• 제목/요약/키워드: Aerosol-deposition process

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Aerosol Deposition 법을 이용한 CIGS 태양전지의 광흡수층 형성 (The Formation of Absorption Layer for the CIGS Solar Cell by Aerosol Deposition Method)

  • 김인애;신효순;여동훈;정대용
    • 한국전기전자재료학회논문지
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    • 제26권12호
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    • pp.909-914
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    • 2013
  • CIGS is one of thin film solar cell and has been studied so much, because of the possibility of low price and high efficiency. Until now, co-evaporation and sputtering were typical method to prepare CIGS absorption layer, and a few company commercialized solar cell by these method. However, non-vacuum process which has been studied for long time has not been progressed, though the merit of low price. Especially, aerosol deposition method has not been reported, because it is difficult to prepare a large quantity of various CIGS powder. In this study, CIGS powder was synthesized by mechanochemical method and CIGS absorption layer was deposited by aerosol deposition method. The thickness of the CIGS layer was controlled by the number of deposition and the surface roughness of it was affected by the amount of flow gas. And, also, I-V curve of it appeared metallic property in the case of 'as deposition'. After heat treatment in Se-rich atmosphere, the electrical property of it changed to a semiconductor. CdS and transparent conduction layer were formed by a typical method on it for solar cell. The efficiency of cell was appeared 0.19%. Though the efficiency was low because of the disharmony in the after-process, it was conformed that CIGS solar cell could be prepared by aerosol deposition.

에어로졸 증착법에 의한 $Al_2O_3$ 박막의 증착 및 특성 평가 (Characterization of $Al_2O_3$, Thin Film Deposited by Aerosol Deposition Method)

  • 조현민;김형준
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2007년도 추계학술대회 논문집
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    • pp.24-24
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    • 2007
  • Aerosol deposition(AD) method is a emerging technology for the room temperature deposition of the dielectric thin films with high quality. In this study, $Al_2O_3$ thin films were deposited by aerosol deposition method directly from raw powders. To get uniform and smooth film surface, Process parameters such as gas consumption rate, nozzle-substrate distance and vibration speed were optimized. From XRD results, $Al_2O_3$ thin films have the same crystal structures with starting powders. $Al_2O_3$ thin films also showed dense microstructure. Electrical properties of the thin films were also investigated.

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수정된 화학증착공정에서 에어로졸 역학, 열전달 및 물질전달 해석 (Analysis of Aerosol Dynamics, Heat and Mass Transfer in the Modified Chemical Vapor Deposition)

  • 박경순;이방원;최만수
    • 대한기계학회논문집B
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    • 제23권2호
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    • pp.262-271
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    • 1999
  • A study of aerosol dynamics has been done to obtain axially and radially varying size distributions of particles generated in the Modified Chemical Vapor Deposition process. Heat and mass transfer have also been studied since particle generation and deposition strongly depend on the temperature field in a tube. Bimodal size distributions of particles have been obtained both in the particulate flow and in the deposited particle layer for the first time using the sectional method to solve aerosol dynamics. Variations of geometric mean diameter, geometric standard deviation have been studied for various parameters; flow rates and maximum wall temperature. The comparison between one-dimensional and two-dimensional approaches has also been made.

Particle Deposition, PD Process - New Potential in Material Processing -

  • Fukumoto, Masahiro
    • 한국분말야금학회:학술대회논문집
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    • 한국분말야금학회 2006년도 Extended Abstracts of 2006 POWDER METALLURGY World Congress Part 1
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    • pp.47-48
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    • 2006
  • Oridinal thermal spray process has developed into two ways, namely, temperature dominated represented by plasma spraying, and velocity dominated represented by HVOF. It is common for both that the particle materials sprayed are basically in melted or half melted condition. New process has developed recently, that is, Cold Spray and Aerosol Deposition. Particle's heating is limited in CS lower than half of the material's melting point. Moreover, exactly no heating is loaded in AD process. Through the investigation on common feature for these three spraying processes, potential of new material process - Particle Deposition, PD - is considered and proposed.

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Aerosol Losses in a 100L $Tedlar^{(R)}$ Bag

  • Oh, Sewon
    • Journal of Korean Society for Atmospheric Environment
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    • 제20권E2호
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    • pp.61-68
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    • 2004
  • Aerosol losses in a 100L Tedlar$^{(R)}$ bag were investigated for the aerosols with number median diameter of 0.05 ${\mu}{\textrm}{m}$ and number concentration of 6.4 ${\times}$ 10$^4$ cm$^{-3}$ . Over a 1 hr period, loss of particles in the bag is apparent, and the volume decrease with time is significant. The number concentration, surface area, and volume concentration of the aerosols decreased to 34, 50, and 52% of the initial value in 30 min, respectively. This indicates that deposition to the walls was the main loss process for aerosols in the Tedlar$^{(R)}$ bag. Theoretical calculations showed that coagulations and deposition by diffusion and gravitational sedimentation would not change aerosol characteristics significantly, and the electrical force was the dominant loss process for particles in the Tedlar$^{(R)}$ bag over a 1 hr period.eriod.

