All-conjugated donor-acceptor block copolymers featuring a pentafulvenyl-polyisocyanide-acceptor

Sandra Schraff, Sudeshna Maity, Laura Schleeper, Yifan Dong, Sebastian Lucas, Artem A. Bakulin, Elizabeth Von Hauff, Frank Pammer*

*Corresponding author for this work

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

We report a fulvenyl-functionalized polyisocyanide (PIC2) with a high electron mobility of μe = 10-2 cm2 V-1 s-1. PIC2 has been incorporated into block-copolymers with either regioregular poly(3-dodecylthiophene) (P3DT → P(3DT-b-IC2)) or regioregular polythiazole (PTzTHX → P(TzTHX-b-IC2)). Block copolymer batches with different block-sizes have been isolated and their properties have been studied. Fluorescence quenching in the solid state and transient absorption spectroscopy indicate energy transfer from the donor-to the acceptor block upon photo-excitation. Fabrication of proof-of-principle organic photovoltaic cells with P(3DT-b-IC2) gave cells with an open circuit voltage (VOC) of ca. 0.89 V. The aggregation behavior of P(3DT-b-IC2) from solution was also studied, which revealed self-assembly into discreet microspheres of 1-8 μm diameter, with a size distribution of 1.72 (±0.37) μm under optimized aggregation conditions.

Original languageEnglish
Pages (from-to)1852-1859
Number of pages8
JournalPolymer Chemistry
Volume11
Issue number11
DOIs
Publication statusPublished - 21 Mar 2020

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