Effect of temperature on hydrothermally grown high-quality single-crystals Mg-doped ZnO nanorods for light-emitting diode application

Azzez, Shrook A.; Hassan, Z.; Hassan, J.J.; Mukhlif, M.S.; Mahdi, Mohamed S.; Bououdina, M.

doi:10.1016/j.jlumin.2017.07.050

Cited by 23 publications

(14 citation statements)

References 72 publications

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“…The lattice strain ( ε ) was used to measure the distribution of lattice constants arising from crystal imperfections in film, such as defects and lattice dislocations [ 40 ], and it was estimated by the equation [ 47 ]:

…”

Section: Resultsmentioning

confidence: 99%

“…Doping with metal ions such as Cd, Cu, Fe, Er, Mg, and Mn is generally used to adjust the conductivity of ZnO to meet different application requirements [ 35 , 36 , 37 , 38 , 39 ]. Due to the similar radius of Mg 2+ (0.57 Å) to that of Zn 2+ (0.60 Å), it was easy to integrate into ZnO lattices through substitution [ 40 ]. This means that no phase transformations or lattice distortions will occur due to replacing Zn with Mg.…”

Section: Introductionmentioning

confidence: 99%

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Highly Sensitive Magnesium-Doped ZnO Nanorod pH Sensors Based on Electrolyte–Insulator–Semiconductor (EIS) Sensors

Al-Khalqi

Hamid

Al-Hardan

et al. 2021

Sensors

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For highly sensitive pH sensing, an electrolyte insulator semiconductor (EIS) device, based on ZnO nanorod-sensing membrane layers doped with magnesium, was proposed. ZnO nanorod samples prepared via a hydrothermal process with different Mg molar ratios (0–5%) were characterized to explore the impact of magnesium content on the structural and optical characteristics and sensing performance by X-ray diffraction analysis (XRD), atomic force microscopy (AFM), and photoluminescence (PL). The results indicated that the ZnO nanorods doped with 3% Mg had a high hydrogen ion sensitivity (83.77 mV/pH), linearity (96.06%), hysteresis (3 mV), and drift (0.218 mV/h) due to the improved crystalline quality and the surface hydroxyl group role of ZnO. In addition, the detection characteristics varied with the doping concentration and were suitable for developing biomedical detection applications with different detection elements.

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…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Highly Sensitive Magnesium-Doped ZnO Nanorod pH Sensors Based on Electrolyte–Insulator–Semiconductor (EIS) Sensors

Al-Khalqi

Hamid

Al-Hardan

et al. 2021

Sensors

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show abstract

“…The band gap energy (E g ) of ZnO and copper doped ZnO was estimated by using Kubelka-Munk method [43][44][45][46]. It promotes the transformation of the measure diffuse re ectance and the extraction of E g value with best accuracy.…”

Section: Effect Of Milling Time On Optical Energy Band Gap (E G )mentioning

confidence: 99%

Effect of Milling Time, Doping Concentration and Temperature on the Structural, Microstructural and Optical Properties of Cu Doped ZnO Nanoceramics

Das

Parashar

et al. 2020

Preprint

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In this work, high energy ball milling (HEBM) technique has been employed to successfully synthesize a series of Cu-doped ZnO nanoceramics (Zn 1-x Cu x O) with Cu concentration x = 0, 0.01, 0.02, 0.03 and 0.04. The synthesized nanoceramic was analysed by XRD, FESEM, TEM, Uv-Vis-DRS. The structural, microstructural and optical properties of the synthesized sample with different duration of milling, doping concentration and temperature has been investigated. X-ray diffraction result indicates that the samples are wurtzite structure with single phase. A decrease in peak intensity was observed with increase in milling time. 10h milled Cu doped ZnO sample shows single phase. After calcination at 900 ºC in x = 0.04 few peaks related to CuO was observed indicating the solubility limit of Cu in ZnO is 3 atomic%. With increase in milling time crystallite decreases where as strain increases however after calcination crystallite increases where as strain decreases. After calcination peak intensity increases. The specific surface area of ZnO increases after Cu doping but decreases after calcination. Bond length decreases after calcination but lattice distortion increases. FESEM micrograph shows particle growth after calcination. The average particle size decreases with increase in Cu concentration(30 nm to 20 nm) whereas increases after calcination and sintering (488 nm-2706 nm).The band gap decreases with increasing in milling time also with increase in Cu concentration and after calcination. Cu doping in ZnO shows red shift indicating Cu doped ZnO samples are suitable for optoelectronic device applications.

