The influence of growth temperature on structural and optical properties of sputtered ZnO QDs embedded in SiO 2 matrix

Samavati, Alireza; Othaman, Zulkafli; Ghoshal, Sib Krishna; Mustafa, Mohd Kamarulzaki

doi:10.1016/j.spmi.2015.07.026

Cited by 18 publications

(4 citation statements)

References 25 publications

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“…These methods are described in our recent study. 30 For the ZnO-SiO 2 interface, the Zn atoms are bound with two O atoms. However, the O-atoms of down sites are not able to bind with Zn atoms and instead defect sites can be created in the boundary between the SiO 2 and ZnO.…”

Section: Resultsmentioning

confidence: 99%

Structural, optical and electrical evolution of Al and Ga co-doped ZnO/SiO₂/glass thin film: role of laser power density

Samavati

Ismail

et al. 2017

RSC Adv.

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Section: Resultsmentioning

confidence: 99%

Structural, optical and electrical evolution of Al and Ga co-doped ZnO/SiO₂/glass thin film: role of laser power density

Samavati

Ismail

et al. 2017

RSC Adv.

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“…The XRD patterns in Figure 3 illustrate the different configurations of ZnO deposited on ITO/glass substrate by the electroless deposition method. The XRD signals are matched with JCPDS number of 36-1451 associated to the hexagonal structure of the wurtzite ZnO [33].…”

Section: Device Morphology and Structurementioning

confidence: 97%

Enhancement of organic solar cell efficiency by altering the zinc oxide photoanode nanostructure morphology

Samavati

Ismail

et al. 2021

J Nanostruct Chem

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The current paper examines the effects of zinc oxide nanostructure configurations, as photoanode formations of organic solar cells, on the performance of power conversion. To this end, some experiments were conducted during which a near band edge emission red shift of ~0.11 eV from nanoparticles to vertically-oriented nanorods was observed. This bandgap narrowing promotes transferring of photo-excited electrons towards the conduction band of photoanode. A ~48% decrease in the deep level emission intensity revealed a smaller nonradiative waves emission due to lower level of crystal disorder. By using vertically-oriented zinc oxide nanorods as photoanodes, the photovoltaic efficiency of the organic solar cell improved considerably. The nanorod-structured photoanodes showed a 0.22 V rise in the open-circuit voltage, from 0.76 V to 0.98 V, and a 2.08 times increment in the overall conversion performance, compared to the zinc oxide nanoparticle-structured photoanodes. This superior performance is attributed to a greater chance of charge recombination and light-trapping in the cells, more efficient light absorption, and high level of crystallinity that grants easier electron mobility for vertically-oriented zinc oxide nanorods. Moreover, a smaller electron transfer impedance (0.85 ) was achieved due to better electrocatalytic action for oxygen reduction for vertical nanorods compared to the other two zinc oxide configurations (1.62  and 5.06 ). This boosted the cell performance by increasing the short-circuit current density (JSC). The fabricated solar cell may contribute to sustainable and environmentally-friendly electricity generation process through reducing the consumption of nonrenewable energy sources.

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“…The photoluminescence spectrum of the ZnO/graphene thin films is set out in detail in Figure 4b. It was observed that a weak violet emission takes place near 414 nm due to ZnO interstices [21,22] whereas the strong blue emission was found around 463 nm due to O vacancies [23,24]. The weak peak of green emission was observed at 553 nm possibly caused by the transition of electrons from the lower part of the conduction band to the anti-O-Zn site level defect [25].…”

Section: Introductionmentioning

confidence: 99%

Photoluminescence of Sol-Gel Synthesized ZnO Nanostructures

Hernández

Millán

Torres

et al. 2021

KEM

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Zinc oxide nanostructures have potentially interesting optical properties, which make them candidates for use in applications within the area of optoelectronics; their synthesis can be carried out through low-cost methods, such as sol gel, among many others. In addition, depending on the synthesis method, its shape and size, ZnO nanostructures can present emissions in the ultraviolet (UV) and visible region. By doping with elements such as carbon, silver, copper or some rare earth, for example, erbium, terbium or neodymium, the optical properties of ZnO can be adjusted and controlled to be able to be applied in the production of biosensors, photodetectors and even sensors of white light. In this research work, a review is presented on the nature of the optical transition mechanisms that occur in the ZnO nanostructures synthesized by the sol-gel method.

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The influence of growth temperature on structural and optical properties of sputtered ZnO QDs embedded in SiO 2 matrix

Cited by 18 publications

References 25 publications

Structural, optical and electrical evolution of Al and Ga co-doped ZnO/SiO₂/glass thin film: role of laser power density

Structural, optical and electrical evolution of Al and Ga co-doped ZnO/SiO₂/glass thin film: role of laser power density

Enhancement of organic solar cell efficiency by altering the zinc oxide photoanode nanostructure morphology

Photoluminescence of Sol-Gel Synthesized ZnO Nanostructures

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The influence of growth temperature on structural and optical properties of sputtered ZnO QDs embedded in SiO 2 matrix

Cited by 18 publications

References 25 publications

Structural, optical and electrical evolution of Al and Ga co-doped ZnO/SiO2/glass thin film: role of laser power density

Structural, optical and electrical evolution of Al and Ga co-doped ZnO/SiO2/glass thin film: role of laser power density

Enhancement of organic solar cell efficiency by altering the zinc oxide photoanode nanostructure morphology

Photoluminescence of Sol-Gel Synthesized ZnO Nanostructures

Contact Info

Product

Resources

About

Structural, optical and electrical evolution of Al and Ga co-doped ZnO/SiO₂/glass thin film: role of laser power density

Structural, optical and electrical evolution of Al and Ga co-doped ZnO/SiO₂/glass thin film: role of laser power density