Study of structural and surface morphological properties of Tb doped ZnO nanoparticles using XRD, XPS and fractal analysis

Kumar, Anil; Sharma, Anshu; Bhasker, S. Uday; Yadav, R. P.; Bhasker, H. P.; Priya, Pradip Kumar; Pandey, Kaushlendra; Mandal, Subinay; Anand, Rahul

doi:10.1088/2053-1591/ab445f

Cited by 14 publications

(8 citation statements)

References 65 publications

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“…UV light helps the adsorption of oxygen species on the surface of ZnO nanoparticle and alter the WF value. 32,34 As a result, under 1 sun illumination due to the presence of UV light, a reduction in the WF value is expected, which contributes to a superior energy level alignment. In contrast, in indoor lighting conditions and the absence of the UV light the initial reduction of the WF is recovered, leading to an imperfect energy level alignment.…”

Section: Resultsmentioning

confidence: 99%

“…UV light helps the adsorption of oxygen species on the surface of ZnO nanoparticle and alter the WF value. 32,34 As a result, under 1…”

Section: Effect Of Interfacial Layers Peie and Polylysine On The Perf...mentioning

confidence: 99%

“…[29][30][31] 33 For the devices that perform under 1 sun, UV light aids in the adsorption of oxygen species on the surface of ZnO nanoparticle and alters the WF value. 34 In indoor lighting condition, the defective performance of the ZnO-based devices without IFL was perceived, originating from the absence of UV light in the spectra of LED lamps, leading to a massive voltage loss. As a result, under 1 sun illumination due to the presence of UV light, a reduction in the WF value was expected, favouring better energy level alignment.…”

Section: Introductionmentioning

confidence: 99%

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Effect of PEIE and polylysine as interfacial layers on the performance of air-processed organic solar cells under both indoor and 1 sun conditions

Lomeri

Polino

Podapangi

et al. 2023

Sustainable Energy Fuels

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Section: Resultsmentioning

confidence: 99%

“…UV light helps the adsorption of oxygen species on the surface of ZnO nanoparticle and alter the WF value. 32,34 As a result, under 1…”

Section: Effect Of Interfacial Layers Peie and Polylysine On The Perf...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of PEIE and polylysine as interfacial layers on the performance of air-processed organic solar cells under both indoor and 1 sun conditions

Lomeri

Polino

Podapangi

et al. 2023

Sustainable Energy Fuels

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“…The atomic percentages of the elements present in the Sn 1– x Nd x O 2 nanostructures can be determined by using the following formula: where A X ( A i ) and S X ( S i ) represent the area of the peak and sensitivity factor of elements, x ( i ), respectively. N is the total number of elements in the sample.…”

Section: Resultsmentioning

confidence: 99%

Improved Room-Temperature Ferromagnetism in Nd-Doped SnO₂ Nanostructures through Defect Engineering

et al. 2021

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Many efforts have been made to introduce roomtemperature ferromagnetism (RTFM) in metal oxide semiconductors doped with either magnetic or nonmagnetic ions for their suitable application in spintronics in the past few years. However, it is not yet well understood whether the origin of RTFM in these systems is intrinsic or because of magnetic clusters. Hence, we report detailed experimental investigations on RTFM in Nd-doped SnO 2 nanostructures synthesized using a sol−gel process, which has potential spintronics application. In the present work, we observe that defects/ oxygen vacancies play a crucial role in improving the RTFM in SnO 2 doped with Nd ions. The presence of oxygen vacancies in the prepared samples was confirmed by Raman scattering, X-ray photoelectron spectroscopy (XPS), and photoluminescence (PL) spectroscopy. The enhancement of the density of oxygen vacancies was further quantified by the deconvoluted core-level O 1s XPS spectra. All samples exhibited RTFM with a small contribution of paramagnetic (PM) ordering. These phases (FM + PM) were established by fitting all M−H curves using a two-phase theoretical model. Furthermore, the Curie−Weiss and spin wave (CWSW) model fitted the M−T curve well, which also indicated the existence of the two phases in our systems. The overlapping of bound magnetic polarons occurred because of the exchange interaction between Nd 3+ ions and electrons trapped in oxygen vacancies; this overlap is responsible for introducing RTFM in Nd-doped SnO 2 . Hence, the origin of RTFM can be mostly explained by the bound magnetic polaron (BMP) model.

