RAÏSSI, Mahfoudh; EROTHU, Harikrishna; IBARBOURE, Emmanuel; CRAMAIL, Henri; VIGNAU, Laurence; CLOUTET, Eric; HIORNS, Roger C.

doi:10.1039/C5TA02705E

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RAÏSSI, Mahfoudh
Laboratoire de l'intégration, du matériau au système [IMS]

EROTHU, Harikrishna
Laboratoire de Chimie des Polymères Organiques [LCPO]

IBARBOURE, Emmanuel
Laboratoire de Chimie des Polymères Organiques [LCPO]

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Journal of Materials Chemistry A. 2015, vol. 3, n° 35, p. 18207-18221

Royal Society of Chemistry

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A fullerene end-capped polymer-compatibilizer based on poly(3-hexylthiophene) (P3HT) was synthesized and demonstrated to have a remarkable effect on both the stability and efficiency of devices made from exemplar P3HT and [6,6]-phenyl C61-butyric acid methyl ester (PCBM). P3HT with ethynyl chain-ends and -azido--bromo-PS were prepared via Grignard metathesis (GRIM) and atom transfer radical polymerisations, respectively. “Click” chemistry resulted in the preparation of poly(3-hexylthiophene)-block--bromo-polystyrene (P3HT-b-PS-Br), and subsequent atom transfer radical addition chemistry with fullerene (C60) yielded the donor-acceptor block copolymer P3HT-b-PS-C60. Both P3HT-b-PS-Br and P3HT-b-PS-C60 were considered as compatibilizers with P3HT/PCBM blends, with the study detailing effects on active-layer morphology, device efficiency and stability. When used at low concentrations, both P3HT-b-PS-Br (1%) and P3HT-b-PS-C60 (0.5%) resulted in considerable 28% and 35% increases in efficiencies with respect to devices made from P3HT/PCBM alone. Furthermore, P3HT-b-PS-C60 (0.5%) resulted in an important improvement in device stability.< Leer menos

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Fullerene-capped copolymers for bulk heterojunctions: device stability and efficiency improvements

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