Towards a metallic top contact electrode in molecular electronic devices exhibiting a large surface coverage by photoreduction of silver cations

Martin, Santiago (Universidad de Zaragoza) ; Ballesteros, Luz M. ; Gonzalez-Orive, A. ; Oliva, H. ; Marques-Gonzalez, Santiago ; Lorenzoni, Matteo ; Nichols, Richard J. ; Perez-Murano, Francesc ; Low, Paul J. ; Cea, Pilar (Universidad de Zaragoza)

Resumen: In this contribution the photoreduction of silver ions coordinated onto a Langmuir–Blodgett monolayer is presented as an effective method for the deposition of the top contact electrode in metal/monolayer/metal devices. Silver cations were incorporated from an aqueous AgNO3 sub-phase of Langmuir films of 4,4'-(1,4-phenylenebis(ethyne-2,1-diyl))dibenzoic acid upon the transference of these films onto a metallic substrate. Subsequent irradiation of the silver-ion functionalized Langmuir–Blodgett films with 254 nm light results in the photoreduction of silver cations to produce metallic silver nanoparticles, which are distributed over the organic monolayer and exhibit a surface coverage as large as 76% of the monolayer surface. Electrical properties of these metal/monolayer/metal devices were determined by recording I–V curves, which show a sigmoidal behaviour indicative of well-behaved junctions free of metallic filaments and short-circuits. The integrity of the organic monolayer upon the irradiation process and formation of the silver top-contact electrode has also been demonstrated through cyclic voltammetry experiments.

Idioma: Inglés

DOI: 10.1039/c6tc03319a

Año: 2016

Publicado en: JOURNAL OF MATERIALS CHEMISTRY C 4, 38 (2016), 9036-9043
ISSN: 2050-7526

Factor impacto JCR: 5.256 (2016)

Categ. JCR: PHYSICS, APPLIED rank: 18 / 147 = 0.122 (2016) - Q1 - T1
Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 36 / 275 = 0.131 (2016) - Q1 - T1

Factor impacto SCIMAGO: 1.825 - Materials Chemistry (Q1) - Chemistry (miscellaneous) (Q1)

Financiación: info:eu-repo/grantAgreement/ES/CSIC/10-4E-805
Financiación: info:eu-repo/grantAgreement/ES/DGA/E54
Financiación: info:eu-repo/grantAgreement/ES/MINECO/CSD2010-00024
Financiación: info:eu-repo/grantAgreement/ES/MINECO/CTQ2012-33198
Financiación: info:eu-repo/grantAgreement/ES/MINECO/CTQ2012-50187-EXP

Tipo y forma: Article (PostPrint)

Área (Departamento): Área Química Física (Dpto. Química Física)