Enhancement of piezo-related properties of AlN through combinatorial AlN–TiN nanocolumn composite composition spread

Hsin Yi Lee, Siang Yun Lee, Kao-Shuo Chang

Research output: Contribution to journalArticle

Abstract

In this study, a combinatorial AlN–TiN nanocolumn composite composition spread (library) was fabricated using reactive sputtering, and the formation of TixAl1–xN at the interface between AlN and TiN thickness gradients was investigated. Moreover, the intimate coupling between TixAl1–xN, AlN, and TiN, which enhanced the piezo-related properties of AlN, was analyzed. Location 1 [(1 − x)AlN − xTiN, 0 < x < 0.03] on the library exhibited superior piezotronic and piezophototronic effects because of the piezopotential modulation at the two ends of the nanocolumn. The location also exhibited excellent reliability and the highest piezophotodegradation coefficient k of approximately 7.5 × 10−3/min for all samples under study. The improved piezophotodegradation reaction was a result of the enhanced optical absorption, reduced recombination of photogenerated electron–hole pairs, and intimate coupling between TixAl1–xN, AlN, and TiN. Moreover, the applied bias photon-to-current efficiency of the piezophotoelectrochemical reaction at Location 1 was approximately 14 times higher than the efficiency of the photoelectrochemical (PEC) reaction under a bias of 0.5 V (versus Pt). The improvement was due to the favorable valence band position for water splitting and the enhanced piezophototronic effect. The study of the PEC reactions indicates the novel environmental sustainability of (1 − x)AlN − xTiN (0 < x < 0.03) on the library.

Original languageEnglish
Pages (from-to)22744-22751
Number of pages8
JournalCeramics International
Volume45
Issue number17
DOIs
Publication statusPublished - 2019 Dec 1

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Composite materials
Chemical analysis
Reactive sputtering
Valence bands
Light absorption
Sustainable development
Photons
Modulation
Water

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

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title = "Enhancement of piezo-related properties of AlN through combinatorial AlN–TiN nanocolumn composite composition spread",
abstract = "In this study, a combinatorial AlN–TiN nanocolumn composite composition spread (library) was fabricated using reactive sputtering, and the formation of TixAl1–xN at the interface between AlN and TiN thickness gradients was investigated. Moreover, the intimate coupling between TixAl1–xN, AlN, and TiN, which enhanced the piezo-related properties of AlN, was analyzed. Location 1 [(1 − x)AlN − xTiN, 0 < x < 0.03] on the library exhibited superior piezotronic and piezophototronic effects because of the piezopotential modulation at the two ends of the nanocolumn. The location also exhibited excellent reliability and the highest piezophotodegradation coefficient k of approximately 7.5 × 10−3/min for all samples under study. The improved piezophotodegradation reaction was a result of the enhanced optical absorption, reduced recombination of photogenerated electron–hole pairs, and intimate coupling between TixAl1–xN, AlN, and TiN. Moreover, the applied bias photon-to-current efficiency of the piezophotoelectrochemical reaction at Location 1 was approximately 14 times higher than the efficiency of the photoelectrochemical (PEC) reaction under a bias of 0.5 V (versus Pt). The improvement was due to the favorable valence band position for water splitting and the enhanced piezophototronic effect. The study of the PEC reactions indicates the novel environmental sustainability of (1 − x)AlN − xTiN (0 < x < 0.03) on the library.",
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Enhancement of piezo-related properties of AlN through combinatorial AlN–TiN nanocolumn composite composition spread. / Lee, Hsin Yi; Lee, Siang Yun; Chang, Kao-Shuo.

In: Ceramics International, Vol. 45, No. 17, 01.12.2019, p. 22744-22751.

Research output: Contribution to journalArticle

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AU - Lee, Hsin Yi

AU - Lee, Siang Yun

AU - Chang, Kao-Shuo

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AB - In this study, a combinatorial AlN–TiN nanocolumn composite composition spread (library) was fabricated using reactive sputtering, and the formation of TixAl1–xN at the interface between AlN and TiN thickness gradients was investigated. Moreover, the intimate coupling between TixAl1–xN, AlN, and TiN, which enhanced the piezo-related properties of AlN, was analyzed. Location 1 [(1 − x)AlN − xTiN, 0 < x < 0.03] on the library exhibited superior piezotronic and piezophototronic effects because of the piezopotential modulation at the two ends of the nanocolumn. The location also exhibited excellent reliability and the highest piezophotodegradation coefficient k of approximately 7.5 × 10−3/min for all samples under study. The improved piezophotodegradation reaction was a result of the enhanced optical absorption, reduced recombination of photogenerated electron–hole pairs, and intimate coupling between TixAl1–xN, AlN, and TiN. Moreover, the applied bias photon-to-current efficiency of the piezophotoelectrochemical reaction at Location 1 was approximately 14 times higher than the efficiency of the photoelectrochemical (PEC) reaction under a bias of 0.5 V (versus Pt). The improvement was due to the favorable valence band position for water splitting and the enhanced piezophototronic effect. The study of the PEC reactions indicates the novel environmental sustainability of (1 − x)AlN − xTiN (0 < x < 0.03) on the library.

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