Directed crystallization of a poly(3,4-ethylenedioxythiophene) film by an iron(III) dodecyl sulfate lamellar superstructure

Feng Ma, Sang-il Choi, Dooyong Lee, Sung Bae Jeon, Sungkyun Park, Sung-Pyo Cho, Jin-Hyo Boo and Sungsoo Kim ()
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Feng Ma: Paichai University
Sang-il Choi: Paichai University
Dooyong Lee: Kyungpook National University
Sung Bae Jeon: Paichai University
Sungkyun Park: Pusan National University
Sung-Pyo Cho: Seoul National University
Jin-Hyo Boo: Sungkyunkwan University
Sungsoo Kim: Paichai University

Nature Communications, 2024, vol. 15, issue 1, 1-13

Abstract: Abstract Poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS), a successfully commercialized polymeric semiconductor material, has potential as a transparent electrode in flexible electronic devices, yet has insufficient conductivity. We present the synthesis, properties, and directed crystallization of the PEDOT:dodecyl sulfate (PEDOT:DS) film. Iron(III) dodecyl sulfate (Fe(DS)3) multi-lamellar vesicles (MLVs), a new growth template, are used to synthesize and direct the growth of the PEDOT:DS film via vapor-phase polymerization of 3,4-ethylenedioxythiophene to form huge PEDOT:DS co-crystal domains within the MLV superstructure. The polycrystalline film has metallic conductivity (avg. ~1.0 × 104 S cm−1), is highly transparent and mechanically durable yet flexible, and suitable for next-generation flexible electronics. These noteworthy properties are conferred by the MLV lamellar superstructure of Fe(DS)3, a selective oxidant and an efficient in situ dopant that enhances the film hydrophobicity and durability. Sophisticated MLV-type oxidants are foreseen to enable the synthesis of more conductive, transparent, robust, flexible, and water-stable polymer electrode materials in future.

Date: 2024
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DOI: 10.1038/s41467-024-51621-1

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