Chemical Doping of Conjugated Polymers with the Strong Oxidant Magic Blue
Artikel i vetenskaplig tidskrift, 2020

Molecular doping of organic semiconductors is a powerful tool for the optimization of organic electronic devices and organic thermoelectric materials. However, there are few redox dopants that have a sufficiently high electron affinity to allow the doping of conjugated polymers with an ionization energy of more than 5.3 eV. Here, p-doping of a broad palette of conjugated polymers with high ionization energies is achieved by using the strong oxidant tris(4-bromophenyl)ammoniumyl hexachloroantimonate (Magic Blue). In particular diketopyrrolopyrrole (DPP)-based copolymers reach a conductivity of up to 100 S cm−1 and a thermoelectric power factor of 10 µW m−1 K−2. Further, both electron paramagnetic resonance (EPR) as well as a combination of spectroelectrochemistry and chronoamperometry is used to estimate the charge-carrier density of the polymer PDPP-3T doped with Magic Blue. A molar attenuation coefficient of 6.0 ± 0.2 × 103 m2 mol−1 is obtained for the first polaronic sub-bandgap absorption of electrochemically oxidized PDPP-3T. Comparison with chemically doped PDPP-3T suggests a charge-carrier density on the order of 1026 m−3, which yields a charge-carrier mobility of up to 0.5 cm2 V−1 s−1 for the most heavily doped material.

charge-carrier density

conjugated polymers

electrochemical doping

organic thermoelectrics

chemical doping

magic blue

Författare

Anna Hofmann

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Christian Müller Group

Renee Kroon

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Christian Müller Group

Sepideh Zokaei

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Christian Müller Group

Emmy Järsvall

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Christian Müller Group

Claudia Malacrida

Institute for Polymer Chemistry

Sabine Ludwigs

Institute for Polymer Chemistry

Till Biskup

Universität des Saarlandes

Christian Müller

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Christian Müller Group

Advanced Electronic Materials

2199-160X (ISSN)

Vol. 6 8 2000249

Ämneskategorier

Materialkemi

Teoretisk kemi

Den kondenserade materiens fysik

DOI

10.1002/aelm.202000249

Mer information

Senast uppdaterat

2020-09-15