A thermodynamic and kinetic description of PCBM phase segregation and aggregation in P3HT:PCBM blends

Title: A thermodynamic and kinetic description of PCBM phase segregation and aggregation in P3HT:PCBM blends
Creator: Berriman, Garth A.; Holdsworth, John L.; Zhou, Xiaojing; Belcher, Warwick J.; Dastoor, Paul C.
Relation: Organic Electronics: Physics, Materials, Applications Vol. 38, p. 15-20
Publisher Link: http://dx.doi.org/10.1016/j.orgel.2016.07.036
Publisher: Elsevier
Resource Type: journal article
Date: 2016
Description: The kinetics and thermodynamics of PCBM phase segregation and aggregation in P3HT:PCBM blends has been studied. We develop a thermodynamic model for PCBM phase segregation in P3HT:PCBM blends which explains the formation of nanoscale crystallites which subsequently diffuse and coalesce into larger PCBM aggregates. We show that the formation of nanoscale crystallites during the film making process prevents spinodal decomposition of the P3HT:PCBM blends even at PCBM weight fractions above the spinodal decomposition boundary for the system. Finally, we demonstrate that the observed aggregate morphology can be understood in terms of a kinetic model based on the diffusional flux lines of PCBM crystallite which, in turn, govern the evolution of the macroscopic growth front.
Identifier: http://hdl.handle.net/1959.13/1348525
Identifier: uon:30222
Identifier: ISSN:1566-1199
Language: eng
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