A new model for PCBM phase segregation in P3HT:PCBM blends

Title: A new model for PCBM phase segregation in P3HT:PCBM blends
Creator: Berriman, Garth A.; Holmes, Natalie P.; Holdsworth, John L.; Zhou, Xiaojing; Belcher, Warwick J.; Dastoor, Paul C.
Relation: Organic Electronics Vol. 30, p. 12-17
Publisher Link: http://dx.doi.org/10.1016/j.orgel.2015.12.014
Publisher: Elsevier
Resource Type: journal article
Date: 2016
Description: The phase segregation in P3HT:PCBM blend films has been investigated from an experimental and theoretical viewpoint. Optical microscopy, atomic force microscopy, scanning electron microscopy and X-ray diffraction show that thermal annealing of P3HT:PCBM blend films leads to the formation of PCBM aggregates. These aggregates are composed of dense randomly packed ~50 nm PCBM crystallites with an overall aggregate density of ~0.85 g cm^-3. By applying the critical radius of nucleation for PCBM and the Stokes-Einstein equation for mobility of PCBM in a P3HT matrix, a model is developed which explains the formation of both crystallites and aggregates.
Subject: P3HT; PCBM; polymer blends; aggregation; crystallisation
Identifier: http://hdl.handle.net/1959.13/1345754
Identifier: uon:29716
Identifier: ISSN:1566-1199
Language: eng
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