The fabrication of zinc oxide nanorods and nanowires by solgel immersion methods

Ameer, A. A.; Suriani, A. B.; Jabur, Akram R.; Hashim, Norhayati; Fatiatun,; Zaid, K

doi:10.1088/1742-6596/1170/1/012005

Cited by 7 publications

(6 citation statements)

References 29 publications

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“…As mentioned before, a wide diversity of different nanostructure morphologies can be achieved with ZnO using chemical or physical methods including thermal evaporation [ 11 ], chemical vapor deposition (CVD) [ 12 , 13 ], sol-gel method [ 14 ], hydrothermal [ 15 ], molecular beam epitaxy (MBE) [ 16 ], metalorganic vapor-phase epitaxy (MOVPE) [ 17 ], and solvothermal growth [ 18 ]. Among the most reported ZnO nanostructures are zero dimensional systems 0D (nanoparticles NPs [ 19 ]), one-dimensional (1D; nanowires NWs [ 20 ], nanorods NRs [ 21 ], nanotubes NTs [ 22 ]), two-dimensional (2D; nanobelts [ 23 ], thin films [ 24 ]), and more complex morphologies such as nanohelix [ 25 ], nanorings [ 26 ], nanocages [ 27 ], nanoflowers [ 28 ], or comb-like structures [ 29 ].…”

Section: Introductionmentioning

confidence: 99%

Photoluminescence of ZnO Nanowires: A Review

et al. 2020

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One-dimensional ZnO nanostructures (nanowires/nanorods) are attractive materials for applications such as gas sensors, biosensors, solar cells, and photocatalysts. This is due to the relatively easy production process of these kinds of nanostructures with excellent charge carrier transport properties and high crystalline quality. In this work, we review the photoluminescence (PL) properties of single and collective ZnO nanowires and nanorods. As different growth techniques were obtained for the presented samples, a brief review of two popular growth methods, vapor-liquid-solid (VLS) and hydrothermal, is shown. Then, a discussion of the emission process and characteristics of the near-band edge excitonic emission (NBE) and deep-level emission (DLE) bands is presented. Their respective contribution to the total emission of the nanostructure is discussed using the spatial information distribution obtained by scanning transmission electron microscopy−cathodoluminescence (STEM-CL) measurements. Also, the influence of surface effects on the photoluminescence of ZnO nanowires, as well as the temperature dependence, is briefly discussed for both ultraviolet and visible emissions. Finally, we present a discussion of the size reduction effects of the two main photoluminescent bands of ZnO. For a wide emission (near ultra-violet and visible), which has sometimes been attributed to different origins, we present a summary of the different native point defects or trap centers in ZnO as a cause for the different deep-level emission bands.

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Section: Introductionmentioning

confidence: 99%

Photoluminescence of ZnO Nanowires: A Review

et al. 2020

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“…Besides TiO2, the ZnO was also used as photoanode due to wide band gap energy [5] and higher electron mobility than TiO2 [67]. The ZnO presented superior electron mobility that enabled faster transport of photo injection electrons [69].…”

Section: Effect Of Zno and Tio2 Layer In The Photoanode Propertiesmentioning

confidence: 99%

Effects of Various Semiconducting Oxides as Photoanode and Counter Electrode for Dye Sensitized Solar Cell Application - A Review

Fatiatun

Bakar

Marwoto

et al. 2020

Indonesian J Appl Phys

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Dye sensitized solar cells (DSSCs) merupakan teknologi alternatif fotovoltaik yang menguntungkan. DSSCs menunjukkan harga yang murah, efisiensi yang tinggi dan proses pembuatan yang sederhana. Dalam aplikasi DSSCs, fotoanoda memiliki peranan yang penting untuk mengumpulkan elektron-elektron yang tereksitasi dan dye berfungsi untuk menyalurkan cahaya elektron-elektron ke transparent conducting film (TCF). Fotoanoda mempunyai band gap yang lebar pada semikonduktor logam oksida (contoh: zinc oxide (ZnO) dan titanium dioxide (TiO2)) yang dilapiskan pada TCF. Counter electrode (CE) adalah salah satu komponen yang penting dalam proses kerja DSSCs. CE digunakan sebagai mediator untuk membangkitkan sensitizer setelah masuknya elektron. Bahan CE yang ideal harus mempunyai resistansi yang rendah, biaya produksi yang murah, konduktivitas listrik yang tinggi, aktivitas elektrokatalitik yang bagus dan stabilitas yang tinggi. Bahan-bahan CE yang umum digunakan untuk aplikasi DSSCs yaitu seperti platina (Pt), karbon, carbon nanotubes (CNTs), grafin dan polimer konduktif. Review ini dikembangkan untuk mempelajari sifat-sifat bahan fotoanoda dan CE yang bagus untuk aplikasi DSSCs. Review ini juga digunakan untuk memberikan informasi untuk perkembangan bahan-bahan fotoanoda dan CE pada penelitian selanjutnya dalam aplikasi DSSCs. Dalam review ini, pengaruh bahan-bahan yang digunakan untuk fotoanoda dan CE dalam aplikasi DSSCs didiskusikan.

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“…Wet chemical synthesis is carried out at low temperatures (˂200 °C) either in aqueous solution, organic solution or a mixture of both. It includes hydrothermal [ 23 , 32 , 33 , 41 , 43 , 44 , 45 , 46 , 47 , 48 ], sol-gel [ 19 , 49 , 50 , 51 ], solvothermal [ 52 ], ultrasonic irradiation growth in solution [ 41 ] and spray pyrolysis [ 28 , 53 ]. Solid-state synthesis includes microwave irradiation [ 41 , 42 ] and carbothermal reduction [ 13 , 42 ].…”

Section: Introductionmentioning

confidence: 99%

Economic Friendly ZnO-Based UV Sensors Using Hydrothermal Growth: A Review

et al. 2021

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Ultraviolet (UV) sensors offer significant advantages in human health protection and environmental pollution monitoring. Amongst various materials for UV sensors, the zinc oxide (ZnO) nanostructure is considered as one of the most promising candidates due to its incredible electrical, optical, biomedical, energetic and preparing properties. Compared to other fabricating techniques, hydrothermal synthesis has been proven to show special advantages such as economic cost, low-temperature process and excellent and high-yield production. Here, we summarize the latest progress in research about the hydrothermal synthesis of ZnO nanostructures for UV sensing. We particularly focus on the selective hydrothermal processes and reveal the effect of key factors/parameters on ZnO architectures, such as the laser power source, temperature, growth time, precursor, seeding solution and bases. Furthermore, ZnO hydrothermal nanostructures for UV applications as well as their mechanisms are also summarized. This review will therefore enlighten future ideas of low-temperature and low-cost ZnO-based UV sensors.

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The fabrication of zinc oxide nanorods and nanowires by solgel immersion methods

Cited by 7 publications

References 29 publications

Photoluminescence of ZnO Nanowires: A Review

Photoluminescence of ZnO Nanowires: A Review

Effects of Various Semiconducting Oxides as Photoanode and Counter Electrode for Dye Sensitized Solar Cell Application - A Review

Economic Friendly ZnO-Based UV Sensors Using Hydrothermal Growth: A Review

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