Xu, Kai, Sun, Hengda ORCID: 0000-0003-3164-4557, Ruoko, Tero-Petri, Wang, Gang, Kroon, Renee, Kolhe, Nagesh B. ORCID: 0000-0003-2794-6122, Puttisong, Yuttapoom ORCID: 0000-0002-9690-6231, Liu, Xianjie ORCID: 0000-0002-3190-2774, Fazzi, Daniele ORCID: 0000-0002-8515-4214, Shibata, Koki, Yang, Chi-Yuan, Sun, Ning, Persson, Gustav, Yankovich, Andrew B., Olsson, Eva, Yoshida, Hiroyuki ORCID: 0000-0002-8889-324X, Chen, Weimin M., Fahlman, Mats ORCID: 0000-0001-9879-3915, Kemerink, Martijn, Jenekhe, Samson A., Mueller, Christian, Berggren, Magnus ORCID: 0000-0001-5154-0291 and Fabiano, Simone ORCID: 0000-0001-7016-6514 (2020). Ground-state electron transfer in all-polymer donor-acceptor heterojunctions. Nat. Mater., 19 (7). S. 738 - 747. LONDON: NATURE PUBLISHING GROUP. ISSN 1476-4660

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Abstract

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 similar to 10(13) 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. Doping through spontaneous electron transfer between donor and acceptor polymers is obtained by selecting organic semiconductors with suitable electron affinity and ionization energy, achieving high conductivity in blends and bilayer configuration.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Xu, KaiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sun, HengdaUNSPECIFIEDorcid.org/0000-0003-3164-4557UNSPECIFIED
Ruoko, Tero-PetriUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wang, GangUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kroon, ReneeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kolhe, Nagesh B.UNSPECIFIEDorcid.org/0000-0003-2794-6122UNSPECIFIED
Puttisong, YuttapoomUNSPECIFIEDorcid.org/0000-0002-9690-6231UNSPECIFIED
Liu, XianjieUNSPECIFIEDorcid.org/0000-0002-3190-2774UNSPECIFIED
Fazzi, DanieleUNSPECIFIEDorcid.org/0000-0002-8515-4214UNSPECIFIED
Shibata, KokiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Yang, Chi-YuanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sun, NingUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Persson, GustavUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Yankovich, Andrew B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Olsson, EvaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Yoshida, HiroyukiUNSPECIFIEDorcid.org/0000-0002-8889-324XUNSPECIFIED
Chen, Weimin M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fahlman, MatsUNSPECIFIEDorcid.org/0000-0001-9879-3915UNSPECIFIED
Kemerink, MartijnUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jenekhe, Samson A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mueller, ChristianUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Berggren, MagnusUNSPECIFIEDorcid.org/0000-0001-5154-0291UNSPECIFIED
Fabiano, SimoneUNSPECIFIEDorcid.org/0000-0001-7016-6514UNSPECIFIED
URN: urn:nbn:de:hbz:38-341316
DOI: 10.1038/s41563-020-0618-7
Journal or Publication Title: Nat. Mater.
Volume: 19
Number: 7
Page Range: S. 738 - 747
Date: 2020
Publisher: NATURE PUBLISHING GROUP
Place of Publication: LONDON
ISSN: 1476-4660
Language: English
Faculty: Faculty of Mathematics and Natural Sciences
Divisions: Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Physical Chemistry
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
ENERGY-LEVEL ALIGNMENT; CHARGE-TRANSFER; MOLECULAR DOPANT; TTF-TCNQ; CONDUCTIVITY; TRANSPORT; DEVICES; WEIGHTMultiple languages
Chemistry, Physical; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed MatterMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/34131

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