Effect of growth temperature on structural and electronic properties of ZnO thin films

Tahir, Dahlang; Jae, Kang Hee

doi:10.1063/1.4973085

Cited by 23 publications

(5 citation statements)

References 13 publications

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“…Regarding the inorganic thin film, although, in the powder form, ZnO shows a high crystallinity degree ( Figure 1A), as a MAPLE-deposited thin layer, ZnO exhibits an amorphous nature, most probably its thickness (70 nm) being responsible for this behavior. A similar result was obtained when this metal oxide was deposited as a thin film at room temperature, without annealing treatments [31].…”

Section: Resultssupporting

confidence: 80%

“…nature, most probably its thickness (70 nm) being responsible for this behavior. A similar result was obtained when this metal oxide was deposited as a thin film at room temperature, without annealing treatments [31]. MAPLE-deposited layers were investigated from morphological point of view, their FESEM images at two magnifications (Figures 4 and 5) and AFM images ( Figure 6) evidencing the globular morphology specific to films obtained by MAPLE process [19,20].…”

Section: Resultssupporting

confidence: 74%

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Thin Films Based on Cobalt Phthalocyanine:C60 Fullerene:ZnO Hybrid Nanocomposite Obtained by Laser Evaporation

et al. 2020

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Matrix-assisted pulsed laser evaporation (MAPLE) was used to deposit hybrid nanocomposite thin films based on cobalt phthalocyanine (CoPc), C60 fullerene and ZnO nanoparticles. The inorganic nanoparticles, with a size of about 20 nm, having the structural and optical properties characteristic of ZnO, were chemically synthesized by a simple precipitation method. Furthermore, ZnO nanoparticles were dispersed in a dimethyl sulfoxide solution in which CoPc and C60 had been dissolved, ready for the freezing MAPLE target. The effect of the concentration of ZnO nanoparticles on the structural, morphological, optical and electrical properties of the CoPc:C60:ZnO hybrid nanocomposite layers deposited by MAPLE was evaluated. The infrared spectra of the hybrid nanocomposite films confirm that the CoPc and C60 preserve their chemical structure during the laser deposition process. The CoPc optical signature is recognized in the ultraviolet–visible (UV–Vis) spectra of the obtained layers, these being dominated by the absorption bands associated to this organic compound while the ZnO optical fingerprint is identified in the photoluminescence spectra of the prepared layers, these disclosing the emission bands linked to this inorganic semiconductor. The hybrid nanocomposite layers exhibit globular morphology, which is typical for the thin films deposited by MAPLE. Current-voltage (J-V) characteristics of the structures developed on CoPc:C60:ZnO layers reveal that the addition of an appropriate amount of ZnO nanoparticles in the CoPc:C60 mixture leads to a more efficient charge transfer between the organic and inorganic components. Due to their photovoltaic effect, structures featuring such hybrid nanocomposite thin films deposited by MAPLE can have potential applications in the field of photovoltaic devices.

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Section: Resultssupporting

confidence: 80%

Section: Resultssupporting

confidence: 74%

Thin Films Based on Cobalt Phthalocyanine:C60 Fullerene:ZnO Hybrid Nanocomposite Obtained by Laser Evaporation

et al. 2020

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“…Tanecik boyutunun artması dolayısıyla dislokasyon yoğunluğunun azalmasıyla beraber, yarıiletken filmin kristal kalitesi artacaktır [29][30][31]. Buna göre, ZEu-02 filminin, diğer filmlere göre daha iyi kristallenen film olduğu söylenebilir (Tablo 1).…”

