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Effects of thermal annealing upon the nanomorphology of poly(3-hexylselenophene)-PCBM blends

DOI: 10.1002/marc.201100330 DOI Help

Authors: Samuele Lilliu (Cardiff University) , Tiziano Agostinelli (Imperial College London) , Eric Verploegen (Stanford Synchrotron Radiation Lightsource) , Ellis Pires (University of Cardiff) , Mark Hampton (University of Cardiff) , Mohammed Al-Hashimi (Imperial College London) , Martin J. Heeney (Imperial College London) , Michael F. Toney (Stanford Synchrotron Radiation Lightsource) , Jenny Nelson (Imperial College London) , J. Emyr Macdonald (Cardiff University)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Macromolecular Rapid Communications , VOL 32 (18) , PAGES 1454 - 1460

State: Published (Approved)
Published: July 2011

Abstract: Grazing incidence X-ray diffraction (GI-XRD) is used to characterize the crystallographic dynamics of low molecular weight (LMW) and high molecular weight (HMW) poly(3-hexylselenophene) (P3HS) films and blend films of P3HS with [6-6-]-phenyl-C61-butyric acid methyl ester (PCBM) as a function of ‘step-by-step’ thermal annealing, from room temperature to 250 °C. The temperature-dependent GIXRD data show how the melting point of P3HS crystallites is decreased by the presence of PCBM. P3HS crystallite domain sizes dramatically increase upon annealing to the P3HS melting temperature. The formation of well-oriented HMW P3HS crystallites with the (100) plane parallel to the substrate (edge-on orientation), when cooled from melt, are observed. We compare the behaviour of P3HS pure and blend films with that of poly(3-hexyl)thiophene (P3HT) pure and PCBM blended films and suggest that the similar temperature dependent behaviour we observe may be a common to polythiophene and related polymers and their blends.

Journal Keywords: conjugated polymers; crystallization; disorder; fullerenes; wide-angle X-ray scattering

Subject Areas: Materials

Instruments: I07-Surface & interface diffraction

Other Facilities: B28 at ESRF

Added On: 10/10/2011 13:29

Discipline Tags:

Materials Science Polymer Science

Technical Tags:

Diffraction Grazing Incidence X-ray Diffraction (GIXD)