Tetranuclear yttrium and gadolinium 2-acetylcyclopentanoate clusters: Synthesis and their use as spin-coating precursors for metal oxide film formation for field-effect transistor fabrication

Elaheh Pousaneh, Andrea Preuss, Khaybar Assim, Tobias Rueffer, Marcus Korb, Jana Tittmann-Otto, Sascha Hermann, Stefan E. Schulz, Heinrich Lang

Research output: Contribution to journalArticle

Abstract

Lanthanide clusters [Ln(4)(mu(3)-OH)(2)(eta(2)-accp)(4)((mu-O)-eta(2)-accp)(6)](Ln = Y (4), Gd (5); accp = 2-acetylcyclopentanoate) are accessible by treatment of [M(NO3)(3)center dot 6H(2)O] (M = Y (1), Gd (2)) with 3 equiv. of Haccp (3) in presence of NaOH. The molecular structures of 4 and 5 in the solid-state are discussed. The thermal behavior of 4 and 5 was studied by TG under Ar and O-2, showing multistep decomposition processes. Additionally, DSC studies were carried out under an atmosphere of O-2. PXRD measurements of the TG residues confirm the formation of Ln(2)O(3). Spin-coating experiments were carried out with 4 and 5 for Ln(2)O(3) film deposition on silicon substrates. The layers are smooth, close and are of thicknesses of 18.87 +/- 1.13 nm and 25.59 +/- 4.55 nm for Ln = Y and Gd, which was evidenced by SEM and EDX studies. Field-effect transistors were successfully fabricated by deposition of carbon nanotubes on top of the Y2O3 films and formation of palladium contacts by a lift-off procedure. An on/off ratio of more than 4 orders of magnitude is achieved without considerable leakage currents. These results demonstrate the potential use of spin-coated Y2O3 as a gate dielectric in electronic devices. (C) 2018 Chinese Society of Rare Earths. Published by Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)1098-1105
Number of pages8
JournalJournal of Rare Earths
Volume36
Issue number10
DOIs
Publication statusPublished - Oct 2018
Externally publishedYes

Cite this

Pousaneh, Elaheh ; Preuss, Andrea ; Assim, Khaybar ; Rueffer, Tobias ; Korb, Marcus ; Tittmann-Otto, Jana ; Hermann, Sascha ; Schulz, Stefan E. ; Lang, Heinrich. / Tetranuclear yttrium and gadolinium 2-acetylcyclopentanoate clusters : Synthesis and their use as spin-coating precursors for metal oxide film formation for field-effect transistor fabrication. In: Journal of Rare Earths. 2018 ; Vol. 36, No. 10. pp. 1098-1105.
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title = "Tetranuclear yttrium and gadolinium 2-acetylcyclopentanoate clusters: Synthesis and their use as spin-coating precursors for metal oxide film formation for field-effect transistor fabrication",
abstract = "Lanthanide clusters [Ln(4)(mu(3)-OH)(2)(eta(2)-accp)(4)((mu-O)-eta(2)-accp)(6)](Ln = Y (4), Gd (5); accp = 2-acetylcyclopentanoate) are accessible by treatment of [M(NO3)(3)center dot 6H(2)O] (M = Y (1), Gd (2)) with 3 equiv. of Haccp (3) in presence of NaOH. The molecular structures of 4 and 5 in the solid-state are discussed. The thermal behavior of 4 and 5 was studied by TG under Ar and O-2, showing multistep decomposition processes. Additionally, DSC studies were carried out under an atmosphere of O-2. PXRD measurements of the TG residues confirm the formation of Ln(2)O(3). Spin-coating experiments were carried out with 4 and 5 for Ln(2)O(3) film deposition on silicon substrates. The layers are smooth, close and are of thicknesses of 18.87 +/- 1.13 nm and 25.59 +/- 4.55 nm for Ln = Y and Gd, which was evidenced by SEM and EDX studies. Field-effect transistors were successfully fabricated by deposition of carbon nanotubes on top of the Y2O3 films and formation of palladium contacts by a lift-off procedure. An on/off ratio of more than 4 orders of magnitude is achieved without considerable leakage currents. These results demonstrate the potential use of spin-coated Y2O3 as a gate dielectric in electronic devices. (C) 2018 Chinese Society of Rare Earths. Published by Elsevier B.V. All rights reserved.",
keywords = "beta-Diketonates, Yttrium, Gadolinium, Thermal analysis, Spin coating, CNT transistor, Y2O3 THIN-FILMS, STRUCTURAL-CHARACTERIZATION, LANTHANIDE CLUSTERS, OPTICAL-PROPERTIES, DEPOSITION, ACETYLACETONATE, COMPLEXES, EVOLUTION, GROWTH, SERIES",
author = "Elaheh Pousaneh and Andrea Preuss and Khaybar Assim and Tobias Rueffer and Marcus Korb and Jana Tittmann-Otto and Sascha Hermann and Schulz, {Stefan E.} and Heinrich Lang",
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Tetranuclear yttrium and gadolinium 2-acetylcyclopentanoate clusters : Synthesis and their use as spin-coating precursors for metal oxide film formation for field-effect transistor fabrication. / Pousaneh, Elaheh; Preuss, Andrea; Assim, Khaybar; Rueffer, Tobias; Korb, Marcus; Tittmann-Otto, Jana; Hermann, Sascha; Schulz, Stefan E.; Lang, Heinrich.

