On the role of hydrogen in organic magnetoresistance: A study of C60 devices

T. D. Nguyen; Y. Sheng; M. Wohlgenannt; T. D. Anthopoulos

doi:10.1016/j.synthmet.2007.09.002

On the role of hydrogen in organic magnetoresistance: A study of C₆₀ devices

T. D. Nguyen, Y. Sheng, M. Wohlgenannt^*, T. D. Anthopoulos

^*Corresponding author for this work

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

28 Scopus citations

Abstract

The organic magnetoresistive (OMAR) effect has been observed in many different organic semiconductors, whereas a corresponding effect has not been reported for inorganic ones. What property makes organics behave so differently regarding magnetotransport? By studying C₆₀ devices using several different electrode materials we show that C₆₀, unlike many other organic semiconductors, does not exhibit any intrinsic OMAR effect. However, we find that as soon as the carriers in C₆₀ are brought in proximity with hydrogen-containing compounds, either in the form of a polymeric electrode, or side-chain substituents, a weak OMAR effect is observed. This shows that hydrogen is crucial for the observation of OMAR.

Original language	English (US)
Pages (from-to)	930-934
Number of pages	5
Journal	Synthetic Metals
Volume	157
Issue number	22-23
DOIs	https://doi.org/10.1016/j.synthmet.2007.09.002
State	Published - Nov 2007
Externally published	Yes

Keywords

Carbon-60
Fullerene
Hyperfine
OMAR
Organic magnetoresistance
PCBM

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.synthmet.2007.09.002

Cite this

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title = "On the role of hydrogen in organic magnetoresistance: A study of C60 devices",

abstract = "The organic magnetoresistive (OMAR) effect has been observed in many different organic semiconductors, whereas a corresponding effect has not been reported for inorganic ones. What property makes organics behave so differently regarding magnetotransport? By studying C60 devices using several different electrode materials we show that C60, unlike many other organic semiconductors, does not exhibit any intrinsic OMAR effect. However, we find that as soon as the carriers in C60 are brought in proximity with hydrogen-containing compounds, either in the form of a polymeric electrode, or side-chain substituents, a weak OMAR effect is observed. This shows that hydrogen is crucial for the observation of OMAR.",

keywords = "Carbon-60, Fullerene, Hyperfine, OMAR, Organic magnetoresistance, PCBM",

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AU - Sheng, Y.

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AU - Anthopoulos, T. D.

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AB - The organic magnetoresistive (OMAR) effect has been observed in many different organic semiconductors, whereas a corresponding effect has not been reported for inorganic ones. What property makes organics behave so differently regarding magnetotransport? By studying C60 devices using several different electrode materials we show that C60, unlike many other organic semiconductors, does not exhibit any intrinsic OMAR effect. However, we find that as soon as the carriers in C60 are brought in proximity with hydrogen-containing compounds, either in the form of a polymeric electrode, or side-chain substituents, a weak OMAR effect is observed. This shows that hydrogen is crucial for the observation of OMAR.

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