Influence of Pr Doping on the Structural, Morphological, Optical, Luminescent and Non-linear Optical Properties of RF-Sputtered ZnO Films

Sreedharan, R. Sreeja; Vinodkumar, R.; Navas, I.; Prabhu, Radhakrishna; Pillai, V. P. Mahadevan

doi:10.1007/s11837-015-1632-0

Cited by 11 publications

(4 citation statements)

References 78 publications

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“…The (002) peak has higher intensities for all ZnO films, which suggests a preferential orientation due to the c-axis. This is correlated with the smallest surface free energy value for the (002) plane compared to other planes, increasing the number of grains along this plane [ 67 ]. For (002), (110), and (100) planes of ZnO, the surface free energy is 9.91, 12.32, and 20.91 eV/nm 2 , respectively [ 68 ].…”

Section: Resultsmentioning

confidence: 99%

Effect of Morphology and Plasmonic on Au/ZnO Films for Efficient Photoelectrochemical Water Splitting

et al. 2021

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To improve photoelectrochemical (PEC) water splitting, various ZnO nanostructures (nanorods (NRs), nanodiscs (NDs), NRs/NDs, and ZnO NRs decorated with gold nanoparticles) have been manufactured. The pure ZnO nanostructures have been synthesized using the successive ionic-layer adsorption and reaction (SILAR) combined with the chemical bath deposition (CBD) process at various deposition times. The structural, chemical composition, nanomorphological, and optical characteristics have been examined by various techniques. The SEM analysis shows that by varying the deposition time of CBD from 2 to 12 h, the morphology of ZnO nanostructures changed from NRs to NDs. All samples exhibit hexagonal phase wurtzite ZnO with polycrystalline nature and preferred orientation alongside (002). The crystallite size along (002) decreased from approximately 79 to 77 nm as deposition time increased from 2 to 12 h. The bandgap of ZnO NRs was tuned from 3.19 to 2.07 eV after optimizing the DC sputtering time of gold to 4 min. Via regulated time-dependent ZnO growth and Au sputtering time, the PEC performance of the nanostructures was optimized. Among the studied ZnO nanostructures, the highest photocurrent density (Jph) was obtained for the 2 h ZnO NRs. As compared with ZnO NRs, the Jph (7.7 mA/cm2) of 4 min Au/ZnO NRs is around 50 times greater. The maximum values of both IPCE and ABPE are 14.2% and 2.05% at 490 nm, which is closed to surface plasmon absorption for Au NPs. There are several essential approaches to improve PEC efficiency by including Au NPs into ZnO NRs, including increasing visible light absorption and minority carrier absorption, boosting photochemical stability, and accelerating electron transport from ZnO NRs to electrolyte carriers.

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Section: Resultsmentioning

confidence: 99%

Effect of Morphology and Plasmonic on Au/ZnO Films for Efficient Photoelectrochemical Water Splitting

et al. 2021

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“…The unique 4f-4f transitions of rare earth ions have the capability to generate distant emission bands spanning various wavelengths, ranging from ultraviolet to the far infrared region and there is a literature available on the optoelectronic characteristics of rare-earth doped ZnO. A study done by R. Sreeja Sreedharan et al [13] delved into the detailed examination of the structural, morphological, and optical properties of ZnO doped with Praseodymium (Pr). Optical Spectroscopic analysis revealed that incorporation of Pr led to an enhancement in film transparency and an intriguing shift in the non-linear absorption behavior was identified; as the concentration of Pr doping increased, the transition shifted from saturable absorption to reverse saturable absorption.…”

Section: Introductionmentioning

confidence: 99%

Exploration of the optical characteristics in sol-gel synthesized europium-doped zinc oxide thin films for potential optoelectronic use: a comprehensive characterization approach

Tahir,

Bujran,

Want

2024

Phys. Scr.

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In this study, we present our findings on the spin coating deposition of Zinc-Oxide (ZnO) nanowire arrays and Europium doped ZnO (Eu3+: ZnO) nanostructure thin films. These arrays were grown on soda lime (silica) coated glass substrate. We conducted a comprehensive analysis of the structural and optical properties of the as-synthesized nanostructures. Our characterization techniques included X-ray diffraction, FESEM, Raman spectroscopy, and photoluminescence. The XRD results indicate the incorporation of Europium (Eu3+) ions into the crystalline lattice, possibly substituting Zn2+ ions. The incorporation of Europium (Eu3+) doping resulted in decreased crystalline size determined by Scherrer’s equation, decreasing from 48.0 nm to 28 nm demonstrates a decrease in defects within the films. We have thoroughly examined the optical characteristics of both Europium-doped and pure ZnO thin films through a systematic study. The optical properties were assessed by analyzing the absorption spectra within the wavelength range of 200 to 2000 nm. The film exhibits an impressive 80% transparency, particularly noteworthy for window layer application. The incorporation of Eu3+ into host matrix also led to a reduction in the optical bandgap Raman Shift analysis further substantiated the alterations in the optical properties of the films. Upon the inclusion of Eu3+a distinct 5D0–7F2 transition originating from the Eu3+ ions, occurring at approximately 612 nm was detected. The refractive index(n), extinction coefficient (k) and all other associated parameters were found to be impacted by the addition of Europium (Eu3+) to ZnO thin films. The refractive index dispersion relation has been explored using a single oscillator model. Furthermore, the non-linear optical susceptibility (ᵪ) and non-linear refractive index were considered using semi-empirical relationships based on the linear optical parameters. The Europium (Eu3+) doping in ZnO leads to an increase in the ᵪ3 value, elevating it from 1.26*10-11 to 1.34 *10-11 e.s.u. These findings indicate the potential for Eu-doped ZnO nanostructures to serve as a promising platform for the development of efficient multispectral light-emitting diodes (LEDs) and optical devices.

