Structural, opto-thermal and electrical properties of ZnO:Mo sprayed thin films

Boukhachem, A.; Ouni, B.; Karyaoui, M.; Madani, A.; Chtourou, R.; Amlouk, M.

doi:10.1016/j.mssp.2012.02.014

Cited by 106 publications

(36 citation statements)

References 70 publications

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“…But at the same substrate temperature of 673 K, the reactivity between Mo and ZnO in the vapour phase is improved and overcomes the multiple transitions in case of films doped with 1.5 and 2 at.% Mo to ZnO. The results were in good agreement with reported values [2,26].…”

Section: Optical Propertiessupporting

confidence: 86%

Preparation and Characterization of R.F. Magnetron Sputtered Mo:ZnO Thin Films

Srinivasarao

Madhuri

et al. 2013

Indian Journal of Materials Science

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The ZnO and Mo:ZnO thin films were deposited by radio frequency magnetron sputtering on quartz and intrinsic silicon (100) substrates at a fixed combined partial pressure 1×10 −2 mbar of Ar + O 2 and substrate temperatures of 473 K and 673 K. The effect of Molybdenum doping on ZnO thin films with different Molybdenum concentrations (1-2 atomic percent) was studied with the help of structural and microstructural characterization techniques. The films deposited at a substrate temperature of 473 K exhibited strong -axis orientation with predominant (002) peak. At 673 K, along with (002) orientation, other orientations (100), (101), (220), and (103) were also observed. Among these, the (220) peak indicates the cubic phase of ZnO. With increasing Molybdenum concentration, the cubic phase of ZnO disappeared, and the (002) orientation became strong and intense. The composition analysis reveals that the undoped ZnO films deposited at 473 K have oxygen deficiency, and the ratio of Zn/O is improved with increasing Mo atomic percent in ZnO. The surface morphological features reveal that the undoped ZnO films were found to be uniform and have grain size of around 30 nm. The optical energy gap of the undoped ZnO films is 3.05 eV and increases with increasing Mo concentration. The thickness of the films is around 456 nm.

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Section: Optical Propertiessupporting

confidence: 86%

Preparation and Characterization of R.F. Magnetron Sputtered Mo:ZnO Thin Films

Srinivasarao

Madhuri

et al. 2013

Indian Journal of Materials Science

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“…6. Moreover, n = 1/2 is a better fit, which shows the direct transition of the electron in the ZnO and Mo:ZnO films [33][34][35], and the resultant energy gap is 3.11 eV.…”

Section: Optical Propertiesmentioning

confidence: 93%

Physical investigations on transparent conducting Mo:ZnO thin films

Srinivasarao

Mohanbabu²,

Mukhopadhyay

2018

Adv Compos Hybrid Mater

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Molybdenum (Mo)-doped zinc oxide (ZnO) thin films were deposited by radio frequency (r.f.) magnetron sputtering on quartz and Si (100) substrates at two different substrate temperatures (473 and 673 K) and at a fixed combined partial pressure 5 Pa of Argon and O 2 . The atomic percentage (at.%) of (Mo) in ZnO was increased from 1 to 2 at.%. The results of X-ray diffraction revealed that the ZnO films deposited at 5 Pa at a substrate temperature of 473 K were highly c-axis oriented with a predominant (002) crystallographic orientation. The intensity of (002) decreased with an increase in the atomic percentage of Mo. Moreover, a growth in the (100), (101), (220), and (103) orientations was observed. The energy-dispersive spectrum (EDS) of the Mo:ZnO films deposited at 5 Pa and 473 K was substoichiometric, whereas the films deposited at 673 K were nearly stoichiometric. The surface morphology of the ZnO films is porous when deposited at 473 K. The optical energy gap of the ZnO films deposited at 473 K increased from 3.11 to 3.64 eV with an increase in the atomic percentage of Mo. The electrical resistivity of the ZnO films decreased from 1.7 × 10 −4 to 6.7 × 10 −5 Ωm with an increase in the substrate temperature and atomic percentage of Mo. The thickness of the films measured by spectroscopic ellipsometry is 440 nm.

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“…The lattice parameters ''a'' and ''c'' are calculated via (002) and (100) orientation using the following relation [24][25]:…”

Section: Structural Propertiesmentioning

confidence: 99%

“…The grain size D for different samples is estimated from the (002) diffraction peak using Debye-Scherer formula [25][26][27].…”

Section: Structural Propertiesmentioning

confidence: 99%

Li-doped ZnO Sol-Gel Thin Films: Correlation between Structural Morphological and Optical Properties

Hb¹,

Wr²,

Zaghouani³

et al. 2018

J Textile Sci Eng

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Transparent Conducting Oxides (TCOs) have important device applications used in solar cells as transparent electrodes. In particular, ZnO material has been investigated for many years due to its excellent physical properties and potential applications in transparent conductive contacts when it is doped by several types of doping. If n-type doping is easily achievable in ZnO, the realization of stable and reproducible p-type ZnO is still difficult. The group I (Li, Na) atoms could be potential candidates to result in p-type ZnO. The choice of lithium as a dopant is motivated firstly by its abundance in nature, its low cost compared to other alkali metals and its wide application. Undoped and Lithium-doped zinc oxide thin films (ZnO:Li) at different percentages (5, 15 and 25%) were prepared on glass substrates, using the sol-gel spin-coating method, and the influence of the Li concentration on the structural, morphological and optical properties of the ZnO thin films was investigated. X-ray diffraction (XRD) analysis shows that the un-doped and 5 at % Li-doped films have a hexagonal wurtzite structure and are preferentially oriented along the c-axis from the substrate. SEM analysis shows a compact surface with mainly hexagonal grains. Optical transmittance measurements show that all samples have average 88% transparency in the visible light, with a sharp fall of the absorption at a wavelength (~376 nm) close to the ZnO band gap. The results suggest that the optical properties of the ZnO:Li films can be further improved for solar cell applications.

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Structural, opto-thermal and electrical properties of ZnO:Mo sprayed thin films

Cited by 106 publications

References 70 publications

Preparation and Characterization of R.F. Magnetron Sputtered Mo:ZnO Thin Films

Preparation and Characterization of R.F. Magnetron Sputtered Mo:ZnO Thin Films

Physical investigations on transparent conducting Mo:ZnO thin films

Li-doped ZnO Sol-Gel Thin Films: Correlation between Structural Morphological and Optical Properties

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