Electro‐optical and cathodoluminescence properties of low temperature grown ZnO nanorods/p‐GaN white light emitting diodes

Kishwar, S.; Hasan, Kamran ul; Tzamalis, Georgios; Nur, Omer; Willander, Magnus; Kwack, Ho-Sang; Dang, Daniel Le Si

doi:10.1002/pssa.200925393

Cited by 38 publications

(29 citation statements)

References 27 publications

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“…The physical origin of the electroluminescence has been extensively studied but is still under debate [373][374][375]. There has also been a controversy about whether the emission is from the n-ZnO side [147,376] or the p-GaN side [372,377].…”

Section: Inorganic Heterojunction Ledsmentioning

confidence: 99%

One-dimensional ZnO nanostructures: Solution growth and functional properties

2011

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One-dimensional (1D) ZnO nanostructures have been studied intensively and extensively over the last decade not only for their remarkable chemical and physical properties, but also for their current and future diverse technological applications. This article gives a comprehensive overview of the progress that has been made within the context of 1D ZnO nanostructures synthesized via wet chemical methods. We will cover the synthetic methodologies and corresponding growth mechanisms, different structures, doping and alloying, positioncontrolled growth on substrates, and finally, their functional properties as catalysts, hydrophobic surfaces, sensors, and in nanoelectronic, optical, optoelectronic, and energy harvesting devices.

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Section: Inorganic Heterojunction Ledsmentioning

confidence: 99%

One-dimensional ZnO nanostructures: Solution growth and functional properties

2011

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“…The round-shaped spot is originated from the whole disk-shaped ZnO nanowires layer. Most previous works exhibited a strong EL emission from forward bias beyond 10 V at higher wavelength [148][149][150][151][152]. Another study showed different EL behavior from other nZnO/p-GaN heterojunctions where the EL generated only from either the n-ZnO or p-GaN side [143].…”

Section: Hybrid / Heterostructuresmentioning

confidence: 93%

Zinc Oxide Nanophotonics

Choi

Aharonovich

2015

Nanophotonics

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Abstract:The emerging field of nanophotonics initiated a dedicated study of single photon sources and optical resonators in new class of materials. One such material is zinc oxide (ZnO) that has been long considered only for classical light-emitting applications. However, it recently showed promise for quantum photonics technologies. In this review, we highlight the recent advances in studying single emitters in ZnO, engineering of optical cavities and practical nanophotonics devices including nanolasers and electrically triggered devices. We finalize with an outlook at this promising area, as well as provide perspectives and open questions in solid state nanophotonics employing ZnO.

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“…These properties include direct and wide band gap, large excitons binding energy and deep level defect emission [1,8,44,45]. As direct band gap is good for short wavelength photonics, high excitons binding energy permits effective excitonic emission at ambient temperature [46] and deep level defect emission is responsible for covering the whole visible region beside ultra violet emission [1,8,46,47].…”

Section: Optical Propertiesmentioning

confidence: 99%

Synthesis, Characterization and Applications of Metal Oxide Nanostructures

Hussain¹

2014

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The main objective of nanotechnology is to build self-powered nanosystems that are ultrasmall in size, exhibit super sensitivity, extraordinary multi functionality, and extremely low power consumption. As we all know that 21st century has brought two most important challenges for us. One is energy shortage and the other is global warming. Now to overcome these challenges, it is highly desirable to develop nanotechnology that harvests energy from the environment to fabricate self-power and low-carbon nanodevices. Therefore a self-power nanosystem that harvests its operating energy from the environment is an attractive proposition. This is also feasible for nanodevices owing to their extremely low power consumption. One advantageous approach towards harvesting energy from the environment is the utilization of semiconducting piezoelectric materials, which facilitate the conversion of mechanical energy into electrical energy. Among many piezoelectric materials ZnO has the rare attribute of possessing both piezoelectric and semiconducting properties. But most applications of ZnO utilize either the semiconducting or piezoelectric property, and now it’s time to fully employ the coupled semiconducting-piezoelectric properties to form the basis for electromechanically coupled nanodevices. Since wurtzite zinc oxide (ZnO) is structurally noncentral symmetric and has the highest piezoelectric tensor among tetrahedrally bonded semiconductors, therefore it becomes a promising candidate for energy harvesting applications. ZnO is relatively biosafe and biocompatible as well, so it can be used at large scale without any harm to the living environment. The synthesis of another transition metal oxide known as Co3O4 is also important due to its potential usage in the material science, physics and chemistry fields. Co3O4 has been studied extensively due to low cost, low toxicity, the most naturally abundant, high surface area, good redox, easily tunable surface and structural properties. These significant properties enable Co3O4 fruitful for developing variety of nanodevices. Co3O4 nanostructures have been focused considerably in the past decade due to their high electro-chemical performance, which is essential for developing highly sensitive sensor devices. I started my work with the synthesis of ZnO nanostructures with a focus to improve the amount of harvested energy by utilizing oxygen plasma treatment. Then I grow ZnO nanorods on different flexible substrates, in order to observe the effect of substrate on the amount of harvested energy. After that I worked on understanding the mechanism and causes of variation in the resulting output potential generated from ZnO nanorods. My next target belongs to an innovative approach in which AFM tip decorated with ZnO nanorods was utilized to improve the output energy. Then I investigated Co3O4 nanostructures though the effect of anions and utilized one of the nanostructure to develop a fast and reliable pH sensor. Finally to take the advantage of higher degree of redox chemistry of NiCo0O...

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Electro‐optical and cathodoluminescence properties of low temperature grown ZnO nanorods/p‐GaN white light emitting diodes

Cited by 38 publications

References 27 publications

One-dimensional ZnO nanostructures: Solution growth and functional properties

One-dimensional ZnO nanostructures: Solution growth and functional properties

Zinc Oxide Nanophotonics

Synthesis, Characterization and Applications of Metal Oxide Nanostructures

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