Tailoring Al-SiO2 interfacial work function using an organophosphonate nanolayer

Matthew Kwan; Roy Winter; P. Hubert Mutin; Moshe Eizenberg; Ganpati Ramanath

doi:10.1063/1.4995433

Tailoring Al-SiO₂ interfacial work function using an organophosphonate nanolayer

Matthew Kwan, Roy Winter, P. Hubert Mutin, Moshe Eizenberg, Ganpati Ramanath^*

^*Corresponding author for this work

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

3 Scopus citations

Abstract

We show that introducing a mercaptan-terminated organophosphonate nanomolecular layer (NML) at the Al-SiO₂ interface decreases the effective metal work function Φ_eff by 0.67 eV. In contrast, introducing a methyl-terminated organophosphonate NML has a negligible impact on Φ_eff. Photoelectron spectroscopy of NML-tailored surfaces and Al-NML-SiO₂ interfaces indicate that Al bonds with oxidized mercaptan moieties form Al-O-S bridges, which determine the Φ_eff shift. Our findings should be useful for molecularly tailoring the electronic properties of metal-ceramic interfaces for electronics and energy device applications.

Original language	English
Article number	121602
Journal	Applied Physics Letters
Volume	111
Issue number	12
DOIs	https://doi.org/10.1063/1.4995433
State	Published - 18 Sep 2017
Externally published	Yes

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title = "Tailoring Al-SiO2 interfacial work function using an organophosphonate nanolayer",

abstract = "We show that introducing a mercaptan-terminated organophosphonate nanomolecular layer (NML) at the Al-SiO2 interface decreases the effective metal work function Φeff by 0.67 eV. In contrast, introducing a methyl-terminated organophosphonate NML has a negligible impact on Φeff. Photoelectron spectroscopy of NML-tailored surfaces and Al-NML-SiO2 interfaces indicate that Al bonds with oxidized mercaptan moieties form Al-O-S bridges, which determine the Φeff shift. Our findings should be useful for molecularly tailoring the electronic properties of metal-ceramic interfaces for electronics and energy device applications.",

author = "Matthew Kwan and Roy Winter and Mutin, {P. Hubert} and Moshe Eizenberg and Ganpati Ramanath",

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AU - Kwan, Matthew

AU - Winter, Roy

AU - Mutin, P. Hubert

AU - Eizenberg, Moshe

AU - Ramanath, Ganpati

PY - 2017/9/18

Y1 - 2017/9/18

N2 - We show that introducing a mercaptan-terminated organophosphonate nanomolecular layer (NML) at the Al-SiO2 interface decreases the effective metal work function Φeff by 0.67 eV. In contrast, introducing a methyl-terminated organophosphonate NML has a negligible impact on Φeff. Photoelectron spectroscopy of NML-tailored surfaces and Al-NML-SiO2 interfaces indicate that Al bonds with oxidized mercaptan moieties form Al-O-S bridges, which determine the Φeff shift. Our findings should be useful for molecularly tailoring the electronic properties of metal-ceramic interfaces for electronics and energy device applications.

AB - We show that introducing a mercaptan-terminated organophosphonate nanomolecular layer (NML) at the Al-SiO2 interface decreases the effective metal work function Φeff by 0.67 eV. In contrast, introducing a methyl-terminated organophosphonate NML has a negligible impact on Φeff. Photoelectron spectroscopy of NML-tailored surfaces and Al-NML-SiO2 interfaces indicate that Al bonds with oxidized mercaptan moieties form Al-O-S bridges, which determine the Φeff shift. Our findings should be useful for molecularly tailoring the electronic properties of metal-ceramic interfaces for electronics and energy device applications.

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VL - 111

JO - Applied Physics Letters

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ER -

Tailoring Al-SiO₂ interfacial work function using an organophosphonate nanolayer

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