Highly Oriented and Ordered Water-Soluble Semiconducting Polymers in a DNA Matrix

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We fabricate organic field effect transistor (OFET) devices based on highly aligned aggregates of the conjugated polymer, poly[3-(potassium-7-hexanoate)-thiophene-2,5-diyl] (P3PHT), using self-organized DNA as a matrix. P3PHT is a water-soluble conjugated semiconducting polymer, which can be well-mixed with DNA to afford a P3PHT/DNA blend that can be effectively aligned by a simple shearing method. The charge carrier mobility of P3PHT is correlated with its orientation, which is related to inter- and/or intramolecular charge transport: mobility of the P3PHT/DNA blend along the pi-conjugation direction is 3 orders of magnitude higher compared to the case of neat P3PHT owing to the versatility of DNA as a template and charge injection layer. Additionally, the specific chemical interactions and physical electrostatic binding affinities between DNA and Cu2+ enables p-doping, affording hole mobilities as high as 0.22 cm(2)V(-1) s(-1), which represents the highest reported values for water-soluble polythiophene materials. The interdisciplinary convergence between DNA nanotechnology and aqueous processed organic devices can provide important guidelines for the design of sustainable and efficient organic optoelectronic devices.
Publisher
AMER CHEMICAL SOC
Issue Date
2020-01
Language
English
Article Type
Article
Citation

CHEMISTRY OF MATERIALS, v.32, no.2, pp.688 - 696

ISSN
0897-4756
DOI
10.1021/acs.chemmater.9b03475
URI
http://hdl.handle.net/10203/272587
Appears in Collection
NT-Journal Papers(저널논문)
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