Enhanced electrical and optoelectronic properties of W doped SnO2 thin films

Senthilkumar, P.; Raja, S.; Babu, R. Ramesh; Vasuki, G.

doi:10.1016/j.optmat.2022.112234

Cited by 24 publications

(13 citation statements)

References 63 publications

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“…Both the SnO 2 films exhibit similar UV-vis transmittance spectra due to the extremely low doping concentration of the W element, which will not change the optical band gaps of the W doped SnO 2 films. [24,25] Current-voltage curves are measured for the SnO 2 films in Figure 1b. The 2.5 mg mL À 1 WÀ SnO 2 film exhibits slightly larger slope in the current-voltage curve compared with the reference SnO 2 film, indicating that electron conductivity of the 2.5 mg mL À 1 WÀ SnO 2 is enlarged upon W doping.…”

Section: Resultsmentioning

confidence: 99%

Enhance the efficiency of perovskite solar cells using W doped SnO₂ electron transporting layer

Cheng,

Li,

Zheng

et al. 2024

ChemPhotoChem

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For low temperature (≤180 °C) processed perovskite solar cells (PSCs), SnO2 has been proven to be one of the most effective electron transporting layer. However, problems, such as poor electric conductivity and high defect density, inevitably exist in the SnO2 films which are fabricated using low temperature solution methods. Element doping of SnO2 film is a feasible strategy to alleviate the above problems. Herein, W doping of the SnO2 is realized through addition of ammonium tungstate hydrate into the molecular precursor of SnO2. The W doped SnO2 film exhibits higher conductivity, and can better extract and transport the electrons from the perovskite films. Hence, power conversion efficiency is boosted from 20.60% for the reference PSCs to 21.83% for PSCs fabricated on 2.5 mg mL‐1 ammonium tungstate hydrate doped SnO2 films.

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Section: Resultsmentioning

confidence: 99%

Enhance the efficiency of perovskite solar cells using W doped SnO₂ electron transporting layer

Cheng,

Li,

Zheng

et al. 2024

ChemPhotoChem

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“…SnO 2 and Sn(Fe : Ni)O 2 nanoparticles exhibit a rutile phase with space group P42/mnm and are well matched to the bulk SnO 2 standard values (JCPDS card no. 41–1445) [ 30 ]. In addition, no secondary phase was observed in the XRD diffraction peaks of Sn(Fe : Ni)O 2 nanoparticles.…”

Section: Resultsmentioning

confidence: 99%

Assessment of Structural, Optical, and Antibacterial Properties of Green Sn(Fe : Ni)O2 Nanoparticles Synthesized Using Azadirachta indica Leaf Extract

Aloufi

2023

Bioinorganic Chemistry and Applications

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Metal oxide nanoparticles have attained notable recognition due to their interesting physicochemical properties. Although these nanoparticles can be synthesized using a variety of approaches, the biological method involving plant extracts is preferred since it provides a simple, uncomplicated, ecologically friendly, efficient, rapid, and economical way for synthesis. In this study, the Azadirachta indica leaf extract was used as a reducing agent, and a green process was used to synthesize tin(ferrous: nickel)dioxide (Sn(Fe : Ni)O2) nanoparticles. The synthesized nanoparticles were subjected to characterization by using X-ray diffraction (XRD), energy-dispersive X-ray (EDX) spectroscopy analysis, field emission scanning electron microscopy (FESEM), Fourier transform infrared (FTIR) spectroscopy, dynamic light scattering (DLS), and photoluminescence (PL) measurement. Furthermore, Sn(Fe : Ni)O2 nanoparticles were analyzed for their antimicrobial activity against Gram-positive and Gram-negative organisms including Staphylococcus aureus, Streptococcus pneumoniae, Bacillus subtilis, Klebsiella pneumoniae, Escherichia coli, and Pseudomonas aeruginosa bacterial strains. XRD patterns revealed that Sn(Fe : Ni)O2 nanoparticles exhibited a tetragonal structure. The hydrodynamic diameter of the nanoparticles was 143 nm, as confirmed by the DLS spectrum. The FESEM image showed the spherical form of the synthesized nanoparticles. Chemical composites and mapping analyses were performed through the EDAX spectrum. The Sn–O–Sn and Sn–O stretching bands were 615 cm−1 and 550 cm−1 in the FTIR spectrum, respectively. Various surface defects of the synthesized Sn(Fe : Ni)O2 nanoparticles were identified by photoluminescence spectra. Compared to traditional antibiotics like amoxicillin, the inhibition zone revealed that Sn(Fe : Ni)O2 nanoparticles displayed remarkable antibacterial activity against all tested organisms, indicating the valuable potential of nanoparticles in the healthcare industry.

