Main-​chain poly(fullerene) multiblock copolymers as organic photovoltaic donor-​acceptors and stabilizers

Mahfoudh Raïssi (1) , Harikrishna Erothu (2) , Emmanuel Ibarboure (2) , Habiba Bejbouji (1) , Henri Cramail (2) , Eric Cloutet (3, 2) , Laurence Vignau (1) , Roger C. Hiorns (2, 4)

1 IMS - Laboratoire de l'intégration, du matériau au système
2 LCPO - Laboratoire de Chimie des Polymères Organiques
3 Team 4 LCPO : Polymer Materials for Electronic, Energy, Information and Communication Technologies
4 IPREM - Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux

A multi-​block copolymer based on main-​chain fullerene repeating units is used in org. photovoltaic devices for the first time. A poly(fullerene) (PFDP) is linked at the chain-​ends to poly(3-​hexylthiophene) (P3HT) to give poly[poly(3-​hexylthiophene)​-​block-​poly{([1,​4]​-​fullerene)​-​alt-​[1,​4-​dimethylene-​2,​5-​bis(cyclohexylmethyl ether)​phenylene]​}​] (P3HT-​b-​PFDP)​. While normal devices give poor results, inverted architectures result in near 50-​fold improvements in performances to a block copolymer efficiency of 2.8​% for this novel system. PFDP-​b-​P3HT is also employed as an additive to P3HT:PCBM bulk heterojunction devices and demonstrates increases from 3.6​% to 4.2​%, and remarkably gives a stable flat-​line efficiency over the time studied.

Mots clés: copolymer; fullerene; photovoltaic

Domaines: Polymères

Mahfoudh Raïssi, Harikrishna Erothu, Emmanuel Ibarboure, Habiba Bejbouji, Henri Cramail, et al.. Main-​chain poly(fullerene) multiblock copolymers as organic photovoltaic donor-​acceptors and stabilizers. Journal of Materials Chemistry A, 2017, 5 (16), pp.7533-7544. ⟨10.1039/C7TA01980G⟩. ⟨hal-01505554⟩