Performance of Eu2O3 coated ZnO nanoparticles-based DSSC

Kaur, Manveen; Verma, N. K.

doi:10.1007/s10854-013-1293-0

Cited by 11 publications

(5 citation statements)

References 22 publications

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“…Zinc oxide is a stable wide band gap semiconductor of low toxicity and cost, with many attractive physical properties and providing great possibilities to achieve novel or enhanced properties through doping. − It is studied for a wide range of applications including piezo-actuators, nanolasers, optoelectronics, − solar cells, − photoassisted cleaning of water and gases, water splitting for solar fuels, − catalysis for fuel synthesis, − batteries, ,− and sensors. ,,− Doping with d- and f-element ions is investigated with the aim to introduce new band gap states, changed electronic structure, and magnetic and catalytic centers to achieve energy up- and downconversion in solar cells, optoelectronics, sensors, piezo-optics and bioprobes, magnetic semiconductors, and redox-based catalysis. ,− Many of these applications may take advantage of the special properties of the 4f lanthanide (Ln) series ions, including narrow absorption and emission bands, due to the largely shielded and thereby, from ligand field symmetry fairly unaffected 4f electrons. When considering Ln doping, it is seen that the Ln 3+ ions are alio-valent and large, compared to the Zn 2+ ions present in the hexagonal ZnO .…”

Section: Introductionmentioning

confidence: 99%

Fast, Low-Cost Synthesis of ZnO:Eu Nanosponges and the Nature of Ln Doping in ZnO

et al. 2020

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A low-cost template-free solution chemical route to highly porous nanocrystalline sponges of ZnO-EuO 1.5 with 0−5 mol % Eu is presented. The process uses Zn− and Eu−acetate− nitrate and triethanolamine as precursors in methanol. After evaporation of the solvent and heating at 200 °C for 3 min, crystalline ZnO:Eu sponges with minor amounts of organic residues were obtained. Heating to 400 °C replaced the organics with carbonate, which in its turn was decomposed at temperatures below 600 °C, forming ZnO:Eu sponges. Samples heated to 200− 1000 °C for 3 min were studied with XRD, SEM, TEM, TG, XPS, and IR spectroscopy. The ZnO:Eu crystallite sizes could be tuned from below 10 nm for sponges prepared at 200−500 °C, to over 100 nm range at 900 °C, without sintering of the overall microstructure. XRD showed the presence of hexagonal ZnO:Eu (or at 700−1000 °C, ZnO:Eu and cubic Eu 2 O 3 ) as the only phases present. The ZnO:Eu had slightly larger unit cell dimensions than the literature value of ZnO for samples obtained at 200−600 °C, while the unit cells of samples obtained at higher temperatures were quite close to the value of undoped ZnO. XPS showed that Eu was mainly in its 3+ state and well-distributed within the sponges but segregated at the ZnO sponge surface upon heating at 700− 1000 °C, in accordance with XRD studies showing Eu 2 O 3 formation.

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Section: Introductionmentioning

confidence: 99%

Fast, Low-Cost Synthesis of ZnO:Eu Nanosponges and the Nature of Ln Doping in ZnO

et al. 2020

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“…with particular morphologies has drawn growing attention in the latest years due to their technological applications and unique optical characteristics [1][2][3][4][5]. Zinc oxide (ZnO) is a versatility of the II-VI direct band gap semiconductor with a large 3.37 eV band gap with a large 60 meV excitonic binding energy [6][7][8][9]. The band gap and optical characteristics of ZnO nanostructure can be customized by altering the shape and size of the particles and by doping ZnO structures with separate components.…”

Section: Introductionmentioning

confidence: 99%

Bright red luminescence emission of macroporous honeycomb-like Eu3+ ion-doped ZnO nanoparticles developed by gel-combustion technique

Naik

Viswanath

et al. 2020

SN Appl. Sci.

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The impact of europium (Eu 3+) ion doping has been outlined in improving the structure and optical properties of macroporous honeycomb-like zinc oxide (ZnO) nanoparticles, produced by the gel-combustion technique by changing the quantity of dopant. The X-ray diffraction (XRD) research verified that the hexagonal wurtzite structure of ZnO was not disturbed by Eu 3+ substitution. Scherrer method, Scherrer plots (SP), Williamson-Hall (W-H) plots and Size-Strain plots (SSP) were used to estimate the crystallite size. Decreased crystallite size in ZnO:Eu 3+ was noticed along with lower angle shift of XRD peaks and increased lattice parameters such as unit cell volume that can be described as replacement result of Eu 3+ at Zn sites. Fourier transform infrared (FTIR) spectroscopy analysis confirmed the Eu 3+ dopant by moving the peak from 474 cm −1 to 525 cm −1. Field-emission scanning electron microscopy (FESEM) pictures verified macroporous honeycomb-like structures. UV-Visible (UV-Vis) absorption spectroscopic studies show that the ability of ZnO:Eu 3+ nanoparticles concerning the absorption of visible light increased upon Eu 3+ doping with a red shift compared to ZnO nanoparticles. Photoluminescence (PL) emission spectra of Eu 3+ doped ZnO nanoparticles exhibited five intense band emissions at 579, 591, 617, 652, and 706 nm ascribed to 5

