Growth and properties of ZnO films on polymeric substrate by spray pyrolysis method

Kriisa, Merike; Kärber, Erki; Krunks, Malle; Mikli, Valdek; Unt, Tarmo; Kukk, Mart; Mere, Arvo

doi:10.1016/j.tsf.2013.05.150

Cited by 13 publications

(4 citation statements)

References 31 publications

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“…These advantages can be utilised in several applications such as: thin film solar cells, light emitting diodes and electroluminescent devices [4] , antireflection coatings and optical filters [5] . There are many techniques such as pulsed-laser deposition (PLD), sputtering [6] , chemical vapour deposition (CVD) [7] , molecular beam epitaxial (MBE) [8] , atomic layer epitaxial (ALE) [9] , thermal evaporation [10] , as well as spray pyrolysis [11] , sol-gel [12] , electro-deposition [13] and chemical bath deposition (CBD) [14] have been used to fabrication ZnS thin films. However, compared to the other deposition method, ultrasonic spray is widely used for the synthesis of nano-materials and high quality thin films and known as the most suitable method for preparing thin layers of ZnS, due to it beingeconomical, simple, feasible, flex-ible, cost effective, convenient for large-area deposition at low temperatures and it allows easy deposition in the atmospheric condition.…”

Section: Introductionmentioning

confidence: 99%

Solution flow rate influence on ZnS thin films properties grown by ultrasonic spray for optoelectronic application

et al. 2018

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The aim of this work is to investigate the dependence of ZnS thin films structural and optical properties with the solution flow rate during the deposition using an ultrasonic spray method. The solution flow rate ranged from 10 to 50 mL/h and the substrate temperature was maintained at 450 °C. The effect of the solution flow rate on the properties of ZnS thin films was investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), optical transmittance spectroscopy (UV–V) and the four-point method. The X-ray diffraction analysis showed that the deposited material was pure zinc sulphide, it has a cubic sphalerite structure with preferential orientation along the (111) direction. The grain size values were calculated and found to be between 38 to 82 nm. SEM analysis revealed that the deposited thin films have good adherence to the substrate surfaces, are homogeneous and have high density. The average transmission of all films is up more than 65% in the range wavelength from 200 to 1100 nm and their band gap energy values were found between 3.5–3.92 eV. The obtained film thickness varies from 390 to 1040 nm. Moreover, the electric resistivity of the deposited films increases with the increasing of the solution flow rate between 3.51 × 105 and 11 × 105 Ω·cm.

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Section: Introductionmentioning

confidence: 99%

Solution flow rate influence on ZnS thin films properties grown by ultrasonic spray for optoelectronic application

et al. 2018

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“…The subject related to the applications of ZnO was boosted with the advantage of the easy synthesis process compared to the other competitive compounds, such as gallium nitride (GaN) and silicon carbide (SiC). Moreover, ZnO can be synthesised through different processes, and films were grown on different low-cost substrates, such as ordinary papers [18], polymers [19,20], slide glasses [15], and silicon wafers [10]. Furthermore, high-quality ZnO can be prepared using simple methods with repeatable characteristics, including methods such as radio frequency (RF) magnetron sputtering [21], low temperature hydrothermal processes [22,23], thermal evaporation [24,25], sol-gel [26], electrodeposition [27], and chemical vapour deposition (CVD) [28].…”

Section: Introductionmentioning

confidence: 99%

Ultraviolet Sensors Based on Two-Dimensional Zinc Oxide Structures

Al-Hardan¹,

Hamid²,

RoslindaShamsudin³

et al. 2017

Optoelectronics - Advanced Device Structures

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In this chapter, we review the application of zinc oxide (ZnO) in ultraviolet (UV) sensing and emphasise on the two-dimensional (2D) ZnO structures. The synthesis of 2D ZnO structures, the morphologies, and the photoluminescence emission will be reviewed and highlighted. The performance of the UV sensors based on 2D ZnO structures is explored. The lack in the study of the 2D ZnO UV sensors might be due to the difficulties of controlling the growth of the 2D ZnO compared to the one-dimensional (1D) ZnO structures.

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“…The minimum requirement for the transparency of the optical window material has been reported to be 70% . Another important optical parameter that indicates the ability of the material scatter the light is haze factor approach . The haze factor vs. wavelength spectra for the ZnS layers deposited at different growth temperatures are presented in figure .…”

Section: Resultsmentioning

confidence: 99%

Spray pyrolysis deposition and characterization of highly c‐axis oriented hexagonal ZnS nanorod crystals

Dedova

Gromyko

Krunks

et al. 2014

Crystal Research and Technology

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Here we demonstrate that highly c‐axis oriented vertically aligned hexagonal ZnS nanorod‐like crystals have been synthesized via a facile and low‐cost spray pyrolysis method. ZnS layers were grown onto soda‐lime glass (SGL), glasses covered with transparent conductive oxides (TCOs: ITO and FTO) and silicon wafer substrates using zinc chloride and thiocarbamide precursors solution and air as carrier gas. The effect of main technological parameters on formation and properties of ZnS nanorods are studied. SEM, XRD, PL and UV‐VIS were applied to characterize the ZnS layers. Dimensions of the ZnS rods are mainly controlled by the deposition temperature, precursor concentration and substrate type. For instance, rods with d = 80–100 nm and l = 450 nm were obtained using ZnCl2 with c = 0.1 mol/L; whereas rods with d = ca. 80 nm and l = 250 nm were produced from ZnCl2 with c = 0.05 mol/L on glass. According to PL study, such defects as sulphur vacancies (Vs) are present in the ZnS samples, and concentration of Vs decreases with increasing the sulphur amount in solution. According to UV‐VIS, all ZnS layers possess high optical transmittance ca. 80% in the visible spectrum region; the Eg of ZnS is 3.7 eV independent of the deposition conditions, corresponding to wurtzite ZnS. ZnS rods produced at 550 and 580 °C show high haze factor values of ca. 90% at 320–350 nm revealing high light scattering ability. Vertically aligned, uniform in size ZnS rods can be directly grown onto glass, TCO and silicon substrates.

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Growth and properties of ZnO films on polymeric substrate by spray pyrolysis method

Cited by 13 publications

References 31 publications

Solution flow rate influence on ZnS thin films properties grown by ultrasonic spray for optoelectronic application

Solution flow rate influence on ZnS thin films properties grown by ultrasonic spray for optoelectronic application

Ultraviolet Sensors Based on Two-Dimensional Zinc Oxide Structures

Spray pyrolysis deposition and characterization of highly c‐axis oriented hexagonal ZnS nanorod crystals

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