Impedance spectroscopy on copper phthalocyanine diodes with surface-induced molecular orientation

Chang Hyun Kim; Htay Hlaing; Shyuan Yang; Yvan Bonnassieux; Gilles Horowitz; Ioannis Kymissis

doi:10.1016/j.orgel.2014.04.039

Impedance spectroscopy on copper phthalocyanine diodes with surface-induced molecular orientation

Chang Hyun Kim
, Htay Hlaing
, Shyuan Yang
, Yvan Bonnassieux
, Gilles Horowitz
, Ioannis Kymissis

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

Abstract

Molecular orientation and packing motif governs charge-transport property of organic semiconductor films, especially for planar small molecules. We analyze the surface-induced orientation of copper phthalocyannine (CuPc) molecules deposited on graphene or poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) covered indium-tin-oxide (PEDOT:PSS/ITO). The CuPc films deposited on graphene are templated with preferential face-on stacking, whereas the molecules on PEDOT:PSS/ITO crystallize with edge-on ordering. Static current-voltage measurement and small-signal impedance spectroscopy are combined to elucidate the structural impact on the electrical response when those films are part of a rectifying diode. The graphene-templated diode shows enhanced out-of-plane hole conduction as compared to the diode with a PEDOT:PSS/ITO contact. Equivalent circuits describing charge injection and transport properties are proposed.

Original language	English
Pages (from-to)	1724-1730
Number of pages	7
Journal	Organic Electronics
Volume	15
Issue number	8
DOIs	https://doi.org/10.1016/j.orgel.2014.04.039
Publication status	Published - 1 Jan 2014

Keywords

Equivalent circuit modeling
Graphene electrodes
Impedance spectroscopy
Molecular orientation
Organic diodes

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10.1016/j.orgel.2014.04.039

Cite this

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title = "Impedance spectroscopy on copper phthalocyanine diodes with surface-induced molecular orientation",

abstract = "Molecular orientation and packing motif governs charge-transport property of organic semiconductor films, especially for planar small molecules. We analyze the surface-induced orientation of copper phthalocyannine (CuPc) molecules deposited on graphene or poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) covered indium-tin-oxide (PEDOT:PSS/ITO). The CuPc films deposited on graphene are templated with preferential face-on stacking, whereas the molecules on PEDOT:PSS/ITO crystallize with edge-on ordering. Static current-voltage measurement and small-signal impedance spectroscopy are combined to elucidate the structural impact on the electrical response when those films are part of a rectifying diode. The graphene-templated diode shows enhanced out-of-plane hole conduction as compared to the diode with a PEDOT:PSS/ITO contact. Equivalent circuits describing charge injection and transport properties are proposed.",

keywords = "Equivalent circuit modeling, Graphene electrodes, Impedance spectroscopy, Molecular orientation, Organic diodes",

author = "Kim, \{Chang Hyun\} and Htay Hlaing and Shyuan Yang and Yvan Bonnassieux and Gilles Horowitz and Ioannis Kymissis",

year = "2014",

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doi = "10.1016/j.orgel.2014.04.039",

language = "English",

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T1 - Impedance spectroscopy on copper phthalocyanine diodes with surface-induced molecular orientation

AU - Kim, Chang Hyun

AU - Hlaing, Htay

AU - Yang, Shyuan

AU - Bonnassieux, Yvan

AU - Horowitz, Gilles

AU - Kymissis, Ioannis

PY - 2014/1/1

Y1 - 2014/1/1

N2 - Molecular orientation and packing motif governs charge-transport property of organic semiconductor films, especially for planar small molecules. We analyze the surface-induced orientation of copper phthalocyannine (CuPc) molecules deposited on graphene or poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) covered indium-tin-oxide (PEDOT:PSS/ITO). The CuPc films deposited on graphene are templated with preferential face-on stacking, whereas the molecules on PEDOT:PSS/ITO crystallize with edge-on ordering. Static current-voltage measurement and small-signal impedance spectroscopy are combined to elucidate the structural impact on the electrical response when those films are part of a rectifying diode. The graphene-templated diode shows enhanced out-of-plane hole conduction as compared to the diode with a PEDOT:PSS/ITO contact. Equivalent circuits describing charge injection and transport properties are proposed.

AB - Molecular orientation and packing motif governs charge-transport property of organic semiconductor films, especially for planar small molecules. We analyze the surface-induced orientation of copper phthalocyannine (CuPc) molecules deposited on graphene or poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) covered indium-tin-oxide (PEDOT:PSS/ITO). The CuPc films deposited on graphene are templated with preferential face-on stacking, whereas the molecules on PEDOT:PSS/ITO crystallize with edge-on ordering. Static current-voltage measurement and small-signal impedance spectroscopy are combined to elucidate the structural impact on the electrical response when those films are part of a rectifying diode. The graphene-templated diode shows enhanced out-of-plane hole conduction as compared to the diode with a PEDOT:PSS/ITO contact. Equivalent circuits describing charge injection and transport properties are proposed.

KW - Equivalent circuit modeling

KW - Graphene electrodes

KW - Impedance spectroscopy

KW - Molecular orientation

KW - Organic diodes

U2 - 10.1016/j.orgel.2014.04.039

DO - 10.1016/j.orgel.2014.04.039

M3 - Article

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SN - 1566-1199

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SP - 1724

EP - 1730

JO - Organic Electronics

JF - Organic Electronics

IS - 8

ER -

Impedance spectroscopy on copper phthalocyanine diodes with surface-induced molecular orientation

Abstract

Keywords

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