SKM 2023 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 18: Organic Electronics and Photovoltaics I (joint session CPP/HL)

CPP 18.1: Talk

Tuesday, March 28, 2023, 09:30–09:45, GÖR 226

Use of a multiple hydride donor to achieve an n-doped polymer with high solvent resistance — Farzaneh Saeedifard^1,2, Dominique Lungwitz³, Zi-Di Yu⁴, Sebastian Schneider⁵, Ahmed E. Mansour^3,6, •Andreas Opitz³, Stephen Barlow^1,2, Michael F. Toney¹, Jian Pei⁴, Norbert Koch^3,6, and Seth R. Marder^1,2 — ¹University of Colorado Boulder, US — ²Georgia Institute of Technology, Atlanta, US — ³Humboldt-Universität zu Berlin, Germany — ⁴Peking University, China — ⁵Stanford University, US — ⁶Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Germany

Insolubilization of doped semiconducting polymer layers can help to fabricate efficient multilayer solution-processed electronic and opto-electronic devices. Here, we present a promising technique to simultaneously n-dope and largely insolubilize conjugated polymer films using tetrakis[4-(1,3-dimethyl-2,3-dihydro-1H-benzo[d]imidazol-2-yl)phenoxymethyl]methane (tetrakis-O-DMBI-H), which consists of four 2,3-dihydro-1H-benzoimidazole (DMBI-H) n-dopant moieties covalently linked to one another. [1] Doping a thiophene-fused benzodifurandione-based oligo(p-phenylenevinylene)-co-thiophene polymer (TBDOPV-T) with tetrakis-O-DMBI-H results in a highly n-doped film with bulk conductivity of 15 S/cm. Optical absorption spectra reveal a film retention of ∼93% after immersion in o-dichlorobenzene for 5 min. This is caused by multiple electrostatic interactions the multiple electrostatic interactions between each dopant tetra-cation and up to four nearby anionic doped polymer segments.

[1] F. Saeedifard et al., ACS Appl. Mater. Interfaces 14 (2022) 33598.