Studying Mn- and Ni-doped ZnO Thin Films Synthesized by the Sol–Gel Method

Ghazi, M. E.; Izadifard, Morteza; Ghodsi, F. E.; Yuonesi, M.

doi:10.1007/s10948-011-1213-6

Cited by 21 publications

(5 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The half-metallic ferromagnetism behavior takes an important source for the newly developing field of spintronic because that is origin of spin-polarized carriers injected into the DMS materials. Especially, in the last 3 years, recent theoretical and experimental [32][33][34][35][36][37][38][39][40][41][42] studies focused on the analysis of existence of ferromagnetism in the DMS-based II-VI and III-V semiconductors doped with transition metal elements in order to investigate the possibility to use them in the spintronic devices. Generally, we realize the III-V DMS by substitution the III cation sites with transition metal atoms (TM) becomes as follows III 1−x TM x V DMS.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Predictions of Electronic Structure and Half-Metallic Ferromagnetism in Al1−x Mn x P Diluted Magnetic Semiconductors

Boutaleb

Doumi

Sayede

et al. 2014

J Supercond Nov Magn

View full text Add to dashboard Cite

The structural, electronic, and half-metallic ferromagnetic properties of ordered zinc blende Al 1−x Mn x P diluted magnetic semiconductors with concentrations (x = 0.0625, 0.125, and 0.25) are studied using firstprinciple calculations of density functional theory in order to seek out the possibility to use these materials for the spin injection in the field of spintronic applications. The electronic structures of Al 1−x Mn x P at all concentrations exhibit a half-metallic ferromagnetic behavior with 100 % magnetic spin polarization and half-metallic gap. While, the analysis of partial densities of states reveals that strong hybridization between 3p (P) and 3d (Mn) partially filled states dominates the gap, which stabilizes the ferromagnetic state configuration associated with double-exchange mechanism. Also, the magnetic proprieties prove an integer total magnetization of 4 u B that confirms the half-metallic ferromagnetic feature of Al 1−x Mn x P compounds.

show abstract

Section: Introductionmentioning

confidence: 99%

Theoretical Predictions of Electronic Structure and Half-Metallic Ferromagnetism in Al1−x Mn x P Diluted Magnetic Semiconductors

Boutaleb

Doumi

Sayede

et al. 2014

J Supercond Nov Magn

View full text Add to dashboard Cite

show abstract

“…Ghazi et al, corroborating that the crystallite size decreases linearly with the ionic radius. [ 44 ] A relatively smaller ionic radius of dopants shrinks the ZnO lattice resulting in a decrease in the relative intensity of the diffraction peaks and their corresponding left shift. [ 45,46 ] This can be confirmed in our results reported in supplementary material, where it is possible to observe the relative intensity peak differences, where doped samples display a reduction of the intensity with reference to the undoped sample (Table S1, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Carbon Dioxide Detectors based on Al‐ and Ni‐Doped ZnO

Lozano-Rosas

Hernandez

Elizalde-González

et al. 2022

Physica Status Solidi (a)

