Preparation of Delafossite-Type CuYO2 Films by Solution Method

Tsuboi, Nobuyuki; Tosaka, Kenichi; Kobayashi, Satoshi; Kato, Keizo; Kaneko, Futao

doi:10.1143/jjap.47.588

Cited by 17 publications

(6 citation statements)

References 10 publications

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“…As mentioned previously, the fraction volume ratio of CuYO 2 crystalline is thought to be low, thus, the optical bandgap of the film is thought to be determined by properties of the amorphous Y 2 O 3 fraction that have significantly higher fraction volume ratio than CuYO 2 crystalline in the film. The structural property dependency on the annealing temperature observed in the present work is not consistent with previously reported sol-gel preparation of CuYO 2 films [5]. It is because the synthesis of CuYO 2 is directly from Cu-Y-gel, not from the Cu 2 Y 2 O 5 that is promptly formed by the annealing of gel films in air before the annealing under nitrogen flow.…”

Section: Resultscontrasting

confidence: 96%

“…The film exhibited a broad emission band with a broad peak at photon energy of 2.3 eV. The spectrum is very similar to previously reported CuYO 2 films [5]. Although the preparation details are different, the CuYO 2 film prepared in the present work has similar optical properties with previous works.…”

Section: Resultssupporting

confidence: 87%

“…CuYO 2 is one of p-type TCO having delafossite structure, which has been prepared by some methods. For example, solid phase reaction of CuO and Y 2 O 3 though Cu 2 Y 2 O 5 [4] and so-gel method using copper nitrate and yttrium nitrate as metal sources, employing air and nitrogen-flow two steps annealing [5] have been reported. The CuYO 2 films have displayed green PL properties that have a peak at 540 nm (2.3 eV).…”

Section: Introductionmentioning

confidence: 99%

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Preparation of CuYO2 Thin Films by Sol-Gel Method Using Copper Acetate and Yttrium Acetate as Metal Sources

Ehara¹

2016

MSCE

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Delafossite structured p-type wide bandgap semiconductor, CuYO2 thin films were prepared on SiO2 substrate by sol-gel method using copper (II) acetate and yttrium (III) acetate as source materials. The films preparation process was studied by varying annealing temperature after the preparation of gel films by spin coating, followed by thermal annealing at higher temperature. In the present work, one step annealing directly from Cu-Y-gel under nitrogen flow was used. X-ray diffraction (XRD) revealed that the film annealed at 800˚C is significantly c-axis oriented, shows only (002) and (004) peaks at 15.6˚ and 31.5˚, respectively. The optical bandgap of 3.7 -3.8 eV is estimated by (αhν) 2 plot which is higher than previous works. In addition, the films with highly c-axis orientation showed photoluminescence (PL) at room temperature with very broad peak at 2.3 eV. The films annealed at different temperature showed different structural properties.

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Section: Resultscontrasting

confidence: 96%

Section: Resultssupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

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Preparation of CuYO2 Thin Films by Sol-Gel Method Using Copper Acetate and Yttrium Acetate as Metal Sources

Ehara¹

2016

MSCE

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“…Hybrid yttrium-copper oxides are important in the field of high- T c superconductors. , Although the clusters of copper oxides and yttrium oxides were intensively studied, the investigation of hybrid yttrium-copper oxides is relatively rare. Yttrium ([Kr]4d 1 5s 2 ), an important rare-earth (RE) metal, makes YCuO 2 possess special properties. − Y 2 O 3 -doped copper matrix composites were prepared through solid–liquid doping, calcination reduction, and spark plasma sintering. The effects of preparing methods on the microstructure and mechanical properties were investigated synchronously .…”

Section: Introductionmentioning

confidence: 99%

Anion Photoelectron Spectroscopy and Quantum Chemical Calculations of Bimetallic Oxide Clusters YCu₂O_n^–/0 (n = 2–5)

