Ground-state electron transfer in all-polymer donor-acceptor heterojunctions
Artikel i vetenskaplig tidskrift, 2020
Doping of organic semiconductors is crucial for the operation of organic (opto)electronic and electrochemical devices. Typically, this is achieved by adding heterogeneous dopant molecules to the polymer bulk, often resulting in poor stability and performance due to dopant sublimation or aggregation. In small-molecule donor–acceptor systems, charge transfer can yield high and stable electrical conductivities, an approach not yet explored in all-conjugated polymer systems. Here, we report ground-state electron transfer in all-polymer donor–acceptor heterojunctions. Combining low-ionization-energy polymers with high-electron-affinity counterparts yields conducting interfaces with resistivity values five to six orders of magnitude lower than the separate single-layer polymers. The large decrease in resistivity originates from two parallel quasi-two-dimensional electron and hole distributions reaching a concentration of ∼1013 cm–2. Furthermore, we transfer the concept to three-dimensional bulk heterojunctions, displaying exceptional thermal stability due to the absence of molecular dopants. Our findings hold promise for electro-active composites of potential use in, for example, thermoelectrics and wearable electronics.
Författare
Kai Xu
Linköpings universitet
Hengda Sun
Linköpings universitet
Tero Petri Ruoko
Linköpings universitet
Gang Wang
Linköpings universitet
Renee Kroon
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Nagesh B. Kolhe
University of Washington
Yuttapoom Puttisong
Linköpings universitet
X. J. Liu
Linköpings universitet
D. Fazzi
Universität zu Köln
Koki Shibata
Chiba University
Chi Yuan Yang
Linköpings universitet
Ning Sun
Yunnan University
Gustav Persson
Chalmers, Fysik, Nano- och biofysik
Andrew Yankovich
Chalmers, Fysik, Nano- och biofysik
Eva Olsson
Chalmers, Fysik, Nano- och biofysik
Hiroyuki Yoshida
Chiba University
W.M. Chen
Linköpings universitet
M. Fahlman
Linköpings universitet
M. Kemerink
Linköpings universitet
Samson A. Jenekhe
University of Washington
Christian Müller
Chalmers, Kemi och kemiteknik, Tillämpad kemi
M. Berggren
Linköpings universitet
S. Fabiano
Linköpings universitet
Nature Materials
1476-1122 (ISSN) 1476-4660 (eISSN)
Vol. 19 7 738-744Ämneskategorier
Oorganisk kemi
Materialkemi
Den kondenserade materiens fysik
Styrkeområden
Nanovetenskap och nanoteknik (SO 2010-2017, EI 2018-)
Infrastruktur
Chalmers materialanalyslaboratorium
DOI
10.1038/s41563-020-0618-7