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“…Salah satu material semikonduktor oksida yang menarik banyak perhatian para peneliti saat ini adalah seng oksida (zinc oxide, ZnO) karena material ini memiliki sifat-sifat yang unik seperti energi celah pita (band gap energy) yang lebar sebesar 3,37 eV, mempunyai emisi ultraviolet yang kuat pada temperatur ruang karena memiliki energi ikatan elektron yang tinggi energi sebesar 60 meV, sehingga material tersebut banyak diaplikasikan pada teknologi terkini seperti laser semikonduktor UV biru, dioda pemancar cahaya, fotokatalis, pemanas transparan dan divais optoelektronik lainnya [1]- [3]. Sifat lain yang dimiliki oleh ZnO adalah biokompatibilitas, tingkat toksisitas yang rendah, mobilitas elektron yang tinggi, mudah untuk difabrikasi dan memiliki stabilitas kimia yang baik.…”

Section: Pendahuluanunclassified

Pengaruh Perlakuan Hidrotermal Terhadap Morfologi, Sifat Optik Dan Sifat Listrik Lapisan Tipis Nanorods Zno

Suhaimi¹

2020

metal.

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Zinc oxide nanorods (ZnO NRs) is a semiconductor material that has been widely applied in various fields. In this research, ZnO NRs were successfully grown on ITO substrates by chemichal bath deposition (CBD) method. The process begins with making a seed solution using an ecimolar mixture of Zn-Nitrate and hexamethylentetramine (HMTA) at 00C for one hour with 0.015 M concentration. Furthermore, making a layer of seeds using spin coating technique. ZnO NRs were grown using the CBD method at 900C for three hours then treated with variations which are hydrothermal method treatment and non-hydrothermal method treatment at 1500C for three hours. Samples were given characterization treatment using SEM, XRD, UV-Vis and four-point probe. SEM results showed that hydrothermal treatment was able to increase the coverage of nanorods on the substrate to be more prevelently and was able to increase the vertical structure of the nanorods. The results of XRD analysis showed that samples given hydrothermal treatment experienced an increase in the crystallite size. The amount of crystallite size in the sample treated with variation of non-hydrothermal treatment and hydrothermal treatment was 71, 198 and 165.696 nm. Hydrothermal treatment of nanorods samples decreased the sample diameter from 288,252 nm to 125,824 nm. The transmittance value of the samples decreased in the presence of hydrothermal treatment which is 56.53% to 38.67%. The hydrothermal treatment was able to reduce the energy bandgap (Eg) of the sample, while the sample of non-hydrothermal treatment showed value of the Eg was 3.22 eV. Meanwhile, the value of Eg after hydrothermal treatment was 3.17 eV. The resistivity value of ZnO NRs with hydrothermal treatment was 0.833 x 10-4 Ωcm, while the resistivity value of non-hydrothermal treatment was 1.126 x 10-4 Ωcm. Key words: zinc-oxide nanorods, chemical bath deposition, hydro-thermal

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Effect of temperature on hydrothermally grown high-quality single-crystals Mg-doped ZnO nanorods for light-emitting diode application

Cited by 23 publications

References 72 publications

Highly Sensitive Magnesium-Doped ZnO Nanorod pH Sensors Based on Electrolyte–Insulator–Semiconductor (EIS) Sensors

Highly Sensitive Magnesium-Doped ZnO Nanorod pH Sensors Based on Electrolyte–Insulator–Semiconductor (EIS) Sensors

Effect of Milling Time, Doping Concentration and Temperature on the Structural, Microstructural and Optical Properties of Cu Doped ZnO Nanoceramics

Pengaruh Perlakuan Hidrotermal Terhadap Morfologi, Sifat Optik Dan Sifat Listrik Lapisan Tipis Nanorods Zno

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