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“…In spite of the pervading curiosity in various semiconductors, zinc-oxide (ZnO) remains a promising choice and has drawn intensified attention in recent years owing to its unique and distant optical characteristics [1][2][3]. ZnO, an II-VI semiconductor has a bandgap equal to 3.37 eV (direct) with an excitonic binding energy of 60 meV is an acclaimed material which form a wide variety of nanostructures with fundamentally interesting and technologically applicable properties [4][5][6]. It is widely recognized that the issue of water pollution stemming from human-induced industrial activities presents a significant challenge that must be addressed by humanity in the 21st century [7].…”

Section: Introductionmentioning

confidence: 99%

“…In the last twenty years, research has prominently focused on the incorporation of rare earth (RE) or lanthanide elements through doping. The distinctive characteristics of lanthanides stem from the shielding effect exerted by the complete 5p 6 5 s 2 sub-shell on the 4 f orbitals, enabling electronic transitions within f-f and f-d orbitals, extending from the ultraviolet (UV) to the visible spectrum [17,18]. The electron shielding provided by the 4 f orbitals ensures a notable insensitivity to the nearby atomic environment, leading to negligible disturbances during such transitions.…”

Section: Introductionmentioning

confidence: 99%

Is 3% Eu³⁺ doping in ZnO unique? An investigative case study of photocatalytic descriptors using multiparameter approach

Tahir,

Jan,

Irshad

et al. 2024

Phys. Scr.

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The hydrothermal approach was used to prepare different proportions of Europium (Eu3+) doped ZnO hybrid material which were characterized by powder X-ray diffraction (PXRD), Scanning electron microscopy (SEM) analysis with end results being Eu3+: ZnO nanocomposites. The XRD pattern obtained verifies the successful incorporation of Europium (Eu3+) into Zinc-Oxide (ZnO) host matrix. SEM analysis predicted that the ZnO was uniformly distributed and agglomeration was observed to be increased with increasing wt.% of Eu3+. The photocatalytic activity was carried out using the antibiotic Rifampicin under visible light and the observed results predicted the highest photocatalytic activity against the antibiotic for Eu3+: ZnO-3 wt.%. Rifampicin had a 90-minute degradation rate of around 90% for Eu3+: ZnO -3 wt.% which demonstrated that doping ZnO with Eu3+ allows a favorable adsorption with enhanced photocatalytic properties. When considering the collective findings of Electrochemical Impedance Spectroscopy (EIS), Photocurrent Measurements and UV-visible spectroscopy data, a unanimous inference can be drawn: the peak photocatalytic efficiency of Eu3+ doped ZnO aligns with a 3% wt. concentration of Europium (Eu3+).

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Performance of Eu2O3 coated ZnO nanoparticles-based DSSC

Cited by 11 publications

References 22 publications

Fast, Low-Cost Synthesis of ZnO:Eu Nanosponges and the Nature of Ln Doping in ZnO

Fast, Low-Cost Synthesis of ZnO:Eu Nanosponges and the Nature of Ln Doping in ZnO

Bright red luminescence emission of macroporous honeycomb-like Eu3+ ion-doped ZnO nanoparticles developed by gel-combustion technique

Is 3% Eu³⁺ doping in ZnO unique? An investigative case study of photocatalytic descriptors using multiparameter approach

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Performance of Eu2O3 coated ZnO nanoparticles-based DSSC

Cited by 11 publications

References 22 publications

Fast, Low-Cost Synthesis of ZnO:Eu Nanosponges and the Nature of Ln Doping in ZnO

Fast, Low-Cost Synthesis of ZnO:Eu Nanosponges and the Nature of Ln Doping in ZnO

Bright red luminescence emission of macroporous honeycomb-like Eu3+ ion-doped ZnO nanoparticles developed by gel-combustion technique

Is 3% Eu3+ doping in ZnO unique? An investigative case study of photocatalytic descriptors using multiparameter approach

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Is 3% Eu³⁺ doping in ZnO unique? An investigative case study of photocatalytic descriptors using multiparameter approach