Closely Packed Polypyrroles via Ionic Cross-Linking: Correlation of Molecular Structure-Morphology-Thermoelectric Properties

Juhyung Park, Yeran Lee, Miso Kim, Yungeun Kim, Ayushi Tripathi, Young Wan Kwon, Jeonghun Kwak, Han Young Woo

Research output: Contribution to journalArticle

Abstract

A series of ionically interconnected polypyrrole (PPy) films are fabricated through two-monomer-connected-precursor polymerization by varying diacid linkers, thereby significantly influencing the crystalline morphology and electrical properties. The structure obtained using 1,5-napthalenedisulfonic acid (PPy-Nap) as a fused aromatic linker exhibits a higher electrical conductivity (∼78 S cm-1) than that (6.7 S cm-1) without a linker (PPy-ref). Cryogenic conductivity measurements reveal that the percolation carrier transport barrier of PPy-Nap is significantly smaller than that of PPy-ref, and the calculated carrier mobility of PPy-Nap is ∼5 times higher compared to PPy-ref. The carrier transport characteristics show a good agreement with morphological data by 2D grazing-incidence X-ray scattering. All PPys have similar doped charge carrier concentrations and, thus, similar Seebeck coefficients (5-8 μV K-1) but very different electrical conductivities. Consequently, PPy-Nap exhibits a higher power factor than that of PPy-ref (0.21 vs 0.043 μW m-1 K-2). The results show that the trade-off relationship between the Seebeck coefficient and electrical conductivity can be overcome by improving crystalline morphology and carrier transport. Thus, both the electrical conductivities and thermoelectric power factors can be improved with maintaining the Seebeck coefficients by enhancing the ordered conductive domains and carrier mobility while maintaining the doping level.

Original languageEnglish
Pages (from-to)1110-1119
Number of pages10
JournalACS Applied Materials and Interfaces
Volume12
Issue number1
DOIs
Publication statusPublished - 2020 Jan 8

Fingerprint

Polypyrroles
Molecular structure
Seebeck coefficient
Carrier transport
Carrier mobility
Crystalline materials
polypyrrole
Thermoelectric power
Charge carriers
X ray scattering
Cryogenics
Carrier concentration
Electric properties
Monomers
Polymerization
Doping (additives)
Acids
Electric Conductivity

Keywords

  • conductivity
  • morphology
  • organic thermoelectric
  • polypyrroles
  • Seebeck coefficient

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Closely Packed Polypyrroles via Ionic Cross-Linking : Correlation of Molecular Structure-Morphology-Thermoelectric Properties. / Park, Juhyung; Lee, Yeran; Kim, Miso; Kim, Yungeun; Tripathi, Ayushi; Kwon, Young Wan; Kwak, Jeonghun; Woo, Han Young.

In: ACS Applied Materials and Interfaces, Vol. 12, No. 1, 08.01.2020, p. 1110-1119.

Research output: Contribution to journalArticle

Park, Juhyung ; Lee, Yeran ; Kim, Miso ; Kim, Yungeun ; Tripathi, Ayushi ; Kwon, Young Wan ; Kwak, Jeonghun ; Woo, Han Young. / Closely Packed Polypyrroles via Ionic Cross-Linking : Correlation of Molecular Structure-Morphology-Thermoelectric Properties. In: ACS Applied Materials and Interfaces. 2020 ; Vol. 12, No. 1. pp. 1110-1119.
@article{cc2d81df48af47e7a17dac86a934f34d,
title = "Closely Packed Polypyrroles via Ionic Cross-Linking: Correlation of Molecular Structure-Morphology-Thermoelectric Properties",
abstract = "A series of ionically interconnected polypyrrole (PPy) films are fabricated through two-monomer-connected-precursor polymerization by varying diacid linkers, thereby significantly influencing the crystalline morphology and electrical properties. The structure obtained using 1,5-napthalenedisulfonic acid (PPy-Nap) as a fused aromatic linker exhibits a higher electrical conductivity (∼78 S cm-1) than that (6.7 S cm-1) without a linker (PPy-ref). Cryogenic conductivity measurements reveal that the percolation carrier transport barrier of PPy-Nap is significantly smaller than that of PPy-ref, and the calculated carrier mobility of PPy-Nap is ∼5 times higher compared to PPy-ref. The carrier transport characteristics show a good agreement with morphological data by 2D grazing-incidence X-ray scattering. All PPys have similar doped charge carrier concentrations and, thus, similar Seebeck coefficients (5-8 μV K-1) but very different electrical conductivities. Consequently, PPy-Nap exhibits a higher power factor than that of PPy-ref (0.21 vs 0.043 μW m-1 K-2). The results show that the trade-off relationship between the Seebeck coefficient and electrical conductivity can be overcome by improving crystalline morphology and carrier transport. Thus, both the electrical conductivities and thermoelectric power factors can be improved with maintaining the Seebeck coefficients by enhancing the ordered conductive domains and carrier mobility while maintaining the doping level.",
keywords = "conductivity, morphology, organic thermoelectric, polypyrroles, Seebeck coefficient",
author = "Juhyung Park and Yeran Lee and Miso Kim and Yungeun Kim and Ayushi Tripathi and Kwon, {Young Wan} and Jeonghun Kwak and Woo, {Han Young}",
year = "2020",
month = "1",
day = "8",
doi = "10.1021/acsami.9b17009",
language = "English",
volume = "12",
pages = "1110--1119",
journal = "ACS applied materials & interfaces",
issn = "1944-8244",
publisher = "American Chemical Society",
number = "1",