Section: Bulgular Ve Tartışmaunclassified

ZnO:Eu Filmlerinin Mikroyapısal ve Optik Özellikleri

Büyük¹,

Ilıcan²

2018

Karadeniz Fen Bilimleri Dergisi

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Evropiyum (Eu) katkılı çinko oksit (ZnO) filmleri, ucuz ve basit bir metot olan sol jel metodu ile elde edilen çözeltiler kullanılarak p-tipi silisyum (p-Si) alttaşlar üzerine spin kaplama tekniği ile büyütülmüştür. Elde edilen ZnO filminin yapısal, morfolojik ve optik özellikleri üzerine Eu katkısının etkisi, sırasıyla X-ışını kırınım cihazı, taramalı elektron mikroskobu ve uv-vis spektrofotometresi kullanılarak araştırılmıştır. Filmlerin XRD spektrumlarından, bütün filmlerin hekzagonal wurtzite zinkit (ZnO) yapıya ait olduğu ve (002) tercihli yönelime sahip olduğu belirlenmiştir. ZnO:Eu filmlerinin çekilen SEM fotoğrafları ImageJ programı ile analiz edilmiştir. Bütün filmlerin yüzeylerinin homojen ve düzgün yapıya sahip olduğu ve nanoparçacıklardan oluştuğu; yapılan Eu katkısının ZnO yüzey morfolojisinde önemli bir değişiklik olmadığı gözlenmiştir. ZnO:Eu filmlerinin diffüz yansıma spektrumları, entegre küre aparatlı UV-vis spektrofotometre yardımıyla ölçülmüştür. Bu spektrumlar kullanılarak filmlerin optik bant aralık değerleri, hem diferansiyel yansıma spektrumları hem de Kubelka-Munk fonksiyonu kullanılarak belirlenmiştir.

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“…As per the calculation, it was found that the grain size of the samples increased with the pyrolysis temperature. Tahir et al [46] observed high-intensity peaks of XRD with the increase in growth temperature. They found the polycrystalline nature of ZnO with their preferred orientation of (002) plane with the highest peak for the films deposited at 500 °C.…”

Section: Structural Analysismentioning

confidence: 99%

Understanding the interplay of solution and process parameters on the physico-chemical properties of ZnO nanofibers synthesized by sol-gel electrospinning

Prabhu,

Rajendra,

Anandhan

et al. 2023

Mater. Res. Express

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Aging populations and the increase in chronic diseases worldwide demand efficient healthcare tools for simple, rapid, and accurate diagnosis and monitoring the human health. In this context, gas sensors are used to analyze the type of gas in the breath to diagnose chronic diseases. Metal oxide and ceramic nanofibers (NFs) produced by the electrospinning (ES) method have been investigated for potential use as gas sensors in engineering and medical sectors. The material and process parameters are the main influencing factors on the functional performance of electrospun metal oxide NFs. Zinc oxide (ZnO) based NFs are used in various gas sensors due to the wide band gap (3.37eV), large exciton binding energy, and high mobility of charge carriers of ZnO. In this research, we made an attempt to study the effect of poly(vinyl alcohol) (PVA) and zinc acetate dihydrate (ZnAc2) concentrations and feed rate, voltage, spinneret tip-to-collector distance (TCD), and pyrolysis temperature on the physical properties of ZnO NFs. An average fiber diameter of 119 nm was obtained after pyrolysis at 600° C of electrospun fiber produced from an aqueous PVA solution of concentration 15 w/v% with 7.5 w% ZnAc2 based on the weight of PVA. The grain size, transmittance, structural defects and band gap energy of NFs were found to increase as a function of the pyrolysis temperature, which could be beneficial for the functional applications of these NFs.

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Effect of growth temperature on structural and electronic properties of ZnO thin films

Cited by 23 publications

References 13 publications

Thin Films Based on Cobalt Phthalocyanine:C60 Fullerene:ZnO Hybrid Nanocomposite Obtained by Laser Evaporation

Thin Films Based on Cobalt Phthalocyanine:C60 Fullerene:ZnO Hybrid Nanocomposite Obtained by Laser Evaporation

ZnO:Eu Filmlerinin Mikroyapısal ve Optik Özellikleri

Understanding the interplay of solution and process parameters on the physico-chemical properties of ZnO nanofibers synthesized by sol-gel electrospinning

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