Interlayer effect on photoluminescence enhancement and band gap modulation in Ga-doped ZnO thin films

Atiq, Shahid; Ansar, Muhammad Tamoor; Hassan, Ali; Abbas, S. Kumail; Iqbal, Taswar; Aslam, Mushtaq; Iqbal, Munawar; Mahmood, Asif

doi:10.1016/j.spmi.2020.106576

Cited by 24 publications

(3 citation statements)

References 31 publications

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“…Thus, the charge transfer process from deep-level emission sites is blocked. Consequently, hot electrons from the metal Fermi level can easily transfer towards the deep-level emission sites which enhances the carrier concentration in deep levels, and ultimately more emission from DLE originates [48]. Furthermore, a significant near-band-edge emission enhancement has been recorded in the case of Ag@CdS which is a result of localized surface plasmon coupling as reported earlier [49,50].…”

Section: Resultssupporting

confidence: 54%

Surface-enhanced Raman scattering to realize the phonon processes in Ag nanoparticles-decorated CdS thin film

Iqbal,

Shabbir,

Toqeer

et al. 2024

Phys. Scr.

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Surface-enhanced Raman spectroscopy (SERS) technique can achieve an ultra-high sensitivity (i.e., down to the single-molecule level) via coinage-metal nanostructures such as silver, gold, copper, etc. In this work, a geometry is proposed that consists of silver nanoparticles (AgNPs) decorated on cadmium chloride (CdCl2) annealed cadmium sulfide (CdS) thin film on a glass substrate. A strong SERS enhancement in AgNPs on CdCl2 annealed CdS thin films is achieved, which is twelve times larger than the scattering from the bare CdCl2 annealed CdS thin film. The improved SERS signal allows us to observe fundamental phonon processes in CdCl2 annealed CdS thin film. Moreover, a finite difference time domain (FDTD) method is used to understand the underlying SERS physics. By using the FDTD method, robust electromagnetic field localization in the nanogap between AgNPs and at the contact point of Ag NPs and CdS thin film is studied.

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Section: Resultssupporting

confidence: 54%

Surface-enhanced Raman scattering to realize the phonon processes in Ag nanoparticles-decorated CdS thin film

Iqbal,

Shabbir,

Toqeer

et al. 2024

Phys. Scr.

Self Cite

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“…Firstly, acetone vapor, deionized (DI) water, and methanol have been used to clean the surface of CaF 2 prism before coupling the nanolayer of Ag metal layer. The thermal evaporation system has been used to deposit the nanolayer of Ag metal on the surface of CaF 2 prism by the physical vapour deposition (PVD) [32]. The liquid exfoliation method has been used to make the nanolayer of Bi 2 Te 3 , after that it is deposited on top of Ag metal.…”

Section: Experimental Feasibilitymentioning

confidence: 99%

Simulation study of reconfigurable surface plasmon resonance refractive index sensor employing bismuth telluride and MXene nanomaterial for cancer cell detection

et al. 2023

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In this study, a highly angular sensitive surface plasmon resonance (SPR) biosensor has been designed for cancer cell detection. The proposed surface plasmon resonance biosensor structure is based on Kretschmann configuration, which works on an angular interrogation technique. The proposed SPR biosensor has enormous possibility to detect the various kind of cancer cells. The refractive index alteration of different cancerous (skin, cervical and blood) cells is 1.360-1.390. The proposed SPR biosensor is stacked with multilayers having CaF2 prism, silver metal, Bi2Te3 and MXene layers. The performance parameters like angular sensitivity, quality factor, detection accuracy, and electric field intensity distribution have been optimized in this article. Here, various kind of cancer cells (skin, cervical and blood) have been also analyzed and corresponding angular sensitives are 252.20, 305.70 and 319.46 deg/RIU respectively. The proposed SPR biosensor shows best results for blood cancer cell detection. Some other important performance parameters like detection accuracy, quality factor, and electric field intensity distribution have also been calculated for proposed SPR biosensor device. The simulation results have been performed by MATLAB 2019a software. The proposed SPR biosensor design may open a new way for the medical industry.

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“…MO are on the cutting edge of technology in various field of science such as water splitting [2][3][4], energy storage and conversions [5,6], photoluminescence (PL) [7][8][9] and transparent conducting oxide [1,10,11]. This is because of their band gap located directly at the Г point which was determined theoretically and experimentally to be around few electron volts (eV) [12][13][14]. The MO denoted by the AB2O4 formula are usually referred to as spinel family group, which contains around 120 compound members with ZnAl2O4 (known as zinc aluminate or gahnite) being one of the prominent species in the PL field [1,15].…”

Section: Introductionmentioning

confidence: 99%

Effects of Varying Alx Moles on the Structure and Luminescence Properties of ZnAlxO1.5x + 1:0.1% Tb3+ Nano Phosphor Prepared using Citrate sol-gel Method

Maphiri

Melato

Mhlongo

et al. 2021

Preprint

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Un-doped and ZnAlxO(1.5x + 1):0.1% Tb3+ (ZAOT) nano-powders were synthesized via citrate sol-gel method. The Alx moles were varied in the range of 0.25 ≤ x ≤ 5.0. The X-ray powder diffraction (XRD) data revealed that for the x < 1.5, the prepared samples crystal structure consists of mixed phases of the cubic ZnAl2O4 and hexagonal ZnO phases, while for the x ≥ 1.5 the structure consists of single phase of cubic ZnAl2O4. This was confirmed by the Raman and Fourier-Transform Infrared (FTIR) vibrational spectroscopy. Scanning electron microscopy (SEM) showed that varying Alx moles influences the morphology while Transmission electron microscopy (TEM) shows the dual morphology at x < 1.5. The photoluminescence (PL) revealed intense and distinct emissions attributed to both the host and Tb3+ transitions. The emission intensity highly depends on the Alx moles. The International Commission on Illumination (CIE) colour chromaticity showed that the emission colour could be tuned by varying the Alx moles.

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Interlayer effect on photoluminescence enhancement and band gap modulation in Ga-doped ZnO thin films

Cited by 24 publications

References 31 publications

Surface-enhanced Raman scattering to realize the phonon processes in Ag nanoparticles-decorated CdS thin film

Surface-enhanced Raman scattering to realize the phonon processes in Ag nanoparticles-decorated CdS thin film

Simulation study of reconfigurable surface plasmon resonance refractive index sensor employing bismuth telluride and MXene nanomaterial for cancer cell detection

Effects of Varying Alx Moles on the Structure and Luminescence Properties of ZnAlxO1.5x + 1:0.1% Tb3+ Nano Phosphor Prepared using Citrate sol-gel Method

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