Investigations into the Impact of the Template Layer on ZnO Nanowire Arrays Made Using Low Temperature Wet Chemical Growth

Erdélyi, R.; Nagata, T.; Rogers, David J.; Téherani, F. Hosseini; Horváth, Zsolt Endre; Lábadi, Z.; Baji, Zsófia; Wakayama, Yutaka; Volk, János

doi:10.1021/cg2002755

Cited by 44 publications

(48 citation statements)

References 34 publications

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“…It can therefore be concluded that the alignment and crystal orientation of the ZnO NRs is determined by the local crystal quality of the seed layer. This finding is in good agreement with the quantitative XRD results of Erdélyi et al [29].…”

Section: The Effect Of Seed Layersupporting

confidence: 93%

Morphology and crystallinity control of wet chemically grown ZnO nanorods

Volk¹,

Erdélyi²

2014

Turk J Phys

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Abstract:The controlled growth of ZnO nanorods on technologically relevant substrates is essential for their practical integration into next generation optoelectronic and piezoelectric devices. In this report, highly ordered and uniform vertical ZnO nanorod arrays were synthesized using a facile, low temperature selective area wet chemical growth process.The nanorods were grown through nucleation windows that were patterned in a PMMA mask using electron beam lithography. At first, the technique was demonstrated on 'ideal' ZnO single crystal substrates, where the geometrical parameters of the highly uniform and crystallographically coherent nanorods were dictated by the nucleation pattern, the polarity of the substrate, and the growth conditions. The obtained geometry was then compared to 4 further arrays corresponding to different ZnO seed layers deposited on Si and sapphire substrates. Scanning electron microscopy showed that the crystal orientation and the alignment of the nanorods were determined by the underlying seed layer.The piezoresponse force microscopy revealed that the d33 piezoelectric tensor component of the wet chemically grown nanorods was comparable (6-12 pm/V) to that of the highest value measured on ZnO single crystal (12.4 pm/V).The presented nanorod arrays have several potential applications, from nanorod based light emitting devices to CMOS compatible piezoelectric nanoforce sensors.

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Section: The Effect Of Seed Layersupporting

confidence: 93%

Morphology and crystallinity control of wet chemically grown ZnO nanorods

Volk¹,

Erdélyi²

2014

Turk J Phys

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“…A ZnO seed layer template is required, which strongly affects the geometry and orientation of the nanorods [21]. The seed layers have been prepared by sol-gel [22], pulsed laser deposition [20], or sputtering [23]. It can reduce the energy of nucleation.…”

Section: Resultsmentioning

confidence: 99%

“…Finally, we synthesized the ZnO nanorods by floating the substrate on the nutrient solution surface, which was composed of a 15 mM solution of 1:1 ratio zinc nitrate hexahydrate (Zn(NO 3 ) 2 Á 6H 2 O) and hexamethylenetramine ((CH 2 ) 6 N 4 ) at 90 1C for 40 min. The specimens were mounted upside-down on beakers (200 ml) to prevent any precipitate that formed in the nutrient solution from falling onto the substrates, which would have inhibited the growth of the nanorods [20]. The samples were then rinsed with DI water and ethanol alternately for several times to remove any residual organics, and then dried by nitrogen gas.…”

Section: Methodsmentioning

confidence: 99%

Conductive white back reflector and scatter based on ZnO nanostructure arrays for harvesting solar energy

Jia¹,

Zhang²,

Liu³

et al. 2012

Nano Energy

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“…The surface was then dry etched with oxygen plasma gas to remove all residual PMMA resist. The ZnO NRs were grown in a sealed glass container filled with an aqueous solution of zinc nitrate hexahydrate (Zn(NO 3 ) 2 Á6H 2 O) and hexamethylenetetramine (C 6 H 12 N 4 ) with an equimolar concentration of 0.012M at 85 C for 6 h. 27,28 Finally, the PMMA resist was removed in acetone and ethanol, and the NRs were immediately rinsed with deionized water.…”

Section: Methodsmentioning

confidence: 99%

Improving the performance of inorganic-organic hybrid photovoltaic devices by uniform ordering of ZnO nanorods and near-atmospheric pressure nitrogen plasma treatment

Nagata

Volk

et al. 2013

Journal of Applied Physics

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Efficiency enhancement of organic photovoltaic devices using a Sm:Al compound electrode Appl. Phys. Lett. 102, 073301 (2013) Efficiency enhancement of organic photovoltaic devices using a Sm:Al compound electrode APL: Org. Electron. Photonics 6, 33 (2013) Electronic and interface properties of polyfluorene films on GaN for hybrid optoelectronic applications APL: Org. Electron. Photonics 6, 29 (2013) Electronic and interface properties of polyfluorene films on GaN for hybrid optoelectronic applications Appl. Phys. Lett. 102, 063303 (2013) A trilayer architecture for polymer photoconductors Appl. Phys. Lett. 102, 053304 (2013) Additional information on J. Appl. Phys. We investigated the performance of hybrid photovoltaic devices composed of ZnO and poly (3-hexylthiophene) (P3HT). The uniform ordering of ZnO nanorods (NRs) and nitrogen plasma treatment at near-atmospheric pressure offer advantages in modifying the ZnO NR surface. Uniform ordering of the ZnO NRs promoted the effective infiltration of P3HT, increasing the donor-acceptor interface area, which is directly related to short-circuit current density (J SC ). Nearatmospheric pressure treatment compensated carriers to form a highly resistant interlayer at the ZnO surface, which reduced carrier recombination and, as a result, increased the open circuit voltage (V OC ). Combining these two approaches achieved five-fold increase in J SC compared to that of the planar heterojunction, while the V OC was increased up to 0.71 V.

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Investigations into the Impact of the Template Layer on ZnO Nanowire Arrays Made Using Low Temperature Wet Chemical Growth

Cited by 44 publications

References 34 publications

Morphology and crystallinity control of wet chemically grown ZnO nanorods

Morphology and crystallinity control of wet chemically grown ZnO nanorods

Conductive white back reflector and scatter based on ZnO nanostructure arrays for harvesting solar energy

Improving the performance of inorganic-organic hybrid photovoltaic devices by uniform ordering of ZnO nanorods and near-atmospheric pressure nitrogen plasma treatment

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