Yan

et al. 2022

J. Phys. Chem. A

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The structural and electronic properties of bimetallic oxide clusters, YCu 2 O n − and YCu 2 O n (n = 2−5), are investigated using anion photoelectron spectroscopy and density functional theory calculations. The experimental vertical detachment energies of YCu 2 O 2 − , YCu 2 O 3 − , YCu 2 O 4 − , and YCu 2 O 5 − were measured to be 1.59, 1.76, 3.85, and 3.78 eV, respectively. Vibrationally resolved photoelectron spectra have been obtained for YCu 2 O 2 − , with a spacing of 726 ± 80 cm −1 assigned to the Y− O stretching vibrational mode. It is found that YCu 2 O 2 − and YCu 2 O 2 have C 2v symmetric planar five-membered ring structures. YCu 2 O 3 − and YCu 2 O 3 have C 2v symmetric planar six-membered ring structures. The most stable structure of YCu 2 O 4 − is a quasiplanar structure which can be viewed as one O atom interacting with the Y atom of the YCu 2 O 3 six-membered ring, while the most stable structure of YCu 2 O 4 is a planar seven-membered ring. YCu 2 O 5 − and YCu 2 O 5 have nonplanar structures, which can be viewed as an O 2 unit interacting with the Y atom of the YCu 2 O 3 six-membered ring. In YCu 2 O 3,4,5 −/0 , the Y−O and Cu−O bonds are dominant, while the Y−Cu and Cu−Cu interactions are weak.

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“…Thin films or fibers are produced directly from the solution by techniques such as dip-coating, spray-coating or spin-coating at a lower cost than those based on sophisticated vacuum systems. Recently, delafossite structure films such as CuYO 2 [27] CuAlO 2 [19,28], CuFeO 2 [29] have been successfully prepared via sol-gel method.…”

Section: Introductionmentioning

confidence: 99%

Preparation of delafossite-type CuCrO2 films by sol–gel method

Wang

Zheng

et al. 2011

Journal of Alloys and Compounds

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Preparation of Delafossite-Type CuYO₂ Films by Solution Method

Cited by 17 publications

References 10 publications

Preparation of CuYO<sub>2</sub> Thin Films by Sol-Gel Method Using Copper Acetate and Yttrium Acetate as Metal Sources

Preparation of CuYO<sub>2</sub> Thin Films by Sol-Gel Method Using Copper Acetate and Yttrium Acetate as Metal Sources

Anion Photoelectron Spectroscopy and Quantum Chemical Calculations of Bimetallic Oxide Clusters YCu₂O_n^–/0 (n = 2–5)

Preparation of delafossite-type CuCrO2 films by sol–gel method

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Preparation of Delafossite-Type CuYO2 Films by Solution Method

Cited by 17 publications

References 10 publications

Preparation of CuYO&lt;sub&gt;2&lt;/sub&gt; Thin Films by Sol-Gel Method Using Copper Acetate and Yttrium Acetate as Metal Sources

Preparation of CuYO&lt;sub&gt;2&lt;/sub&gt; Thin Films by Sol-Gel Method Using Copper Acetate and Yttrium Acetate as Metal Sources

Anion Photoelectron Spectroscopy and Quantum Chemical Calculations of Bimetallic Oxide Clusters YCu2On–/0 (n = 2–5)

Preparation of delafossite-type CuCrO2 films by sol–gel method

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Preparation of Delafossite-Type CuYO₂ Films by Solution Method

Preparation of CuYO<sub>2</sub> Thin Films by Sol-Gel Method Using Copper Acetate and Yttrium Acetate as Metal Sources

Preparation of CuYO<sub>2</sub> Thin Films by Sol-Gel Method Using Copper Acetate and Yttrium Acetate as Metal Sources

Anion Photoelectron Spectroscopy and Quantum Chemical Calculations of Bimetallic Oxide Clusters YCu₂O_n^–/0 (n = 2–5)