}

TY - JOUR

T1 - Closely Packed Polypyrroles via Ionic Cross-Linking

T2 - Correlation of Molecular Structure-Morphology-Thermoelectric Properties

AU - Park, Juhyung

AU - Lee, Yeran

AU - Kim, Miso

AU - Kim, Yungeun

AU - Tripathi, Ayushi

AU - Kwon, Young Wan

AU - Kwak, Jeonghun

AU - Woo, Han Young

PY - 2020/1/8

Y1 - 2020/1/8

N2 - A series of ionically interconnected polypyrrole (PPy) films are fabricated through two-monomer-connected-precursor polymerization by varying diacid linkers, thereby significantly influencing the crystalline morphology and electrical properties. The structure obtained using 1,5-napthalenedisulfonic acid (PPy-Nap) as a fused aromatic linker exhibits a higher electrical conductivity (∼78 S cm-1) than that (6.7 S cm-1) without a linker (PPy-ref). Cryogenic conductivity measurements reveal that the percolation carrier transport barrier of PPy-Nap is significantly smaller than that of PPy-ref, and the calculated carrier mobility of PPy-Nap is ∼5 times higher compared to PPy-ref. The carrier transport characteristics show a good agreement with morphological data by 2D grazing-incidence X-ray scattering. All PPys have similar doped charge carrier concentrations and, thus, similar Seebeck coefficients (5-8 μV K-1) but very different electrical conductivities. Consequently, PPy-Nap exhibits a higher power factor than that of PPy-ref (0.21 vs 0.043 μW m-1 K-2). The results show that the trade-off relationship between the Seebeck coefficient and electrical conductivity can be overcome by improving crystalline morphology and carrier transport. Thus, both the electrical conductivities and thermoelectric power factors can be improved with maintaining the Seebeck coefficients by enhancing the ordered conductive domains and carrier mobility while maintaining the doping level.

AB - A series of ionically interconnected polypyrrole (PPy) films are fabricated through two-monomer-connected-precursor polymerization by varying diacid linkers, thereby significantly influencing the crystalline morphology and electrical properties. The structure obtained using 1,5-napthalenedisulfonic acid (PPy-Nap) as a fused aromatic linker exhibits a higher electrical conductivity (∼78 S cm-1) than that (6.7 S cm-1) without a linker (PPy-ref). Cryogenic conductivity measurements reveal that the percolation carrier transport barrier of PPy-Nap is significantly smaller than that of PPy-ref, and the calculated carrier mobility of PPy-Nap is ∼5 times higher compared to PPy-ref. The carrier transport characteristics show a good agreement with morphological data by 2D grazing-incidence X-ray scattering. All PPys have similar doped charge carrier concentrations and, thus, similar Seebeck coefficients (5-8 μV K-1) but very different electrical conductivities. Consequently, PPy-Nap exhibits a higher power factor than that of PPy-ref (0.21 vs 0.043 μW m-1 K-2). The results show that the trade-off relationship between the Seebeck coefficient and electrical conductivity can be overcome by improving crystalline morphology and carrier transport. Thus, both the electrical conductivities and thermoelectric power factors can be improved with maintaining the Seebeck coefficients by enhancing the ordered conductive domains and carrier mobility while maintaining the doping level.

KW - conductivity

KW - morphology

KW - organic thermoelectric

KW - polypyrroles

KW - Seebeck coefficient

UR - http://www.scopus.com/inward/record.url?scp=85077656955&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85077656955&partnerID=8YFLogxK

U2 - 10.1021/acsami.9b17009

DO - 10.1021/acsami.9b17009

M3 - Article

C2 - 31825593

AN - SCOPUS:85077656955

VL - 12

SP - 1110

EP - 1119

JO - ACS applied materials & interfaces

JF - ACS applied materials & interfaces

SN - 1944-8244

IS - 1

ER -