Electro-optical characterization of ZnO/ZnMgO structure grown on p-type Si (111) by PA-MBE method

Pietrzyk, M.A.; Zielony, E.; Stachowicz, M.; Reszka, A.; Płaczek‐Popko, E.; Wierzbicka, Aleksandra; Przeździecka, E.; Droba, Anna; Kozanecki, A.

doi:10.1016/j.jallcom.2013.10.256

Cited by 22 publications

(17 citation statements)

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“…Hydrophobic ZnO nanoarrays have been deposited by several techniques such as pulsed laser deposition, 49 4 OH, Alfa Aesar), sodium hydroxide (NaOH, Alfa Aeasar, 99.6%), hexamethylene tetra-ammine (C 6 H 12 N 4 (HMT), ADWIC, 99%), and hydrochloric acid (HCl, Alfa Aesar, 98%) were used as received from the supplier.…”

Section: 44mentioning

confidence: 99%

“…Before use, the glass substrates were washed for 45 min in boiled dilute sulfuric acid (1 : 10 v/v) and then thoroughly rinsed in ethanol, acetone, and deionized (DI) water subsequently. Analytical reagents of ZnSO 4 were dissolved in diluted ammonia to obtain a zinc ammonium complex solution. This solution was then served as a cationic precursor.…”

Section: Deposition Of Zno Nano-seeds Layermentioning

confidence: 99%

“…The SILAR growth is a four step process involving subsequent immersion of cleaned glass substrate in cationic and anionic solution along with rinsing the substrate in between in DDW kept at room temperature. In the rst step, the substrate was immersed in a beaker containing Zn(SO 4 …”

Section: Deposition Of Zno Nano-seeds Layermentioning

confidence: 99%

“…ZnO nanostructures exhibit strong spontaneous piezoelectric polarization because of their wurtzite structure, a hexagonal lattice in which the Zn 2+ ions occupy the tetrahedral sites formed by the O 2À ions. 4 ZnO surfaces display better photocatalytic performance in the degradation of hazard dye molecules in both basic and acidic medium. 5 ZnO lms have thermal diffusivity in the range of (4.35-5.03) Â 10 À2 cm 2 s À1 and electrical resistivity varying from 10 À4 to 10 12 U cm.…”

Section: Introductionmentioning

confidence: 97%

“…7 These distinctive physicochemical and optoelectronic properties of the transparent ZnO semiconductor material still stimulate enormous awareness for usage in a variety of industrial and technological applications. ZnO lms are suitable for monitoring of some gasses like CO and H 2 S and CH 4 . 8 ZnO is considered as a next-generation light-emitting diode (LED) and room temperature (RT) polariton lasers.…”

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Nanostructured ZnO thin films for self-cleaning applications

2017

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Controlling the properties of nanostructured zinc oxide (ZnO) is an interesting way to broaden its multifunctionality. ZnO nanostructured films were grown on glass substrates under different conditions by a simple two-step wet chemical method. A low-cost successive ionic layer adsorption and reaction (SILAR) method was used to grow ZnO seed layers at 80 C. Then, different hierarchical based ZnO nanostructured thin films were deposited onto the ZnO seed layers by chemical bath deposition (CBD).The influence of deposition time (t D ) and pH on the surface morphology, wettability behavior, structural and optical properties of the ZnO nanostructured films were systematically investigated. The structural, morphological, optical and wetting properties were studied by X-ray diffraction (XRD), field emission scanning microscopy (FE-SEM), UV-Vis spectrophotometer, and water contact angle (WCA) measurement, respectively. The surface morphology revealed a complex and orientated hierarchical based ZnO nanostructured films with diverse shapes from hexagonal nanorods to hexagonal nanoplates and even much more complex plates/rods and flower-like shapes by changing deposition time and pH of the precursor. XRD results confirm the synthesis of nanostructured ZnO of the hexagonal structure with a preferential orientation along the (002) lattice plane. The average crystallite size, D, is altered between 41.41 to 68.43 nm dependent on the morphology of the ZnO film and pH of the precursor. At pH 6.5, the films are hydrophilic for 10 h # t D # 6 h and hydrophobic for 6 h < t D < 10 h. The wetting properties of the films were enhanced by increasing or decreasing pH around 6.5. Morphology and thickness of the ZnO nanostructure could efficiently control the transmittance, absorbance, optical band gap, and the extinction coefficient of the films. The optical band gap is blue shifted from 2.45 to 3.62 eV@pH 6.5 as the deposition time increased from 2 to 8 h and blue shifted from 2.72 to 3.62 eV@8 h as the pH value increased from 5.5 to 6.5. The existence of stable hydrophobic zinc oxide nanostructured films at room temperature at a large-scale and with band gaps around 3.62 eV supports their use in selfcleaning and gas sensing applications.

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Section: 44mentioning

confidence: 99%

Section: Deposition Of Zno Nano-seeds Layermentioning

confidence: 99%

Section: Deposition Of Zno Nano-seeds Layermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

mentioning

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