Modification of electrical and optical properties of CuO thin films by Ni doping

Baturay, Şilan; Tombak, Ahmet; Kaya, Derya; Ocak, Yusuf Selim; Tokus, M.; Aydemir, Murat; Kılıçoğlu, Tahsin

doi:10.1007/s10971-015-3953-4

Cited by 103 publications

(34 citation statements)

References 35 publications

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“…It can be said that all thin film surface is also composed of densely packed nanoparticles and the coverage rate of the nanoparticles comparatively increased with Sb. A similar change in the SEM images was reported in our previous work [40].…”

Section: Surface Morphology Studiessupporting

confidence: 89%

Sb Katkılı CuO Filmlerinin Yapısal ve Optik Özellikleri

Baturay¹

2020

Academic Platform Journal of Engineering and Science

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Öz (111) tercihli yönelimli Sb katkılı CuO ince film, çeşitli ağırlık oranlarında (ağırlıkça % 0, 1, 2 ve 3 Sb), soda kireç cam alttaşı (SLG) üzerine dönel kaplama tekniği kullanılarak büyütüldü. Farklı Sb katkısının CuO filmlerin yapısal, morfolojik ve optik özellikleri üzerindeki etkisi, X-ışını difraksiyon (XRD) ünitesi, taramalı elektron mikroskobu (SEM) ve UV-vis spektrofotometresi kullanılarak kapsamlı bir şekilde incelenmiştir. Filmlerin X ışını kırınım spektroskopi çalışmaları, ince filmlerin tercihli yönelim boyunca polikristal doğaya sahip olduklarını göstermektedir. Tüm CuO ince film morfolojisi yüzeyde kusur olmaksızın homojen doğaya sahip olduğunu göstermektedir. Elde edilen CuO filmlerin geçirgenliği, Sb içeriğindeki artışla değişmiştir. Ultraviyole görünür bölge spektrofotometre ölçümleri, elde edilen filmlerin enerji bant aralığında 1.70'den 2.37 eV'ye kadar radikal bir şekilde artış olduğunu göstermektedir. Sb katkılı CuO ince film optik özelliklerinin önemli ölçüde değiştiği söylenebilir.

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Section: Surface Morphology Studiessupporting

confidence: 89%

Sb Katkılı CuO Filmlerinin Yapısal ve Optik Özellikleri

Baturay¹

2020

Academic Platform Journal of Engineering and Science

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“…In order to estimate the bandgap of the CuO thin films, first, the transmittance (T) and reflectance (R) experimental data were converted to the absorption coefficient (α) via the following equation: (4) where t is thickness 3,26 . The optical bandgap (E g ) and absorption coefficient are directly related via the Tauc relation: (5) where hυ is the photon energy, A is an energy independent constant, and n is ½ for direct allowed transition. Therefore, the bandgap can be estimated by plotting (αhν) 2 versus hν and extrapolating the linear part of the Tauc plot to (αhν)…”

Section: Electrical Propertiesmentioning

confidence: 99%

“…CuO with its monoclinic structure naturally exhibits p-type conductivity and the band gap values of 1.3-2.1 eV has been reported in literatures 3 . The possibility of depositing CuO with almost all conventional methods, such as sputtering 4 , sol-gel 5 , chemical vapor deposition 6 , thermal deposition 7 , can provide the groundwork for the deposition of CuO films with a wide variety of characteristics. However, the main drawback of the most sophisticated methods is the fact that they require highly expensive devices and processes.…”

Section: Introductionmentioning

confidence: 99%

Spray Deposited Nanostructured CuO Thin Films: Influence of Substrate Temperature and Annealing Process

Asl

Rozati

2018

Mat. Res.

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In this study, CuO thin films were deposited on glass substrates at a wide range of temperatures from 450ºC to 550ºC with steps of 25ºC by chemical spray pyrolysis technique. Aiming to investigate the effect of annealing process, one of the resulting films was annealed at 450ºC for 3 hours under ambient air. Based on X-ray diffraction, all the resulting films are monoclinic with two prominent peaks at ~36º and ~39º. The crystallite size of the CuO film deposited at 450ºC was found to be the largest in comparison with the others. As the substrate temperature increased, a gradual change was observed for the CuO thin film surface morphology and in the case of annealed film, the grains and their boundaries became indistinguishable. The resistivity of the films was reduced by virtue of increasing the substrate temperature and also, both the mobility and carrier concentration of the annealed film were improved drastically after annealing. As expected, the CuO thin films absorption was considerable in the visible region and gradually declined after 800nm. The estimated band gap value of the CuO film deposited at 450ºC were fairly close to the optimum band gap for solar applications.

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“…The microstructural and surface morphological properties of CuO films are determined by their preparation technique. CuO films have been grown using various deposition techniques such as thermal oxidation [20], electrodeposition [21,22], pulsed-laser deposition [23], plasma evaporation [24], thermal evaporation [25], reactive sputtering [26], electron-beam evaporation [27], molecular-beam epitaxy [28], spray pyrolysis [29,30], spin coating [31], successive ionic layer adsorption and reaction (SILAR) [32] and chemical vapor deposition [33,34]. Among these film deposition processes, radio-frequency (RF) magnetron sputtering is one of the most pre-eminent industrial practical techniques to achieve high-quality and uniform thickness films with the required chemical composition [35].…”

Section: Introductionmentioning

confidence: 99%

“…Note that the number of works reporting the supercapacitive properties of CuO films is very limited. We only identified nine articles, which are listed in Table 1 with the brief description of the synthesis procedures [31,[43][44][45][46][47][48][49][50]. All works show multi-step processes (at least three steps) used for the synthesis of CuO films, which are rather complex and costly methods compared with the one-step magnetron sputtering technique, which is also scalable for low-cost industrial production without the use of chemicals in aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

RF Sputter-Deposited Nanostructured CuO Films for Micro-Supercapacitors

et al. 2021

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Copper oxide is considered as an alternative electrode material for supercapacitors due to its low cost, chemical stability and high theoretical specific capacitance. In the present work, nanostructured copper oxide (CuO) films are prepared by radio-frequency (RF) magnetron sputtering, and the influence of the substrate temperature on the microstructure and supercapacitive properties was studied. The copper oxide films prepared at 350 °C exhibit a predominant (1¯11) orientation corresponding to the monoclinic Cu(II)O phase with a crystallite size of 24 nm. The surface of the film consists of uniformly distributed oval-like grains providing a high surface roughness of 45 nm. The films exhibit an optical bandgap of 1.68 ± 0.01 eV and an electrical conductivity of 0.4 S cm−1 at room temperature. The as-prepared CuO films deliver a discharge specific capacitance of 387 mF cm−2 (375 F g−1) at a current density of 1 mA cm−2 with excellent cyclic capacitance retention of 95% (367 mF cm−2) even after 1000 cycles. Hence, these films are potential electrodes for micro-supercapacitors.

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Modification of electrical and optical properties of CuO thin films by Ni doping

Cited by 103 publications

References 35 publications

Sb Katkılı CuO Filmlerinin Yapısal ve Optik Özellikleri

Sb Katkılı CuO Filmlerinin Yapısal ve Optik Özellikleri

Spray Deposited Nanostructured CuO Thin Films: Influence of Substrate Temperature and Annealing Process

RF Sputter-Deposited Nanostructured CuO Films for Micro-Supercapacitors

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