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“…Raman spectroscopy observed the polycrystalline phase after annealing the films at 350 °C for 30 min in the air [15]. The system in hand which can help discovering the crystallinity at nanoscale level is the scanning electron microscopy .The scanning electron microscopy images of glass/WO 3 which are illustrated in the inset of figure 1 the ionic radius of W +6 being 67 pm [16] is less than that of Pb +2 (149 [12]) the grain sizes of Pb increase due to the diffusion of unbonded W +6 ions into vacant sites of Pb [17,18]. In addition, as indicated by the x-ray diffraction technique, the presence of lead oxide in the lead films forces interaction between unbonded W and oxygen of Pb 2 O 3 at the ultrathin interface between Pb and WO 3 .…”

Section: Structural and Morphological Analysesmentioning

confidence: 99%

Lead-tungsten oxide interfaces designed as gigahertz/terahertz filters

Alkhamisi¹,

Qasrawi

Khanfar

2023

Phys. Scr.

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Herein amorphous tungsten oxide thin films of thicknesses of 300 nm are coated onto semitransparent Pb films (100 nm) by the thermal evaporation technique under a vacuum pressure of 10-5 mbar. Optical investigations in these films have shown that Pb nanosheets enhances the light absorbability in the visible and infrared ranges of light without significant change in the energy band gap value. In addition deep analyses of the optical conductivity and terahertz cutoff frequency spectra of the Pb/WO3 optical filters revealed that the cutoff frequency value in the visible range of light is invariant with light signal energy indicating the possibly of filtering none-monochromatic light signals. On the other hand imposing an ac signal between the terminals of Pb/WO3/Au devices has proofed the ability of the device to perform as low pass and as band stop filters workable in the microwave frequency domain. The microwave cutoff frequency for this device reached ~9 GHz nominating it for use in 5G mobile technology. The current study showed that coating of tungsten oxide onto semitransparent Pb substrate and coverage small area of the top contact with Au can allow functioning the device as gigahertz/ terahertz band filters suitable for communication technology.

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Enhanced electrical and optoelectronic properties of W doped SnO2 thin films

Cited by 24 publications

References 63 publications

Enhance the efficiency of perovskite solar cells using W doped SnO₂ electron transporting layer

Enhance the efficiency of perovskite solar cells using W doped SnO₂ electron transporting layer

Assessment of Structural, Optical, and Antibacterial Properties of Green Sn(Fe : Ni)O2 Nanoparticles Synthesized Using Azadirachta indica Leaf Extract

Lead-tungsten oxide interfaces designed as gigahertz/terahertz filters

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Enhanced electrical and optoelectronic properties of W doped SnO2 thin films

Cited by 24 publications

References 63 publications

Enhance the efficiency of perovskite solar cells using W doped SnO2 electron transporting layer

Enhance the efficiency of perovskite solar cells using W doped SnO2 electron transporting layer

Assessment of Structural, Optical, and Antibacterial Properties of Green Sn(Fe : Ni)O2 Nanoparticles Synthesized Using Azadirachta indica Leaf Extract

Lead-tungsten oxide interfaces designed as gigahertz/terahertz filters

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Enhance the efficiency of perovskite solar cells using W doped SnO₂ electron transporting layer

Enhance the efficiency of perovskite solar cells using W doped SnO₂ electron transporting layer