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231225s2017 xx |||||o 00| ||eng c |
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|a 10.1002/adma.201701641
|2 doi
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|a pubmed25n0913.xml
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|a (DE-627)NLM273978136
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|a eng
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|a Liu, Jian
|e verfasserin
|4 aut
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|a N-Type Organic Thermoelectrics
|b Improved Power Factor by Tailoring Host-Dopant Miscibility
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|c 2017
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Completed 18.07.2018
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|a Date Revised 01.10.2020
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2017 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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|a In this contribution, for the first time, the polarity of fullerene derivatives is tailored to enhance the miscibility between the host and dopant molecules. A fullerene derivative with a hydrophilic triethylene glycol type side chain (PTEG-1) is used as the host and (4-(1,3-dimethyl-2,3-dihydro-1H-benzoimidazol-2-yl)phenyl)dimethylamine n-DMBI) as the dopant. Thereby, the doping efficiency can be greatly improved to around 18% (<1% for a nonpolar reference sample) with optimized electrical conductivity of 2.05 S cm-1 , which represents the best result for solution-processed fullerene derivatives. An in-depth microstructural study indicates that the PTEG-1 molecules readily form layered structures parallel to the substrate after solution processing. The fullerene cage plane is alternated by the triethylene glycol side chain plane; the n-DMBI dopants are mainly incorporated in the side chain plane without disturbing the π-π packing of PTEG-1. This new microstructure, which is rarely observed for codeposited thin films from solution, formed by PTEG-1 and n-DMBI molecules explains the increased miscibility of the host/dopant system at a nanoscale level and the high electrical conductivity. Finally, a power factor of 16.7 µW m-1 K-2 is achieved at 40% dopant concentration. This work introduces a new strategy for improving the conductivity of solution-processed n-type organic thermoelectrics
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|a Journal Article
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|a conductivity
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|a fullerene derivatives
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|a n-type doping
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|a organic thermoelectrics
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|a Qiu, Li
|e verfasserin
|4 aut
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|a Portale, Giuseppe
|e verfasserin
|4 aut
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|a Koopmans, Marten
|e verfasserin
|4 aut
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|a Ten Brink, Gert
|e verfasserin
|4 aut
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|a Hummelen, Jan C
|e verfasserin
|4 aut
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|a Koster, L Jan Anton
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 29(2017), 36 vom: 01. Sept.
|w (DE-627)NLM098206397
|x 1521-4095
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|g volume:29
|g year:2017
|g number:36
|g day:01
|g month:09
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|u http://dx.doi.org/10.1002/adma.201701641
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