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Fullerene-grafted block copolymers used as compatibilizer in P3HT/PCBM bulk heterojunctions: morphology and photovoltaic performances

Abstract : The nanostructure of the active layer in polymer/fullerene bulk heterojunction solar cells is known to have a strong impact on the device performances. Controlling the polymer/fullerene blend morphology is therefore particularly important. In this work, a rod-coil block copolymer, based on a regioregular poly(3-hexylthiophene) electron-donor rod block and a C-60-grafted coil block, is used as compatibilizer and its influences on the thin film morphology as well as the photovoltaic performances are investigated. It is shown that a small fraction of compatibilizer can enhance the device performances in an otherwise non-optimized process. At higher fractions or long annealing times however, the fullerene-grafted copolymer is found to behave as a nucleation center and triggers the formation of fullerene crystals.
keyword : SOLAR-CELLS
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https://hal.archives-ouvertes.fr/hal-00956850
Contributor : Dominique Richard <>
Submitted on : Friday, March 7, 2014 - 2:31:29 PM
Last modification on : Tuesday, May 12, 2020 - 11:04:04 AM

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Véronique Gernigon, Philippe Lévêque, Cyril Brochon, Jean-Nicolas Audinot, Nicolas Leclerc, et al.. Fullerene-grafted block copolymers used as compatibilizer in P3HT/PCBM bulk heterojunctions: morphology and photovoltaic performances. European Physical Journal: Applied Physics, EDP Sciences, 2011, 56 (3), pp.art nb 34107. ⟨10.1051/epjap/2011110150⟩. ⟨hal-00956850⟩

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