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|Title: ||Influence of nanoscale phase separation on geminate versus bimolecular recombination in P3HT:fullerene blend films|
|Authors: ||Shoaee, Safa|
Eng, Mattias P.
Luis Delgado, Juan
Durrant, James R.
|Issue Date: ||2010|
|Publisher: ||ROYAL SOC CHEMISTRY|
|Citation: ||ENERGY & ENVIRONMENTAL SCIENCE, 3(7). p. 971-976|
|Abstract: ||In this paper, we compare the charge recombination dynamics observed in films comprising poly(3-hexylthiophene) blended with three fullerene derivatives: PCBM and two alternative pyrazolinofullerenes. Transient absorption data indicate that replacement of PCBM with either of the pyrazolinofullerene derivatives results in a transition from bimolecular to monomolecular (geminate) recombination dynamics. We show that this transition cannot be explained by a difference in interfacial energetics. However, this transition does correlate with nanomorphology data which indicate that both pyrazolinofullerenes yield a much finer phase segregation, with correspondingly smaller domain sizes, than observed with PCBM. Our results therefore provide clear evidence of the role of nanomorphology in determining the nature of recombination dynamics in such donor/acceptor blends.|
|Notes: ||[Shoaee, Safa; Eng, Mattias P.; Durrant, James R.] Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AZ, England. [Espildora, Eva; Luis Delgado, Juan; Martin, Nazario] Univ Complutense, Fac Quim, Dept Quim Organ, E-28040 Madrid, Spain. [Luis Delgado, Juan; Martin, Nazario] Fac Ciencias, IMDEA Nanociencia, E-28049 Madrid, Spain. [Campo, Bert; Vanderzande, Dirk] Univ Hasselt, Inst Mat Res, Div Chem, BE-3590 Diepenbeek, Belgium.
|ISI #: ||000279322800012|
|Type: ||Journal Contribution|
|Validation: ||ecoom, 2011|
|Appears in Collections: ||Research publications|
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