Free-carrier plasma resonance effects and electron transport in reactively sputtered degenerate ZnO:Al films

Brehme, S.; Fenske, F.; Fuhs, W.; Nebauer, E.; Poschenrieder, M.; Selle, B.; Sieber, I.

doi:10.1016/s0040-6090(98)01490-4

Cited by 99 publications

(46 citation statements)

References 16 publications

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“…From figure 1,for all examples, two main peaks,corresponding to the (002)and(103)reflections are observed.The (002)diffraction peaks are observed at a 2θvalue of34.23°、34.29、34.28° 、34.26° respectively , which agree with the value reported in the literature for films grown on silicon ,glass and sapphire substrates [ 1,2 ].The c-axis length of the polycrystal tends to increase for all films,as the (002)peak angle was smaller than that of the bulk crystal(34.45°). Furthermore for all examples additionally to the (002) peak the (103)orientation is evident.The similar results are also reported by other authors [3,4].The XRD measurements firstly reveal that these ZAO thin films are polycrystalline and retain the hexagonal wurtzite structure,having lattice parameters corresponding to that of bulk ZnO.Secondly,the XRD patterns suggest that the optimal films with improved crystallinity can be obtained at the O 2 /Ar flow ration range from 2:38 to 4.2:35.8 .Particularly the (103) peak decreases evidently and the(002)peak does not change significantly,which means that at the lower oxygen content the O 2 /Ar flow ration does not mainly influence the degree of crystallinity but the preferred orientation.…”

Section: Structure and Morphological Analysissupporting

confidence: 87%

Study of transparent conducting ZnO:Al films deposited on organic substrate by reactive magnetron sputtering

Wang

2009

J. Phys.: Conf. Ser.

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Abstract.A Zn-Al metallic target (Al 2 wt.%)has been used to prepare conductive and transparent aluminium-doped Zinc oxide(ZnO:Al) films on PI substrate by direct current reactive magnetron sputtering.The structure,crystallinity,optical properties,electrical properties and adhesion were investigated using a range of techniques,including AFM 、 XRD 、 spectrophotometry、four-point probe and adhesion tester.The optimal films were prepared with a substrate temperature of 150℃，O 2 /Ar ration of 2:38 and sputtering power of 80W.The infrared emission properties of films and the feasibility for military application were also discussed in this paper. All the results to date demonstrate that magnetron sputtering is a costeffective and easy to fabricating technique. IntroductionNowdays there is a great interest in replacing indium tin oxide (ITO) with aluminium -doping ZnO(ZAO),because of this oxide low cost,abundant raw materials,non-toxicity,relatively low deposition temperature and stability in hydrogen plasm.Extensive research work has being done on ZAO films depositied on rigid substrates.Recently preparing ZAO films on organic substrate has generated a renewed interest in it's potential use. Transparent conducting films deposited on polymer substrates have many merits compared with those deposited on glass and silicon substrate;they are lightweight,flexible, robust,of small volume and easy to carry,which are desired properties for a variety of applications such as flat panel display, heat-reflecting coating for energy saving use,low emissivity coating for stealth use etc.In this work,ZAO films were deposited on polyimides being with good heat resistance from Zn-Al metallic target.Detailed information about optical properties,electrical properties as well as structure and morphology were presented.

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Section: Structure and Morphological Analysissupporting

confidence: 87%

Study of transparent conducting ZnO:Al films deposited on organic substrate by reactive magnetron sputtering

Wang

2009

J. Phys.: Conf. Ser.

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“…Furthermore, our results are also greater than the calculated phonon-scattering-limited value of ∼400 cm 2 /V·s (27). The optical mobility data obtained with the present method should be a good measure of intrinsic scattering processes because of the effective exclusion of grainboundary/impurity scattering (28).…”

Section: Significancementioning

confidence: 48%

Giant magneto-optical Raman effect in a layered transition metal compound

Zhang

Fan

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

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We report a dramatic change in the intensity of a Raman mode with applied magnetic field, displaying a gigantic magnetooptical effect. Using the nonmagnetic layered material MoS 2 as a prototype system, we demonstrate that the application of a magnetic field perpendicular to the layers produces a dramatic change in intensity for the out-of-plane vibrations of S atoms, but no change for the in-plane breathing mode. The distinct intensity variation between these two modes results from the effect of field-induced broken symmetry on Raman scattering cross-section. A quantitative analysis on the field-dependent integrated Raman intensity provides a unique method to precisely determine optical mobility. Our analysis is symmetry-based and material-independent, and thus the observations should be general and inspire a new branch of inelastic light scattering and magneto-optical applications.Raman | layered | magneto-optical | broken symmetry | phonon

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“…This trend is consistent with published findings that the electron affinity of AZO films becomes deeper as the oxygen content is increased during deposition. 4 We confirmed with SEM that the CQD film was discontinuous (Figure 2), thus ensuring that the only lateral conduction path was via the channel. We further confirmed this by spin-coating CQDs under identical conditions onto prepatterned substrates, without the AZO present.…”

mentioning

confidence: 53%