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

doi:10.1039/c9py01879d

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

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Abstract

We report a fulvenyl-functionalized polyisocyanide (PIC2) with a high electron mobility of μ_e = 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 (V_OC) 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 language	English
Pages (from-to)	1852-1859
Number of pages	8
Journal	Polymer Chemistry
Volume	11
Issue number	11
Early online date	11 Feb 2020
DOIs	https://doi.org/10.1039/c9py01879d
Publication status	Published - 21 Mar 2020

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Allconjugated donoracceptor block copolymers featuring a pentafulvenylpolyisocyanideAcceptorFinal published version, 4.38 MBLicence: Article 25fa Dutch Copyright Act

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title = "All-conjugated donor-acceptor block copolymers featuring a pentafulvenyl-polyisocyanide-acceptor",

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.",

author = "Sandra Schraff and Sudeshna Maity and Laura Schleeper and Yifan Dong and Sebastian Lucas and Bakulin, {Artem A.} and {Von Hauff}, Elizabeth and Frank Pammer",

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T1 - All-conjugated donor-acceptor block copolymers featuring a pentafulvenyl-polyisocyanide-acceptor

AU - Schraff, Sandra

AU - Maity, Sudeshna

AU - Schleeper, Laura

AU - Dong, Yifan

AU - Lucas, Sebastian

AU - Bakulin, Artem A.

AU - Von Hauff, Elizabeth

AU - Pammer, Frank

PY - 2020/3/21

Y1 - 2020/3/21

N2 - 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.

AB - 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.

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

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