Effect of the thermal annealing on the structural, morphological and photoluminescent properties of ZnO/Si multilayers

Ambrosio, Roberto; Galindo, Fabian; Morales-Morales, F.; Moreno, Mario; Torres, Alfonso; Vasquez-A, M. A.; Pérez‐García, Sergio Alfonso; Morales-Sánchez, A.

doi:10.1016/j.optmat.2019.109339

Cited by 9 publications

(2 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These features have made it desirable for several applications including photocatalysis [3], surface acoustic wave devices [4], photodetectors [5], gas sensors [6], light-emitting diodes [7,8], and solar cells [9]. ZnO lms has been produced using various methods such as thermal evaporation [10], pulsed laser [11], sol-gel spin-coated [12,13], spray pyrolysis [14], rf sputtering [15,16], electro deposition [17], dc-rf magnetron sputtering [18,19], metal-organic chemical vapor deposition [20], and so on. Among these coating methods, the sol-gel method is preferred by many researchers because of its advantages such as its simplicity, low cost, large area coatings, homogeneous composition, enabling lm thickness control [21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Highly c-axis Oriented ZnO Thin Films by Sol-gel Method

Kutlu¹,

Erdogan²,

Sedefoğlu³

et al. 2021

Preprint

View full text Add to dashboard Cite

This study reports the effect of annealing temperature on the structural, morphological, and optical properties of ZnO (Zinc Oxide) thin films deposited on a glass substrate by the sol-gel spin coating method. Those properties of ZnO were examined with UV-Vis, Fourier transform infrared (FTIR) and Raman spectroscopy, Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), and X-ray diffraction (XRD), before and after annealing. XRD results revealed that all the samples had a highly c-axis oriented wurtzite structure. A 1 (LO) mode in Raman spectra also confirmed the highly oriented ZnO films. Optical measurement indicated that transmittance of the films was above %85, and the optical band gap slightly decreased with the increasing annealing temperature from 350 to 550 °C. Morphological analysis displayed that increasing annealing temperature improved surface morphology and enlarged the grain size from 2-3 nm for as-deposited samples to 150 nm for annealed at 550 °C.

show abstract

Section: Introductionmentioning

confidence: 99%

Highly c-axis Oriented ZnO Thin Films by Sol-gel Method

Kutlu¹,

Erdogan²,

Sedefoğlu³

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…The improved catalytic activity, high charge carrier mobility and relatively high biocompatibility make the PSi/ZnO nanocomposite a perfect material for a reliable long-term multipurpose (bio)sensor [23][24][25][26]. Moreover, the outstanding properties of PSi/ZnO nanocomposites related to electroluminescence (EL) [27,28] and photoluminescence (PL) [29][30][31][32] can be tuned through morphology control, such as crystal size, porosity of PSi, and Si to ZnO ratio.…”

Section: Introductionmentioning

confidence: 99%

Porous Silicon-Zinc Oxide Nanocomposites Prepared by Atomic Layer Deposition for Biophotonic Applications

et al. 2020

View full text Add to dashboard Cite

In the current research, a porous silicon/zinc oxide (PSi/ZnO) nanocomposite produced by a combination of metal-assisted chemical etching (MACE) and atomic layer deposition (ALD) methods is presented. The applicability of the composite for biophotonics (optical biosensing) was investigated. To characterize the structural and optical properties of the produced PSi/ZnO nanocomposites, several studies were performed: scanning and transmission electron microscopy (SEM/TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), diffuse reflectance, and photoluminescence (PL). It was found that the ALD ZnO layer fully covers the PSi, and it possesses a polycrystalline wurtzite structure. The effect of the number of ALD cycles and the type of Si doping on the optical properties of nanocomposites was determined. PL measurements showed a “shoulder-shape” emission in the visible range. The mechanisms of the observed PL were discussed. It was demonstrated that the improved PL performance of the PSi/ZnO nanocomposites could be used for implementation in optical biosensor applications. Furthermore, the produced PSi/ZnO nanocomposite was tested for optical/PL biosensing towards mycotoxins (Aflatoxin B1) detection, confirming the applicability of the nanocomposites.

show abstract