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“…Thin-film-based devices have attracted lots of attention, as thin films exhibit physical and chemical properties different from those of the same material in bulk. − In the case of thin-film and nanostructure devices, the surface to volume ratio is large compared to bulk material. , The surface morphology of thin films (nanostructure) influences the functional properties of SCs, which play a major role in energy storages. Therefore, a detailed knowledge of the surface morphology is important for the fabrication of devices having the desired properties .…”

Section: Introductionmentioning

confidence: 99%

Effect of Fe Doping on the Surface Morphology and Supercapacitor Properties of Sr(OH)₂ Thin Films: A Fractal Approach

Yadav

Priya

et al. 2021

J. Phys. Chem. C

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Fractal concepts have been employed to explore the morphological evolution of Sr(OH) 2 thin films prepared by the successive ionic layer adsorption and reaction (SILAR) method on stainless steel (SS) substrate. The surface morphology of each sample was captured using atomic force microscopy (AFM). Interface width, lateral correlation length, and roughness exponent were computed. Our study reveals that as doping is increased, the roughness exponent decreases and the fractal dimension increases. In all cases, the value of the roughness exponent was found to be greater than 0.5, indicating that the height fluctuations at neighboring pixels are correlated positively and exhibit persistent behavior and memory effect. Advanced fractal parameters such as lacunarity coefficient (σ), Hurst coefficient (HC), fractal succolarity (FS), and surface entropy (SE) are also calculated. Our study reveals that the surface entropy does not show any significant change, indicating a globally uniform surface. Furthermore, the local surface slope is found to play a crucial role in the performance of supercapacitive electrodes. Fractal analysis indicates that electrodes with larger fractal dimension are better for supercapacitor applications. These observations are corroborated with the 0.5 atom % Fe/Sr(OH) 2 doped sample. This sample exhibits both the highest fractal dimension and a specific capacity of 776 C g −1 at a scan rate of 5 mV s −1 . The materials with higher fractal dimension could thus be a strong candidate for the fabrication of highly efficient supercapacitors.

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Study of structural and surface morphological properties of Tb doped ZnO nanoparticles using XRD, XPS and fractal analysis

Cited by 14 publications

References 65 publications

Effect of PEIE and polylysine as interfacial layers on the performance of air-processed organic solar cells under both indoor and 1 sun conditions

Effect of PEIE and polylysine as interfacial layers on the performance of air-processed organic solar cells under both indoor and 1 sun conditions

Improved Room-Temperature Ferromagnetism in Nd-Doped SnO₂ Nanostructures through Defect Engineering

Effect of Fe Doping on the Surface Morphology and Supercapacitor Properties of Sr(OH)₂ Thin Films: A Fractal Approach

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Study of structural and surface morphological properties of Tb doped ZnO nanoparticles using XRD, XPS and fractal analysis

Cited by 14 publications

References 65 publications

Effect of PEIE and polylysine as interfacial layers on the performance of air-processed organic solar cells under both indoor and 1 sun conditions

Effect of PEIE and polylysine as interfacial layers on the performance of air-processed organic solar cells under both indoor and 1 sun conditions

Improved Room-Temperature Ferromagnetism in Nd-Doped SnO2 Nanostructures through Defect Engineering

Effect of Fe Doping on the Surface Morphology and Supercapacitor Properties of Sr(OH)2 Thin Films: A Fractal Approach

Contact Info

Product

Resources

About

Improved Room-Temperature Ferromagnetism in Nd-Doped SnO₂ Nanostructures through Defect Engineering

Effect of Fe Doping on the Surface Morphology and Supercapacitor Properties of Sr(OH)₂ Thin Films: A Fractal Approach