View full text Add to dashboard Cite

Humanity all around the world currently faces two serious challenges: global warming and the COVID-19 pandemic. It is well known that the earth's atmosphere is composed of greenhouse gases that act as a shielding blanket, keeping the global temperature in an optimal range. [1] The three main greenhouse gasses which have presented a significant increment in the course of the industrial period are carbon dioxide (CO 2 ), methane (CH 4 ), and nitrous oxide (N 2 O). [2] CO 2 plays a primary role in global warming because of its production due to a wide range of sources like manufacturing processes, automobiles, human respiration, decomposition, ocean release, etc. [3] In contrast, from December 2019 to date, the COVID-19 pandemic is causing a global impact on every sector of society. [4] One of the strategies of mitigation for the pandemic has been CO 2 concentration monitoring in enclosed spaces to measure indoor ventilation requirements and thus reduce the risk of contagion by the aerosol transmission of the virus. Also, it is clear that CO 2 monitoring has become mandatory to maintain air quality.The values of CO 2 concentration in outdoor ambient air are %400 ppm. [5] Regarding CO 2 concentrations in internal environments, the reality is different depending on the country, specific location, and ventilation system; however, according to the document "Recommendations for operation and maintenance of air conditioning and ventilation systems of buildings and premises for the prevention of the spread of SARS-Cov-2" from Spanish Ministry of Health, for good quality air, it is considered that the concentration of CO 2 in the indoor environment with respect to its concentration in the outdoor environment, should not be higher than 500 ppm. [6] ðCO 2 indoor À CO 2 outdoorÞ < 500 ppm CO 2(1)The first decade of the 21 st century was witness to massive production of sensors, [7] driven principally by the growing concern of global warming. However, new sensing technologies were emerged in the past decade, such as calorimetric sensors (CB), metal-oxide-semiconductor field-effect transistor (MOSFET), conducting polymer sensors, electrochemical sensors (EC), metal-oxide semiconductor (MOS), optical sensors, quartz crystal microbalance (QMB), and surface acoustic wave (SAW). [8] Among these, MOS sensors are mostly investigated, due to their excellent sensitivity, very short response times, low cost, minimal noise, small size, low power consumption for adequate battery life, detection of both oxidizing and reducing gases, easy fabrication, and are excellent candidates for miniaturization with high portability. [9][10][11] There is a wide variety of metal oxides employed for CO 2 detection, including pristine materials:

show abstract

“…The size with changing CdS deposition time. The band gap energy increases with decr average crystallite size and rising molar concentration of parent samples because quantum confinement effect [23]. Therefore, the transmittance behavior of fabricate thin films is improved in the visible range, and an energy gap of about 2.3 eV su their suitability for use in solar cell applications.…”

Section: Optical Propertiesmentioning

confidence: 99%

“…However, CBD as a low-cost and low-temperature technique could produce CdS thin films with high uniformity and large-scale area. In general, CBD is a direct and cheap method that enables the deposition of several chalcogenides including CdSe, ZnO, Sb 2 Se, Bi 2 Se, ZnS, and CuS where many parameters such as pH, precursor concentrations, and bath temperature could be employed to have different material shapes and properties [18][19][20][21][22][23]. Recently, many papers were published on different properties and features of bulk CdS grown using CBD [13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Influence of Deposition Time on Structural, Morphological, and Optical Properties of CdS Thin Films Grown by Low-Cost Chemical Bath Deposition

El-Shaer,

Ezzat,

Habib

et al. 2023

Crystals

View full text Add to dashboard Cite

CdS thin films were deposited on glass substrates employing low-cost and low-temperature chemical bath deposition (CBD). The effect of deposition time on the fabricated sample’s properties was investigated by XRD, SEM, EDX, Raman, UV-vis spectrophotometry, and PL spectroscopy. XRD results indicate the formation of cubic and hexagonal structures of CdS thin films. The calculated average crystal size ranged from 21–50 nm. SEM results indicate the formation of hierarchical nanoflakes where the nanoflakes are entangled with one another like plant roots. Raman study confirmed that the fabricated thin films have two distinct peaks that are centered at 298 cm−1 and 599 cm−1, which are characteristic vibration modes for CdS thin film. UV-vis absorption spectra indicate absorption band edges near 500 nm, which are related to the band gap values of CdS thin films. The estimated Eg of CdS thin films was reduced from 2.4 to 2.22 eV as the deposition time increased from 5 to 60 min. PL results show the main peak centered at 537 nm, its intensity decreasing as deposition time increases, indicating lower recombination of charge carriers. Our results reveal that CdS thin films are an excellent candidate for optoelectronic applications.

show abstract

Studying Mn- and Ni-doped ZnO Thin Films Synthesized by the Sol–Gel Method

Cited by 21 publications

References 25 publications

Theoretical Predictions of Electronic Structure and Half-Metallic Ferromagnetism in Al1−x Mn x P Diluted Magnetic Semiconductors

Theoretical Predictions of Electronic Structure and Half-Metallic Ferromagnetism in Al1−x Mn x P Diluted Magnetic Semiconductors

Carbon Dioxide Detectors based on Al‐ and Ni‐Doped ZnO

Influence of Deposition Time on Structural, Morphological, and Optical Properties of CdS Thin Films Grown by Low-Cost Chemical Bath Deposition

Contact Info

Product

Resources

About