Pulsed laser deposition of gallium nitride thin films on sapphire substrates

Devitsky, O.V.; Nikulin, Dmitry A.; Sysoev, I. A.

doi:10.1063/5.0032227

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…The smooth, uniform, and fine surface roughness could be recognized. The root mean square is 39.04 (nm), the average surface roughness is 20.15 (nm), and the thickness of the film is found to be about 2.426 μm 8,11,45,46 7 shows a field emission scanning electron micrograph (FESEM) of the employed GaN film taken before depositing ITO: PMMA and ITO:PEDOT: PSS: PMMA substrates. The picture reveals the surface morphology of prepared films on a nanoscale.…”

Section: Gan Thin Film Investigation 311 Atomic Force Microscopy (Afm...mentioning

confidence: 99%

Optimizing charge transport in hybrid GaN-PEDOT:PSS/PMMADevice for advanced application

Fakhri,

Salim,

Ketab

et al. 2024

Sci Rep

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Organic–inorganic hybrid light-emitting devices have garnered significant attention in the last few years due to their potential. These devices integrate the superior electron mobility of inorganic semiconductors with the remarkable optoelectronic characteristics of organic semiconductors. The inquiry focused on analyzing the optical and electrical properties of a light-emitting heterojunction that combines p-type GaN with organic materials (PEDOT, PSS, and PMMA). This heterojunction is an organic–inorganic hybrid. The procedure entailed utilizing a spin-coating technique to apply a layer of either poly(methyl methacrylate) (PMMA) or a mixture of PMMA and poly(3,4ethylenedioxythiophene)-poly(styrene sulfonate) (PEDOT: PSS) onto an indium tin oxide (ITO) substrate. Subsequently, different Nd:YAG laser pulses (200, 250, and 300 pulses) were used to administer a GaN inorganic layer onto the prepared organic layer using a pulsed laser deposition approach. Subsequently, the thermal evaporation technique was employed to deposit an aluminum electrode on the top of the organic and inorganic layers, while laser pulses were fine-tuned for optimal performance. The Hall effect investigation verifies the p-type conductivity of the GaN material. The electroluminescence studies confirmed the production of blue light by the GaN-based devices throughout a range of voltage situations, spanning from 45 to 72 V.

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Section: Gan Thin Film Investigation 311 Atomic Force Microscopy (Afm...mentioning

confidence: 99%

Optimizing charge transport in hybrid GaN-PEDOT:PSS/PMMADevice for advanced application

Fakhri,

Salim,

Ketab

et al. 2024

Sci Rep

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show abstract

“…В методе лазерного напыления используются присадочные материалы преимущественно порошкового и проволочного типа, скорость подачи которых варьируется от 0,5 до 11 м/мин, при этом расстояние между лазерной головкой и образцом составляет 50…150 мм. В качестве источника лазерного излучения CO 2 в основном используются лазеры с мощностью в пределах 1…5 кВт [17]. Основными компонентами технологического газа, который подается в рабо-чую область, могут быть как химически активные газы (азот или кислород), так и инертные газы (гелий или аргон).Также существует вариант, когда напыляемый порошок нагревается с использованием лазерного пучка.…”

Section: лазерные технологии нанесения функциональных покрытийunclassified

The current state of laser technologies in the field of functional coatings

Palabugin,

Kalyuzhny

2023

Vestnik IzhGTU imeni M.T. Kalashnikova

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Two main directions in the field of laser radiation application for functional coatings are considered - the application of coatings using purely laser study and the combination of laser and other technologies. The most popular technological lasers used in both directions are identified: gas molecular lasers, diode, fiber, and solid-state lasers. Methods of hardening heat treatment of parts using a laser beam both with and without melting of the material are considered. A method of introducing alloying components of metallic and non-metallic nature into the substrate material using laser technologies is presented. The methods of laser surfacing are given, where the surfacing material is fed into the zone of exposure to laser radiation both in the form of a powder mixture and in the form of a filler wire. Powder mixture is most commonly used as surfacing material, wire is less often used. Technologies of laser-assisted evaporation used in the creation of three-dimensional objects are considered. Hybrid technologies of coating deposition are presented - laser surfacing using a plasma arc and high-frequency heating. It was found out that two types of plasmatrons are used in laser-plasma surfacing - direct and indirect types of action. In addition to hybrid laser surfacing, the method of hybrid laser-assisted evaporation is considered - plasma sputtering, or LAAPS, accompanied by laser heating and allowing to obtain coatings with increased adhesion strength to the substrate surface. The main advantages (the ability to adjust the thickness of the deposited coating layers, reduction of the thermal impact zone) and disadvantages (occurrence of cold microcracks on the surface, formation of pores in the coating) in the application of coatings using laser radiation are considered. The prospects for the development of laser and laser-plasma technologies in the field of functional coatings are analyzed on the example of practical application. The development of these technologies in future is largely due to the elimination of their shortcomings, increasing the efficiency of interaction between laser and plasma technologies.

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Effect of thermal annealing on the structural evolution of thin ceramic YAG: Ce films grown by pulsed laser deposition

Devitsky,

Kravtsov

2024

Ceramics International

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Pulsed laser deposition of gallium nitride thin films on sapphire substrates

Cited by 4 publications

References 3 publications

Optimizing charge transport in hybrid GaN-PEDOT:PSS/PMMADevice for advanced application

Optimizing charge transport in hybrid GaN-PEDOT:PSS/PMMADevice for advanced application

The current state of laser technologies in the field of functional coatings

Effect of thermal annealing on the structural evolution of thin ceramic YAG: Ce films grown by pulsed laser deposition

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