Double doping of conjugated polymers with monomer molecular dopants
Artikel i vetenskaplig tidskrift, 2019

Molecular doping is a crucial tool for controlling the charge-carrier concentration in organic semiconductors. Each dopant molecule is commonly thought to give rise to only one polaron, leading to a maximum of one donor:acceptor charge-transfer complex and hence an ionization efficiency of 100%. However, this theoretical limit is rarely achieved because of incomplete charge transfer and the presence of unreacted dopant. Here, we establish that common p-dopants can in fact accept two electrons per molecule from conjugated polymers with a low ionization energy. Each dopant molecule participates in two charge-transfer events, leading to the formation of dopant dianions and an ionization efficiency of up to 200%. Furthermore, we show that the resulting integer charge-transfer complex can dissociate with an efficiency of up to 170%. The concept of double doping introduced here may allow the dopant fraction required to optimize charge conduction to be halved.

organic electronics

molecular doping

doping efficiency

double doping

organic semiconductor

Författare

David Kiefer

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

Renee Kroon

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

Anna Hofmann

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

Hengda Sun

Linköpings Universitet, Campus Norrköping

Xianjie Liu

Linköpings universitet

Alexander Giovannitti

Imperial College London

Dominik Stegerer

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

Technische Universität Chemnitz

Alexander Cano

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

Jonna Hynynen

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

Liyang Yu

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

Yadong Zhang

Georgia Institute of Technology

Dingqi Nai

University of California at Davis

Thomas F. Harrelson

University of California at Davis

Michael Sommer

Technische Universität Chemnitz

Adam J. Moulé

University of California at Davis

Martijn Kemerink

Linköpings universitet

Seth Marder

Georgia Institute of Technology

Iain McCulloch

King Abdullah University of Science and Technology (KAUST)

Imperial College London

Mats Fahlman

Linköpings universitet

Simone Fabiano

Linköpings Universitet, Campus Norrköping

Christian Müller

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

Nature Materials

1476-1122 (ISSN) 1476-4660 (eISSN)

Vol. 18 2 149-155

Styrkeområden

Energi

Materialvetenskap

Ämneskategorier

Textil-, gummi- och polymermaterial

Materialkemi

Annan elektroteknik och elektronik

Den kondenserade materiens fysik

DOI

10.1038/s41563-018-0263-6

PubMed

30643236

Mer information

Senast uppdaterat

2019-07-19