In: Journal of Rare Earths, Vol. 36, No. 10, 10.2018, p. 1098-1105.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Tetranuclear yttrium and gadolinium 2-acetylcyclopentanoate clusters

T2 - Synthesis and their use as spin-coating precursors for metal oxide film formation for field-effect transistor fabrication

AU - Pousaneh, Elaheh

AU - Preuss, Andrea

AU - Assim, Khaybar

AU - Rueffer, Tobias

AU - Korb, Marcus

AU - Tittmann-Otto, Jana

AU - Hermann, Sascha

AU - Schulz, Stefan E.

AU - Lang, Heinrich

PY - 2018/10

Y1 - 2018/10

N2 - Lanthanide clusters [Ln(4)(mu(3)-OH)(2)(eta(2)-accp)(4)((mu-O)-eta(2)-accp)(6)](Ln = Y (4), Gd (5); accp = 2-acetylcyclopentanoate) are accessible by treatment of [M(NO3)(3)center dot 6H(2)O] (M = Y (1), Gd (2)) with 3 equiv. of Haccp (3) in presence of NaOH. The molecular structures of 4 and 5 in the solid-state are discussed. The thermal behavior of 4 and 5 was studied by TG under Ar and O-2, showing multistep decomposition processes. Additionally, DSC studies were carried out under an atmosphere of O-2. PXRD measurements of the TG residues confirm the formation of Ln(2)O(3). Spin-coating experiments were carried out with 4 and 5 for Ln(2)O(3) film deposition on silicon substrates. The layers are smooth, close and are of thicknesses of 18.87 +/- 1.13 nm and 25.59 +/- 4.55 nm for Ln = Y and Gd, which was evidenced by SEM and EDX studies. Field-effect transistors were successfully fabricated by deposition of carbon nanotubes on top of the Y2O3 films and formation of palladium contacts by a lift-off procedure. An on/off ratio of more than 4 orders of magnitude is achieved without considerable leakage currents. These results demonstrate the potential use of spin-coated Y2O3 as a gate dielectric in electronic devices. (C) 2018 Chinese Society of Rare Earths. Published by Elsevier B.V. All rights reserved.

AB - Lanthanide clusters [Ln(4)(mu(3)-OH)(2)(eta(2)-accp)(4)((mu-O)-eta(2)-accp)(6)](Ln = Y (4), Gd (5); accp = 2-acetylcyclopentanoate) are accessible by treatment of [M(NO3)(3)center dot 6H(2)O] (M = Y (1), Gd (2)) with 3 equiv. of Haccp (3) in presence of NaOH. The molecular structures of 4 and 5 in the solid-state are discussed. The thermal behavior of 4 and 5 was studied by TG under Ar and O-2, showing multistep decomposition processes. Additionally, DSC studies were carried out under an atmosphere of O-2. PXRD measurements of the TG residues confirm the formation of Ln(2)O(3). Spin-coating experiments were carried out with 4 and 5 for Ln(2)O(3) film deposition on silicon substrates. The layers are smooth, close and are of thicknesses of 18.87 +/- 1.13 nm and 25.59 +/- 4.55 nm for Ln = Y and Gd, which was evidenced by SEM and EDX studies. Field-effect transistors were successfully fabricated by deposition of carbon nanotubes on top of the Y2O3 films and formation of palladium contacts by a lift-off procedure. An on/off ratio of more than 4 orders of magnitude is achieved without considerable leakage currents. These results demonstrate the potential use of spin-coated Y2O3 as a gate dielectric in electronic devices. (C) 2018 Chinese Society of Rare Earths. Published by Elsevier B.V. All rights reserved.

KW - beta-Diketonates

KW - Yttrium

KW - Gadolinium

KW - Thermal analysis

KW - Spin coating

KW - CNT transistor

KW - Y2O3 THIN-FILMS

KW - STRUCTURAL-CHARACTERIZATION

KW - LANTHANIDE CLUSTERS

KW - OPTICAL-PROPERTIES

KW - DEPOSITION

KW - ACETYLACETONATE

KW - COMPLEXES

KW - EVOLUTION

KW - GROWTH

KW - SERIES

U2 - 10.1016/j.jre.2018.02.010

DO - 10.1016/j.jre.2018.02.010

M3 - Article

VL - 36

SP - 1098

EP - 1105

JO - Journal of Rare Earths

JF - Journal of Rare Earths

SN - 1000-4343

IS - 10

ER -