Effect of substrate temperature on the growth and photoluminescence properties of vertically aligned ZnO nanostructures

Li, Chun; Fang, Guojia; Fu, Qiang; Su, Fuhai; Li, Guohua; Wu, Xinhui; Zhao, Xingzhong

doi:10.1016/j.jcrysgro.2006.03.061

Cited by 152 publications

(61 citation statements)

References 28 publications

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“…with the SEM data in Fig. 2 [8,9,18]. SEM data from PLD-grown ZnO nanorods at 30º tilt view is shown in Fig.…”

Section: Surface Morphologiesmentioning

confidence: 71%

“…Many deposition techniques including vapour phase transport (VPT) [5][6][7][8][9], metal-organic chemical vapour deposition (MOCVD) [1,10], hydrothermal deposition [11], pulsed laser deposition (PLD) [12], electrochemical deposition [13], and chemical bath deposition (CBD) [14] have been used to grow vertically aligned ZnO nanorods with good crystalline quality and optical properties.…”

Section: Introductionmentioning

confidence: 99%

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Origin of the 3.331 eV emission in ZnO nanorods: Comparison of vapour phase transport and pulsed laser deposition grown nanorods

Inguva

Gray

McGlynn

et al. 2016

Journal of Luminescence

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*Corresponding authors: saikumar.inguva2@mail.dcu.ie and enda.mcglynn@dcu.ie. KEYWORDSZnO seed layers, vertically aligned ZnO nanorods, vapour phase transport, pulsed laser deposition, 3.331 eV emission. 2 ABSTRACTIn this work, we report the growth of vertically aligned ZnO nanorods with excellent optical quality by both catalyst free vapor phase transport (VPT) and catalyst free pulsed laser deposition (PLD). We compare the near band edge emission of such deposits, with a focus on the identification of the origin of the 3.331 eV emission feature. X-ray diffraction (XRD), scanning electron microscopy (SEM) and low-temperature (13 K) photoluminescence (PL) were used to characterise these nanorod deposits. XRD and SEM data reveal that both techniques lead to highly textured ZnO nanorod arrays with uniform c-axis orientation normal to the substrate surface. The VPT-grown nanorods are well separated and show smooth, facetted surfaces whereas the PLD-grown nanorods are more closely packed and display comparatively rougher surfaces. The optical quality of the samples obtained by both growth methods was very good and low-temperature PL spectra were dominated in both cases by a strong I 6 bound exciton (BX) emission (3.36 eV), and also showed emission from the surface exciton and the free exciton. A comparatively weak visible emission was also observed in samples deposited by both techniques.The main difference between the PLD-and VPT-grown nanorod samples is the presence of the 3.331 eV emission in the former, and its complete absence in the latter (as well as in continuous PLD-grown seed layers) which is discussed in light of the differing surface morphologies mentioned above and which provides strong support for our previous assignment of the origin of this defect to structural defects in the inhomogeneous sub-surface region close to the rough nanorod surface.3

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“…with the SEM data in Fig. 2 [8,9,18]. SEM data from PLD-grown ZnO nanorods at 30º tilt view is shown in Fig.…”

Section: Surface Morphologiesmentioning

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Origin of the 3.331 eV emission in ZnO nanorods: Comparison of vapour phase transport and pulsed laser deposition grown nanorods

Inguva

Gray

McGlynn

et al. 2016

Journal of Luminescence

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“…1(b), it is clearly seen that there are two typical diameters among those NWs. The majority of those NWs are individual wires, which have diameters about 120~150 nm, and the other NWs with diameters are in the range of 200~250 nm which can be due to the combination of two thinner NWs [19,20]. However, those NWs have a highly uniform diameter along their lengths, as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

High-quality ZnO nanowire arrays directly synthesized from Zn vapor deposition without catalyst

Khai¹,

Maneeratanasarn²,

Choi³

et al. 2011

Journal of the Korean Crystal Growth and Crystal Technology

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Vertically well-aligned ZnO nanowire (NW) arrays were synthesized directly on GaN/sapphire and Si substrate from Zn vapor deposition without catalysts. Experimental results showed that the number density, diameter, crystallinity and degree of the alignment of ZnO NWs depended strongly on both the substrate position and kind of the substrates used for the growth. The photoluminescence (PL) characteristics of the grown ZnO NW arrays exhibit a strong and sharp ultraviolet (UV) emission at 379 nm and a broad weak emission in the visible range, indicating that the obtained ZnO NWs have a high crystal quality with excellent optical properties. The as-grown ZnO NWs were characterized by using scanning electron microscopy (SEM), high resolution transmission electronic microscopy (HR-TEM), and X-ray diffraction (XRD).

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“…By comparing the e ects of di erent conditions, controlling the growth procedure in order to produce desired nanostructures is possible [1,2]. In particular, in thermal evaporation method for producing ZnO nanostructures, conditions such as di erent substrates [3][4][5], temperatures of substrate [6], O 2 partial pressure during deposition [7], growth temperatures [8,9], temperatures for annealing Zn thin lms to produce ZnO thin lms [10], and high magnetic eld during oxidizing Zn thin lms [11] are e ective on the growth mechanism of ZnO nanostructures. Producing ZnO thin lms in the presence of static electric and magnetic elds in vacuum by thermal evaporation is an innovative method [12,13].…”

Section: Introductionmentioning

confidence: 99%

Unsteady double-diffusive natural convection with Soret and Dufour effects inside a two-sided lid-driven skewed enclosure in the presence of applied magnetic field

Ghaffarpasand

2017

Scientia Iranica

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Abstract. ZnO nanostructures were produced with an innovative and simple vacuum thermal evaporation method with evaporating Zn in the presence of strong static electric and magnetic elds perpendicular to each other. These evaporated Zn thin lms were oxidized on the furnace to obtain ZnO. In order to investigate the e ects of magnetic eld on ZnO nanostructures in this method, two di erent setups with di erent magnetic eld strengths were assembled. Morphology and structure of ZnO thin lms in both setups were investigated by micrographs prepared by Field Emission Scanning Electron Microscopy (FESEM) and X-Ray Di raction (XRD) analysis. Results showed that the grown nano rods of ZnO in both setups were blade-like and match-like. Increase in magnetic eld changed the dominant type of nano rods from blade-like in weaker magnetic eld to match-like in stronger magnetic eld. Also, increasing magnetic eld strength caused di erent crystalline orientation in ZnO nanostructures. The results suggested that morphology and structure of ZnO thin lms were a ected by applying magnetic elds with di erent strengths during deposition of Zn in this innovative method.

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Effect of substrate temperature on the growth and photoluminescence properties of vertically aligned ZnO nanostructures

Cited by 152 publications

References 28 publications

Origin of the 3.331 eV emission in ZnO nanorods: Comparison of vapour phase transport and pulsed laser deposition grown nanorods

Origin of the 3.331 eV emission in ZnO nanorods: Comparison of vapour phase transport and pulsed laser deposition grown nanorods

High-quality ZnO nanowire arrays directly synthesized from Zn vapor deposition without catalyst

Unsteady double-diffusive natural convection with Soret and Dufour effects inside a two-sided lid-driven skewed enclosure in the presence of applied magnetic field

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