Zigzag and Helical AlN Layer Prepared by Glancing Angle Deposition and Its Application as a Buffer Layer in a GaN-Based Light-Emitting Diode

Chen, Lung-Chien; Tien, Ching-Ho; Liu, Xuguang; Xu, Bingshe

doi:10.1155/2012/409123

Cited by 5 publications

(3 citation statements)

References 27 publications

(30 reference statements)

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“…Thus, GLAD thin films, prepared by either evaporation or magnetron sputtering are becoming an attractive strategy to obtain a wide variety of architectures and sculptured materials at the micro-and nanoscale. This involvement is mostly evident for metal and oxide coatings sputter deposited with inclined architectures [39][40][41][42][43] but very few studies are dedicated to metallic nitrides produced by the GLAD technique [44][45][46], especially regarding the relations between the possible achieved structures by GLAD (e.g. inclined columns, zigzags, spirals) and the resulting properties in terms of mechanical response, electrical conductivity or even electrochemical behaviour.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical characterization of nanostructured Ag:TiN thin films produced by glancing angle deposition on polyurethane substrates for bio-electrode applications

Pedrosa

Machado

Fiedler

et al. 2016

Journal of Electroanalytical Chemistry

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Section: Introductionmentioning

confidence: 99%

Electrochemical characterization of nanostructured Ag:TiN thin films produced by glancing angle deposition on polyurethane substrates for bio-electrode applications

Pedrosa

Machado

Fiedler

et al. 2016

Journal of Electroanalytical Chemistry

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“…GLAD is widely adaptable to a variety of the synthesis spiral or helical metal oxide ceramic materials, such as TiO 2 (Figure 2b), [73] SiO 2 ( Figure 2c), [74] ZrO 2 ( Figure 2d), [75] WO 3 (Figure 2e), [76] HfO 2 ( Figure 2f), [77] AlN (Figure 2g), [78] Ta 2 O 5 , [79] etc. Recently, GLAD technology has been used in the preparation of hybrid ceramic materials and heterostructure materials.…”

Section: Glancing Angle Depositionmentioning

confidence: 99%

Chiral Nanoceramics

Fan

Kotov

2020

Advanced Materials

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Jinchen Fan received his Ph.D. degree from Shanghai Jiao Tong University in 2014. He is now an associate professor at Shanghai University of Electric Power, China. He joined Prof. Kotov's group as a visiting scholar from October 2017 to October 2019. His current research focus is on the fabrication of chiral nanoceramics and their applications in chiroptical activity and catalysis. 2.2. Chiral Assemblies and Soft Templates Most of organic amphiphiles can be assembled into chiral superstructures. [43] This series of superstructures can be used as soft templates in the preparation of helical ceramic nanomaterials including, SiO 2 , [44] Ta 2 O 5 , [45] TiO 2 , [46] ZrO 2 , [47] and poly(bi ssilsesquioxane) [48] via the sol-gel transcription approach. Similarly, bio-macromolecules, such as peptides and DNA can serve as templates for realizing chiral ZnO [49] and silica structures. [50] Chiral synthesis with sodium cholate (SC) also serves as a representative example of this method. Because of its amphiphilic character, SC self-assembles into a unique bilayer structure through the hydrogen bonding between hydroxyl groups. [51] Huang and co-workers [51b] used the SC assembled via coordination with calcium ions, well-defined helical nanoribbons for creating additional helical SiO 2 and ZnS by sol-gel process. Methods of chirality transfer from soft templates often include self-organization ceramic building blocks based on hydrogen bonding, van der Waals forces, π-π stacking, hydrophobic effect, electrostatic and Coulomb interactions, and metal coordination. [41] One of representative examples of chiral assembly is the preparation of chiral nanostructured silica that proceeds via Nicholas A. Kotov pioneered conceptual foundations and technical realizations of biomimetic nanostructures, which include chiral nanomaterials. Chiral ceramic nanostructures are being investigated in his laboratory for optical, magnetic, biological, and catalytic properties. His contribution to technology include nacremimetic nanocomposites including those from graphene oxide, 3D tissue replicas for drug-testing, chiral biosensors, and cartilage-like electrolytes for batteries. He is a founder of several start-up companies that commercialized bioinspired nanomaterials for biomedical, energy, and automotive technologies.

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“…Light-emitting diodes have many advantages over conventional light sources, such as their narrow spectrum, long lifetime, and good mechanical stability [1,2]. High-brightness LEDs have been proven to have excellent abilities to function in back and general lighting applications [3].…”

Section: Introductionmentioning

confidence: 99%

Simulation of an Improved Design for n-Electrode with Holes for Thin-GaN Light-Emitting Diodes

Hwu¹

2013

Journal of Nanomaterials

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A novel design is proposed for n-electrode with holes to be applied in Thin-GaN light-emitting diodes (LEDs). The influence of the n-electrode with holes on the thermal and electrical characteristics of a Thin-GaN LED chip is investigated using a three-dimensional numerical simulation. The variations in current density and temperature distributions in the active layer of n-electrodes both with and without holes are very tiny. The percentages of light output from these holes are 29.8% and 38.5% for cases with 5 μm holes and 10 μm holes, respectively; the side length of the n-electrode (L) is 200 μm. Furthermore, the percentage increases with the size of the n-electrode. Thus, the light output can be increased 2.45 times using the n-electrode with holes design. The wall-plug efficiency (WPE) can also be improved from 2.3% to 5.7%. The most appropriate n-electrode and hole sizes are determined by WPE analysis.

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Zigzag and Helical AlN Layer Prepared by Glancing Angle Deposition and Its Application as a Buffer Layer in a GaN-Based Light-Emitting Diode

Cited by 5 publications

References 27 publications

Electrochemical characterization of nanostructured Ag:TiN thin films produced by glancing angle deposition on polyurethane substrates for bio-electrode applications

Electrochemical characterization of nanostructured Ag:TiN thin films produced by glancing angle deposition on polyurethane substrates for bio-electrode applications

Chiral Nanoceramics

Simulation of an Improved Design for n-Electrode with Holes for Thin-GaN Light-Emitting Diodes

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