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“…sıklıkla kullanılan önemli bir malzemedir. Nadir toprak metalleri, spektrumun görünür aralığında uzun ömürlülüğü ve 4f kabuk içi geçişlerden kaynaklanan dar ve yoğun emisyon hatları nedeniyle katkı maddeleri olarak seçilirler [1]. Bu nedenle, Ln 3+ :Pr, Eu, Er,Yb…v.b.…”

Section: Introductionunclassified

“…Genel olarak yarı iletken malzeme sistemlerinin elektriksel ve optik özelliklerinin iyileştirilmesinde, bazı Lantanit elementlerinin katkılanmasının yanı sıra sentez yöntemleri de önemli bir rol oynamaktadır. Şimdiye kadar bahsettiğimiz Pr 3+ katkılı ZnO yarıiletken malzemeler; sol-jel [19,28], çökeltme [17], nebulizatör sprey tekniği [29], katı hal sentezi [30], basit sonokimyasal metot [31], magnetron püskürtme tekniği [1] gibi farklı yöntemlerle sentezlenmiştir. Bu yöntemler arasında hidrotermal yöntem ile sentezleme tekniği; verimli, düşük maliyetli, çevre açısından güvenli, düşük reaksiyon sıcaklığı ve katkı maddesi konsantrasyonu ile büyüme parametrelerinin kolay kontrolü gibi nedenlerden dolayı çokça kullanılmaktadır.…”

Section: Introductionunclassified

Pr3+ Katkılı ZnO Nanoparçacıkların Hidrotermal Yöntemle Sentezi ve Karakterizasyonu

Şenol

Imamoğlu

2021

Düzce Üniversitesi Bilim Ve Teknoloji Dergisi

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Bu çalışmada Praseodimyum(Pr 3+ ) katkılı .01,0.02,0.03,0.04,0.05)] nanoparçacıklar kolay, hızlı ve verimli bir yöntem olan hidrotermal yöntem ile sentezlenmiştir. Sentezlenen nanoparçacıkların, kristal yapıları X-ışını kırınımıyla (XRD), yüzey morfolojileri taramalı elektron mikroskobu (SEM) ve enerji dağıtıcı X-ışını dağılımlarıyla (EDX), optik özellikleri ise dağılma yansıma (DRS UV-VIS) spektroskopisi kullanılarak karakterize edilmiştir. XRD karakterizasyonunda tüm Pr 3+ katkılı ZnO örneklerinin hekzagonal (wurzite) yapıda oluştuğu, praseodimyum veya praseodimyumoksit'e ait herhangi bir kırınım pikinin oluşmadığı gözlemlenmiştir. SEM görüntülerinden ZnO'in kristal yapısında Pr konsantrasyonu arttıkça daha yoğun ve daha kompakt halde olduğu görülmüştür. EDX sonuçlarından ise, sentezlenen örneklerin bileşiminde Zn, O ve Pr piklerinin varlığı tespit edilmiştir. Tüm numunelerin optik ölçümlerinden enerji bant aralıkları hesaplanmış ve hesaplanan enerji bant aralığı değerlerinin, praseodimyum konsantrasyonu ile arttığı görülmüştür.

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Influence of Pr Doping on the Structural, Morphological, Optical, Luminescent and Non-linear Optical Properties of RF-Sputtered ZnO Films

Cited by 11 publications

References 78 publications

Effect of Morphology and Plasmonic on Au/ZnO Films for Efficient Photoelectrochemical Water Splitting

Effect of Morphology and Plasmonic on Au/ZnO Films for Efficient Photoelectrochemical Water Splitting

Exploration of the optical characteristics in sol-gel synthesized europium-doped zinc oxide thin films for potential optoelectronic use: a comprehensive characterization approach

Pr3+ Katkılı ZnO Nanoparçacıkların Hidrotermal Yöntemle Sentezi ve Karakterizasyonu

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