Photoluminescence study of Eu+3 doped ZnO nanocolumns prepared by electrodeposition method

Nouri, Abdelhak; Beniaiche, Abdelkrim; Soucase, Bernabé Marí; Guessas, Hocine; Azizi, A.

doi:10.1016/j.ijleo.2017.03.075

Cited by 24 publications

(14 citation statements)

References 24 publications

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“…The experiments were performed in aqueous solutions of Zn(NO 3 ) 2 $6H 2 O, HMTA and Eu 3þ , at a potential of À1.0 V and controlled temperature of 90 C. The electrodeposition mechanism of ZnO is shown as following [44]:…”

Section: Resultsmentioning

confidence: 99%

A theoretical and experimental investigation of Eu-doped ZnO nanorods and its application on dye sensitized solar cells

Fonseca

Siqueira

Landers

et al. 2018

Journal of Alloys and Compounds

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a b s t r a c tThis paper describes the electrodeposition of Europium-doped Zinc Oxide (ZnO) nanorods as well its application as photoanodes in dye sensitized solar cells (DSSCs). The incorporation of the Europium in the ZnO structure was evidenced by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The DSSCs based on Eu-doped nanorods photoanodes exhibits a higher conversion efficiency value (h) (0.50%) compared to the undoped photoanodes (0.34%). Mott-Schottky analysis was performed and this increase is assigned to the better electronic injection efficiency from the dye to the conduction band of Eu-doped ZnO nanorods, since the Europium incorporation in the ZnO matrix was able to down-shift its conduction band. The improvement on the DSSC performance was around 45%, showing the great potential from the practical point of view. To complement the experimental data, computational simulations were employed based on DFT framework, in order to carry out a detailed analysis of the electronic structures of these materials, as well as to provide an elucidation of its underlying physical mechanism at an atomic level.

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Section: Resultsmentioning

confidence: 99%

A theoretical and experimental investigation of Eu-doped ZnO nanorods and its application on dye sensitized solar cells

Fonseca

Siqueira

Landers

et al. 2018

Journal of Alloys and Compounds

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“…9 The Plot of (αhυ) 2 versus hυ of ZnO and various content of (1%, 3%, and 5%) Eu 3+ doped ZnO nanoparticles Figure 12 shows, emission spectra (465 nm), which comprises five emission bands at 579, 591, 617, 652 and 706 nm, credited to Eu 3+ transitions: 5 D 0 → 7 F J (J = 0, 1, 2, 3, and 4). Nouri et al [5] and Shi et al [72] have also reported such type of emission bands related to Eu 3+ ion. The first emission peak at 579 nm ( 5 D 0 → 7 F 1 ) which is related to magnetic dipole transition and its intensity hardly differs with the Eu 3+ ion bonding environment, while the peak at 591 nm ( 5 D 0 → 7 F 2 ) is an electrically permitted transition hypersensitive to the Eu 3+ ion coordinating environment.…”

Section: Pl Studiesmentioning

confidence: 86%

“…Nanostructure such as CdS, SnO 2 , TiO 2 , ZnS, ZnO, etc. 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].…”

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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“…Böylece, daha geniş bir yelpazede fiziksel özelliklere sahip olan ZnO filmlerinin uygulama alanları daha da genişlemektedir. Al, In, Cd, Sn katkılı ZnO filmleri ile ilgili çalışmalar literatürde daha eski ve oldukça fazla yer almakla beraber [9][10][11][12], La, Eu, Gd ve Er gibi nadir toprak elementleri (rareearth elements) ile katkılama daha sonraları başlamış olmasından dolayı, bu katkı elementleri ile ilgili çalışmalar literatürde daha az bulunmaktadır [13][14][15][16][17][18].…”

Section: Introductionunclassified

ZnO:Eu Filmlerinin Mikroyapısal ve Optik Özellikleri

Büyük¹,

Ilıcan²

2018

Karadeniz Fen Bilimleri Dergisi

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Evropiyum (Eu) katkılı çinko oksit (ZnO) filmleri, ucuz ve basit bir metot olan sol jel metodu ile elde edilen çözeltiler kullanılarak p-tipi silisyum (p-Si) alttaşlar üzerine spin kaplama tekniği ile büyütülmüştür. Elde edilen ZnO filminin yapısal, morfolojik ve optik özellikleri üzerine Eu katkısının etkisi, sırasıyla X-ışını kırınım cihazı, taramalı elektron mikroskobu ve uv-vis spektrofotometresi kullanılarak araştırılmıştır. Filmlerin XRD spektrumlarından, bütün filmlerin hekzagonal wurtzite zinkit (ZnO) yapıya ait olduğu ve (002) tercihli yönelime sahip olduğu belirlenmiştir. ZnO:Eu filmlerinin çekilen SEM fotoğrafları ImageJ programı ile analiz edilmiştir. Bütün filmlerin yüzeylerinin homojen ve düzgün yapıya sahip olduğu ve nanoparçacıklardan oluştuğu; yapılan Eu katkısının ZnO yüzey morfolojisinde önemli bir değişiklik olmadığı gözlenmiştir. ZnO:Eu filmlerinin diffüz yansıma spektrumları, entegre küre aparatlı UV-vis spektrofotometre yardımıyla ölçülmüştür. Bu spektrumlar kullanılarak filmlerin optik bant aralık değerleri, hem diferansiyel yansıma spektrumları hem de Kubelka-Munk fonksiyonu kullanılarak belirlenmiştir.

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Photoluminescence study of Eu+3 doped ZnO nanocolumns prepared by electrodeposition method

Cited by 24 publications

References 24 publications

A theoretical and experimental investigation of Eu-doped ZnO nanorods and its application on dye sensitized solar cells

A theoretical and experimental investigation of Eu-doped ZnO nanorods and its application on dye sensitized solar cells

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

ZnO:Eu Filmlerinin Mikroyapısal ve Optik Özellikleri

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