Charge Dynamics Study of the Percolation Threshold in a Polymer-Fullerene Composite System

Kyu Hyun Mo; Dong Min Choi; Cheol Eui Lee

doi:10.3938/jkps.74.527

Charge Dynamics Study of the Percolation Threshold in a Polymer-Fullerene Composite System

Kyu Hyun Mo, Dong Min Choi, Cheol Eui Lee

Department of Physics

Research output: Contribution to journal › Article › peer-review

Abstract

A fullerene percolation threshold has been identified in the current density-voltage (J-V) characteristics of a 5-(2’-ethyl-hexyloxy)-p-phenylene-vinylene (MEH-PPV) conjugated polymer and fullerene (C ₆₀ ) composite system. Charge dynamics associated with the percolation threshold was studied in this work by means of time-of-flight (TOF) measurements of the charge carrier mobilities. The hole mobility showed little change up to a fullerene concentration of 1 wt.%. On the other hand, the electron mobility increased with increasing fullerene concentration and exhibited a critical behavior with a maximum at a percolation threshold of 0.8 wt.%, at which a minimum in the energetic disorder took place.

Original language	English
Pages (from-to)	527-529
Number of pages	3
Journal	Journal of the Korean Physical Society
Volume	74
Issue number	5
DOIs	https://doi.org/10.3938/jkps.74.527
Publication status	Published - 2019 Mar 1

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (Project No. 2016R1D1A1A 09917003). The Korea Basic Science Institute (KBSI) is acknowledged for the measurements.

Publisher Copyright:
© 2019, The Korean Physical Society.

Keywords

Charge dynamics
Fullerene-doped MEH-PPV conjugated polymers
Percolation threshold

ASJC Scopus subject areas

General Physics and Astronomy

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10.3938/jkps.74.527

Cite this

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title = "Charge Dynamics Study of the Percolation Threshold in a Polymer-Fullerene Composite System",

abstract = " A fullerene percolation threshold has been identified in the current density-voltage (J-V) characteristics of a 5-(2{\textquoteright}-ethyl-hexyloxy)-p-phenylene-vinylene (MEH-PPV) conjugated polymer and fullerene (C 60 ) composite system. Charge dynamics associated with the percolation threshold was studied in this work by means of time-of-flight (TOF) measurements of the charge carrier mobilities. The hole mobility showed little change up to a fullerene concentration of 1 wt.%. On the other hand, the electron mobility increased with increasing fullerene concentration and exhibited a critical behavior with a maximum at a percolation threshold of 0.8 wt.%, at which a minimum in the energetic disorder took place. ",

keywords = "Charge dynamics, Fullerene-doped MEH-PPV conjugated polymers, Percolation threshold",

author = "Mo, {Kyu Hyun} and Choi, {Dong Min} and Lee, {Cheol Eui}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (Project No. 2016R1D1A1A 09917003). The Korea Basic Science Institute (KBSI) is acknowledged for the measurements. Publisher Copyright: {\textcopyright} 2019, The Korean Physical Society.",

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AU - Mo, Kyu Hyun

AU - Choi, Dong Min

AU - Lee, Cheol Eui

N1 - Funding Information: This work was supported by the National Research Foundation of Korea (Project No. 2016R1D1A1A 09917003). The Korea Basic Science Institute (KBSI) is acknowledged for the measurements. Publisher Copyright: © 2019, The Korean Physical Society.

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Y1 - 2019/3/1

N2 - A fullerene percolation threshold has been identified in the current density-voltage (J-V) characteristics of a 5-(2’-ethyl-hexyloxy)-p-phenylene-vinylene (MEH-PPV) conjugated polymer and fullerene (C 60 ) composite system. Charge dynamics associated with the percolation threshold was studied in this work by means of time-of-flight (TOF) measurements of the charge carrier mobilities. The hole mobility showed little change up to a fullerene concentration of 1 wt.%. On the other hand, the electron mobility increased with increasing fullerene concentration and exhibited a critical behavior with a maximum at a percolation threshold of 0.8 wt.%, at which a minimum in the energetic disorder took place.

AB - A fullerene percolation threshold has been identified in the current density-voltage (J-V) characteristics of a 5-(2’-ethyl-hexyloxy)-p-phenylene-vinylene (MEH-PPV) conjugated polymer and fullerene (C 60 ) composite system. Charge dynamics associated with the percolation threshold was studied in this work by means of time-of-flight (TOF) measurements of the charge carrier mobilities. The hole mobility showed little change up to a fullerene concentration of 1 wt.%. On the other hand, the electron mobility increased with increasing fullerene concentration and exhibited a critical behavior with a maximum at a percolation threshold of 0.8 wt.%, at which a minimum in the energetic disorder took place.

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KW - Fullerene-doped MEH-PPV conjugated polymers

KW - Percolation threshold

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Charge Dynamics Study of the Percolation Threshold in a Polymer-Fullerene Composite System

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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