyric acid methyl ester (PCBM), to acquire a more complete understanding of the diffusion and intercalation of the fullerene-derivative within the polymer layer. By exploiting morphological and structural characterisation techniques, we observe that if we increase the film solidification time the polymer develops a higher crystalline order, and, as a result, it does not allow fullerene molecules to intercalate between the polymer side-chains. Gaining insight into the detailed fullerene intercalation mechanism is important for the development of organic photovoltaic diodes (PVDs).
CITATION STYLE
Paternò, G. M., Skoda, M. W. A., Dalgliesh, R., Cacialli, F., & García Sakai, V. (2016). Tuning fullerene intercalation in a Poly (thiophene) derivative by controlling the polymer degree of self-organisation. Scientific Reports, 6. https://doi.org/10.1038/srep34609
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