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Oxidation of Planar and Plasmonic Ag Surfaces by Exposure toO2/Ar Plasma for Organic Optoelectronic Applications

Published online by Cambridge University Press:  04 February 2016

Christopher E. Petoukhoff ,
Catherine Antonick ,
Bala Murali Krishna M. ,
Keshav M. Dani  and
Deirdre M. O'Carroll
Christopher E. Petoukhoff*
Affiliation:
Department of Materials Science and Engineering, Rutgers University, 607 Taylor Road, Piscataway, NJ 08854, U.S.A. Femtosecond Spectroscopy Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa, 904-0495, Japan
Catherine Antonick
Affiliation:
Department of Materials Science and Engineering, Rutgers University, 607 Taylor Road, Piscataway, NJ 08854, U.S.A.
Bala Murali Krishna M.
Affiliation:
Femtosecond Spectroscopy Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa, 904-0495, Japan
Keshav M. Dani
Affiliation:
Femtosecond Spectroscopy Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa, 904-0495, Japan
Deirdre M. O'Carroll
Affiliation:
Department of Materials Science and Engineering, Rutgers University, 607 Taylor Road, Piscataway, NJ 08854, U.S.A. Department of Chemistry and Chemical Biology, Rutgers University, 610 Taylor Road, Piscataway, NJ 08854, U.S.A.
*
*(Email: cpetoukhoff@gmail.com)
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Abstract

Here, we expose planar and plasmonic Ag surfaces to a low-power O2/Arplasma to form an ultrathin surface oxide layer. We study the chemical state andmorphology of the plasma-treated Ag surfaces using X-ray photoelectronspectroscopy, scanning electron microscopy, and dark-field microscopy. Weobserve the formation of an ultrathin layer (< 10 nm) composed of both AgOx and Ag2CO3 for a plasma exposure time of 1 s byinvestigating shifts in the Ag3d, O1s, and C1s core level binding energies. Foran exposure time of 1 s, the surface structure of the planar and plasmonic Agsurfaces remains unchanged. For exposure times of 5 - 30 s, the planar Agsurfaces become porous and exhibit increased surface roughness. We demonstratethat the plasma-treated planar and plasmonic Ag surfaces lead to improvements inthe excited-state population of a polymer:fullerene coating through ultrafastpump-probe reflectometry.

Keywords

x-ray photoelectron spectroscopy (XPS)oxidationoptoelectronic

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Type
Articles
Information
MRS Advances , Volume 1 , Issue 14: Energy and Sustainability , 2016 , pp. 943 - 948
Copyright
Copyright © Materials Research Society 2016 

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References

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