Magnetic field effect on photoconductivity of single-crystalline pentacene and perfluoropentacene field-effect transistors

Song Toan Pham; Yoshitaka Kawasugi; Hirokazu Tada

doi:10.1557/opl.2012.501

Magnetic field effect on photoconductivity of single-crystalline pentacene and perfluoropentacene field-effect transistors

Song Toan Pham, Yoshitaka Kawasugi, Hirokazu Tada

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Organic magnetoresistance (OMAR) of single-crystalline (SC) pentacene (C₂₂H₁₄) and perfluoropentacene (C₂₂F ₁₄) was studied using field-effect transistor structures. The gate voltage effect showed that the OMAR originates from photo-induced current and requires both electrons and holes in the transport channel. The temperature dependence showed the maximum magnetoresistance (MR) ratio up to -6% under light irradiation at approximately 200 K and magnetic field of 80 mT. The charge carrier mobility and the exciton diffusion length were not important factors to determine the MR ratios. The interaction between triplet excitons and traps was thought to govern the OMAR behaviors.

Original language	English
Title of host publication	Charge Generation/Transport in Organic Semiconductor Materials
Pages	95-99
Number of pages	5
DOIs	https://doi.org/10.1557/opl.2012.501
Publication status	Published - 2011 Dec 1
Event	2011 MRS Fall Meeting - Boston, MA, United States Duration: 2011 Nov 28 → 2012 Dec 2

Publication series

Name	Materials Research Society Symposium Proceedings
Volume	1402
ISSN (Print)	0272-9172

Other

Other	2011 MRS Fall Meeting
Country/Territory	United States
City	Boston, MA
Period	11/11/28 → 12/12/2

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1557/opl.2012.501

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Magnetic field effect on photoconductivity of single-crystalline pentacene and perfluoropentacene field-effect transistors. / Pham, Song Toan; Kawasugi, Yoshitaka; Tada, Hirokazu.

Charge Generation/Transport in Organic Semiconductor Materials. 2011. p. 95-99 (Materials Research Society Symposium Proceedings; Vol. 1402).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Pham, ST, Kawasugi, Y & Tada, H 2011, Magnetic field effect on photoconductivity of single-crystalline pentacene and perfluoropentacene field-effect transistors. in Charge Generation/Transport in Organic Semiconductor Materials. Materials Research Society Symposium Proceedings, vol. 1402, pp. 95-99, 2011 MRS Fall Meeting, Boston, MA, United States, 11/11/28. https://doi.org/10.1557/opl.2012.501

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abstract = "Organic magnetoresistance (OMAR) of single-crystalline (SC) pentacene (C22H14) and perfluoropentacene (C22F 14) was studied using field-effect transistor structures. The gate voltage effect showed that the OMAR originates from photo-induced current and requires both electrons and holes in the transport channel. The temperature dependence showed the maximum magnetoresistance (MR) ratio up to -6% under light irradiation at approximately 200 K and magnetic field of 80 mT. The charge carrier mobility and the exciton diffusion length were not important factors to determine the MR ratios. The interaction between triplet excitons and traps was thought to govern the OMAR behaviors.",

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AU - Tada, Hirokazu

PY - 2011/12/1

Y1 - 2011/12/1

N2 - Organic magnetoresistance (OMAR) of single-crystalline (SC) pentacene (C22H14) and perfluoropentacene (C22F 14) was studied using field-effect transistor structures. The gate voltage effect showed that the OMAR originates from photo-induced current and requires both electrons and holes in the transport channel. The temperature dependence showed the maximum magnetoresistance (MR) ratio up to -6% under light irradiation at approximately 200 K and magnetic field of 80 mT. The charge carrier mobility and the exciton diffusion length were not important factors to determine the MR ratios. The interaction between triplet excitons and traps was thought to govern the OMAR behaviors.

AB - Organic magnetoresistance (OMAR) of single-crystalline (SC) pentacene (C22H14) and perfluoropentacene (C22F 14) was studied using field-effect transistor structures. The gate voltage effect showed that the OMAR originates from photo-induced current and requires both electrons and holes in the transport channel. The temperature dependence showed the maximum magnetoresistance (MR) ratio up to -6% under light irradiation at approximately 200 K and magnetic field of 80 mT. The charge carrier mobility and the exciton diffusion length were not important factors to determine the MR ratios. The interaction between triplet excitons and traps was thought to govern the OMAR behaviors.

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Magnetic field effect on photoconductivity of single-crystalline pentacene and perfluoropentacene field-effect transistors

Abstract

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