Dispersive charge transport due to strong charge-dipole interactions of cyano-group in the cyano-carbazole based molecular glass

Dong Keun Oh; Sung Mok Hong; Cheol Eui Lee; B. S. Kim; J. I. Jin

doi:10.1016/j.ssc.2005.09.030

Dispersive charge transport due to strong charge-dipole interactions of cyano-group in the cyano-carbazole based molecular glass

Dong Keun Oh, Sung Mok Hong, Cheol Eui Lee, B. S. Kim, J. I. Jin

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

4 Citations (Scopus)

Abstract

Using the time of flight (ToF) method, we investigated the bipolar charge transport for two glass-forming molecules containing carbazole and cyano-carbazole moiety. The enhanced electron mobility was observed in the cyano-carbazole compound. From the numerical method based the Laplace formalism, the distribution of hole trapping energy was obtained for the carbazole compound. This result was compared with the exponential distribution extracted from dispersion parameter for the cyano-carbazole material. Considering charge-dipole interactions as a reason for the disordered trapping mechanism, we discussed dispersive charge transport induced by a strong dipolar (i.e. cyano) group by comparing the distributions of hole trapping sites for two compounds.

Original language	English
Pages (from-to)	585-590
Number of pages	6
Journal	Solid State Communications
Volume	136
Issue number	11-12
DOIs	https://doi.org/10.1016/j.ssc.2005.09.030
Publication status	Published - 2005 Dec

Bibliographical note

Funding Information:
This work is supported by the Material Science Collaboration Research fund of KBSI, Research Foundation Grant for basic science support (KRF-2002-015-CP0125) and the Korea Science and Engineering Foundation through CRM of Korea University.

Keywords

A. Disordered system
A. Organic glasses
D. Electronic transport
D. Recombination and trapping

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
Materials Chemistry

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10.1016/j.ssc.2005.09.030

Cite this

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title = "Dispersive charge transport due to strong charge-dipole interactions of cyano-group in the cyano-carbazole based molecular glass",

abstract = "Using the time of flight (ToF) method, we investigated the bipolar charge transport for two glass-forming molecules containing carbazole and cyano-carbazole moiety. The enhanced electron mobility was observed in the cyano-carbazole compound. From the numerical method based the Laplace formalism, the distribution of hole trapping energy was obtained for the carbazole compound. This result was compared with the exponential distribution extracted from dispersion parameter for the cyano-carbazole material. Considering charge-dipole interactions as a reason for the disordered trapping mechanism, we discussed dispersive charge transport induced by a strong dipolar (i.e. cyano) group by comparing the distributions of hole trapping sites for two compounds.",

keywords = "A. Disordered system, A. Organic glasses, D. Electronic transport, D. Recombination and trapping",

author = "Oh, {Dong Keun} and Hong, {Sung Mok} and Lee, {Cheol Eui} and Kim, {B. S.} and Jin, {J. I.}",

note = "Funding Information: This work is supported by the Material Science Collaboration Research fund of KBSI, Research Foundation Grant for basic science support (KRF-2002-015-CP0125) and the Korea Science and Engineering Foundation through CRM of Korea University.",

year = "2005",

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doi = "10.1016/j.ssc.2005.09.030",

language = "English",

volume = "136",

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T1 - Dispersive charge transport due to strong charge-dipole interactions of cyano-group in the cyano-carbazole based molecular glass

AU - Oh, Dong Keun

AU - Hong, Sung Mok

AU - Lee, Cheol Eui

AU - Kim, B. S.

AU - Jin, J. I.

N1 - Funding Information: This work is supported by the Material Science Collaboration Research fund of KBSI, Research Foundation Grant for basic science support (KRF-2002-015-CP0125) and the Korea Science and Engineering Foundation through CRM of Korea University.

PY - 2005/12

Y1 - 2005/12

N2 - Using the time of flight (ToF) method, we investigated the bipolar charge transport for two glass-forming molecules containing carbazole and cyano-carbazole moiety. The enhanced electron mobility was observed in the cyano-carbazole compound. From the numerical method based the Laplace formalism, the distribution of hole trapping energy was obtained for the carbazole compound. This result was compared with the exponential distribution extracted from dispersion parameter for the cyano-carbazole material. Considering charge-dipole interactions as a reason for the disordered trapping mechanism, we discussed dispersive charge transport induced by a strong dipolar (i.e. cyano) group by comparing the distributions of hole trapping sites for two compounds.

AB - Using the time of flight (ToF) method, we investigated the bipolar charge transport for two glass-forming molecules containing carbazole and cyano-carbazole moiety. The enhanced electron mobility was observed in the cyano-carbazole compound. From the numerical method based the Laplace formalism, the distribution of hole trapping energy was obtained for the carbazole compound. This result was compared with the exponential distribution extracted from dispersion parameter for the cyano-carbazole material. Considering charge-dipole interactions as a reason for the disordered trapping mechanism, we discussed dispersive charge transport induced by a strong dipolar (i.e. cyano) group by comparing the distributions of hole trapping sites for two compounds.

KW - A. Disordered system

KW - A. Organic glasses

KW - D. Electronic transport

KW - D. Recombination and trapping

UR - http://www.scopus.com/inward/record.url?scp=28244473799&partnerID=8YFLogxK

U2 - 10.1016/j.ssc.2005.09.030

DO - 10.1016/j.ssc.2005.09.030

M3 - Article

AN - SCOPUS:28244473799

SN - 0038-1098

VL - 136

SP - 585

EP - 590

JO - Solid State Communications

JF - Solid State Communications

IS - 11-12

ER -

Dispersive charge transport due to strong charge-dipole interactions of cyano-group in the cyano-carbazole based molecular glass

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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