Aerosol Deposition Nozzle Design for Uniform Flow Rate: Divergence Angle and Nozzle Length

  • Kim, Jae Young;Kim, Young Jin;Jeon, Jeong Eun;Jeon, Jun Woo;Choi, Beom Soo;Choi, Jeong Won;Hong, Sang Jeen
    • 반도체디스플레이기술학회지
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    • 제21권2호
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    • pp.38-44
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    • 2022
  • Plasma density in semiconductor fabrication equipment becomes higher to achieve the improved the throughput of the process, but the increase of surface corrosion of the ceramic coated chamber wall has been observed by the increased plasma density. Plasma chamber wall coating with aerosol deposition prefer to be firm and uniform to prevent the potential creation of particle inside the chamber from the deformation of the coating materials, and the aerosol discharge nozzle is a good control factor for the deposited coating condition. In this paper, we investigated the design of the nozzle of the aerosol deposition to form a high-quality coating film. Computational fluid dynamics (CFD) study was employed to minimize boundary layer effect and shock wave. The degree of expansion, and design of simulation approach was applied to found out the relationship between the divergence angle and nozzle length as the key parameter for the nozzle design. We found that the trade-off tendency between divergence angle and nozzle length through simulation and quantitative analysis, and present the direction of nozzle design that can improve the uniformity of chamber wall coating.

Annealing Temperature Dependence of Magnetic and Optic Properties of Bi:YIG Films Deposited with Aerosol Deposition Method

  • Shin, Kwang-Ho;Mizoguchi, Masahiko;Inoue, Mitsuteru
    • Journal of Magnetics
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    • 제12권3호
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    • pp.129-132
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    • 2007
  • Bismuth-substituted yttrium iron garnet (Bi:YIG, $Bi_{0.5}Y_{2.5}Fe_5O_{12}$) films were deposited with aerosol deposition method and their magnetic and optical properties were investigated as a function of annealing temperature. Since the ceramic films deposited with aerosol deposition method have not a perfect crystal structure due to non-uniform internal stress occurred by mechanical collision during their deposition, the post annealing could be a key process to release its internal stress and to improve its micro structure for optimizing the magnetic and magneto-optic properties of films. The crystallinity of Bi: YIG film was improved with increase of annealing temperature, and the saturation magnetization increased up to 87 emu/cc at $800^{\circ}C$. The Faraday rotation increased up to $1.4deg/{\mu}m$ by annealing at $700^{\circ}C$ around the wavelength of $0.5{\mu}m$. The optical transmittance of the Bi:YIG film was also improved in visible region.

상온 분사 공정을 이용하여 제조한 고에너지 밀도 세라믹 유전체 커패시터 (High Energy Density Dielectric Ceramics Capacitors by Aerosol Deposition)

  • 송현석;이건;예지원;정지윤;정대용;류정호
    • 한국전기전자재료학회논문지
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    • 제37권2호
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    • pp.119-132
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    • 2024
  • Dielectric ceramic capacitors present high output power density due to the fast energy charge and discharge nature of dielectric polarization. By forming dense ceramic films with nano-grains through the Aerosol Deposition (AD) process, dielectric ceramic capacitors can have high dielectric breakdown strength, high energy storage density, and leading to high power density. Dielectric capacitors fabricated by AD process are expected to meet the increasing demand in applications that require not only high energy density but also high power output in a short time. This article reviews the recent progress on the dielectric ceramic capacitors with improved energy storage properties through AD process, including energy storage capacitors based on both leadbased and lead-free dielectric ceramics.

입자 사이즈에 따른 Cu 필름의 에어로졸 성막 거동에 대한 연구 (Study on Aerosol Deposition Behavior of Cu Films According to Particle Size)

  • 이동원;오종민
    • 한국전기전자재료학회논문지
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    • 제30권4호
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    • pp.235-240
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    • 2017
  • The effect of particle sizes on the aerosol deposition (AD) of Cu films is investigated in order to understand the deposition behaviors of metal powder during the AD process. The Cu coatings fabricated by using $2{\mu}m$ Cu powders had a dense microstructure, a high deposition rate ($1.6{\pm}0.2{\mu}m/min$), and low resistance ($9.42{\pm}0.4{\mu}{\Omega}{\cdot}cm$) compared to that from using Cu powder with a particle size greater than $5{\mu}m$. Also, from estimating the internal micro-strain of Cu films, the Cu coatings fabricated by using $2{\mu}m$ Cu particles exhibited a high micro-strain value of $3.307{\times}10^{-3}$. On the other hand, the strain of Cu coatings fabricated with $5{\mu}m$ particles was decreased to $2.76{\times}10^{-3}$. These results seem to show that the impacted Cu particles are compressed and flattened by shock waves, and that their bonding is associated with the high internal micro-strain caused by plastic deformation.

에어로졸 증착법[aerosol depostion method]에 의한 $Ba[Ce_{0.9}Y_{0.1}]O_{3-\delta}$ - Ni 수소분리막 제조 ($Ba[Ce_{0.9}Y_{0.1}]O_{3-\delta}$ - Ni Composite Membrane for Hydrogen Separation by Aerosol Deposition Method)

  • 박영수;변명섭;최진섭;김진호;황광택
    • 한국수소및신에너지학회논문집
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    • 제21권2호
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    • pp.117-122
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    • 2010
  • BCY($Ba(Ce_{0.9}Y_{0.1})O_{3-\delta}$) oxide, shows high protonic conductivity at high temperatures, and are referred to as hydrogen separation membrane. For high efficiency of hydrogen separation ($H_2$ flux and selectivity) and low fabrication cost, ultimate thin and dense BCY-Ni layer have to be coated on a porous substrate such as $ZrO_2$. Aerosol depostion (AD) process is a novel technique to grow ceramic film with high density and nano-crystal structure at room-temperature, and would be applied to the fabrication process of AD integration ceramic layer effectively. XRD and SEM measurements were conducted in order to analyze the characteristics of BCY-Ni membrane fabricated by AD process.