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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/9266

Title: Phase Diagram of P3HT/PCBM Blends and Its Implication for the Stability of Morphology
Authors: Zhao, Jun
Van Assche, Guy
Van Mele, Bruno
Issue Date: 2009
Citation: JOURNAL OF PHYSICAL CHEMISTRY B, 113(6). p. 1587-1591
Abstract: In this work, the phase diagram of poly(3-hexyl thiophene) (P3HT) and [6,6]-phenyl C-61-butyric acid methyl ester (PCBM) blends is measured by means of standard and modulated temperature differential scanning calorimetry. Blends were made by solvent-casting from chlorobenzene, as blends cast from toluene or 1,2-dichlorobenzene prove to retain effects of phase segregation during casting, hindering the determination of the phase diagram. The film morphology of P3HT/PCBM blends cast from chlorobenzene results from a dual crystallization behavior, in which the crystallization of each component is hindered by the other component. A single glass transition is observed for all compositions. The glass transition temperature (T-g) increases with increasing concentration of PCBM: from 12.1 degrees C for pure P3HT to 131.2 degrees C for pure PCBM. The observed T-g defines the operating window for the thermal annealing and explains the long-term instability of both the morphology and the photovoltaic performance of the P3HT/PCBM solar cells.
Notes: [Zhao, Jun; Van Assche, Guy; Van Mele, Bruno] Vrije Univ Brussels, Fac Engn Sci, Dept Phys Chem & Polymer Sci, B-1050 Brussels, Belgium. [Swinnen, Ann; Manca, Jean; Vanderzande, Dirk] Hasselt Univ, Inst Mat Res, B-3590 Diepenbeek, Belgium. [Manca, Jean; Vanderzande, Dirk] IMEC, Div IMOMEC, B-3590 Diepenbeek, Belgium.
URI: http://hdl.handle.net/1942/9266
DOI: 10.1021/jp804151a
ISI #: 000263134500006
ISSN: 1520-6106
Category: A1
Type: Journal Contribution
Validation: ecoom, 2010
Appears in Collections: Research publications

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