Properties of fluorine-doped ZnO deposited onto glass by spray pyrolysis

ZnO: Al films were prepared using low cost spray pyrolysis technique. The dependence of the physical properties on the substrate temperature was studied. The best films obtained at 500°C substrate temperature with preferred [002] orientation. The sheet resistance decreases with increased substrate temperature, and values as low as R sh = 207 Ω/cm 2 are reached for substrate temperature of 500°C. The optical transmittance of films increased by increasing the substrate temperature and received to 75% at 500°C.

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“…1g and h) the intensity of (002) diffraction peak decreases in the XRD pattern. A similar behavior is observed by [21].…”

Section: Methodssupporting

confidence: 86%

Influence of substrate temperature on the structure of ZnO:Al thin films

Rozati¹,

Akeste

2008

Cryst. Res. Technol.

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“…ZnO is a wide band gap n-type semiconductor, E g =3.3 eV at room temperature, with hexagonal wurtzite structure, and a large exciton binding energy of 60 meV [1][2][3]. In order to improve the physical properties of ZnO, many elements such as aluminum (Al), tin (Sn), indium (In) and fluorine (F) and many others have been used as dopants [1][2][3][4][5]. The synthesis of nanostructures has been of growing interest owing to their promising application in nanoscale optoelectronic devices, like the next generation solar cells [6][7].…”

Section: Introductionmentioning

confidence: 99%

Spin coated (M_x, Zn_1-xO), M= Sn, Al nanofibers investigation

Benhaliliba

Benouis

Tiburcio‐Silver³

et al. 2013

EPJ Web of Conferences

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Abstract.(M x , Zn 1-x O), M= Sn, Al nanofibers properties were investigated. Pure and M-doped zinc oxide films were fabricated onto a glass substrate by a facile and low cost spin coating route. X-rays analysis reveals that films crystallize with a wurtzite structure according to (002) orientation. The transmittance in the visible range was as high as 88 % at 550 nm. The doping increased slightly the transmittance, the as-grown films were high transparent in VIS and IR ranges. The optical band gap was a little bit changed by doping. AFM 3D-views revealed that grains were nanofibers with the size of 18.22, 18.23 and 44.27 nm respectively for pure, Al and Sn-doped ZnO films.

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“…25 Due to the high activation energy of donor F O ͑0.762 eV͒, the increase in carrier concentration and mobility of ZnO:F could not attribute to the electrons from donor F O . 26 Both F O and F i in ZnO could cause the noncentrosymmetric charge density distribution which may lead to the enhancement of the linear electro-optics effect. Fluorine ions at grain boundaries could cause surface passivation effect by saturating these dangling bonds and thus increase carrier concentration and mobility.…”

mentioning

confidence: 99%