• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1988년도 춘계학술대회 논문집
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• pp.74-77
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• 1988

This paper reports the properties of antireflection structure and hole formation of Te-based systems. The optical-recording characteristics of metallic recording media are enhanced significantly by incorporating the metal(Al) layer into an antreflection trilayer structure. Due to the interface condition inherent in the design of the trilayer structure, reflectivity from holes is ranked low fraction (<10%). The hole formation is carried by $Ar^+$ Laser(488nm). For 20nsec pulse duration, hole opening power(threschold) of $(Te_{86}Se_{14})_{50}Bi_{50}$ trilayer is lower than that of monolayer that used in this experiment. Hole shapes of the whole sample were clean.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2005년도 추계학술대회 논문집 Vol.18
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• pp.113-114
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• 2005

We present the effect of substrate temperature on the structural and optical properties of ZnO films grown on sapphire substrate by pulsed laser deposition. Growing at higher substrate temperature results in an increase in the surface roughness. The optimum c-axis orientation of the ZnO films occurs at the substrate temperature of 700$^{\circ}C$ The decay time shows a rapid increase in the substrate temperature from 400$^{\circ}C$ to 500$^{\circ}C$ and falls down gradually as the substrate temperature is approached to 700$^{\circ}C$.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2007년도 추계학술대회 논문집
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• pp.446-447
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• 2007

The rapid thermal annealing effect of transparent IZTO(indium zinc oxide) and IAZO(indium alminium zinc oxide) films grown on glass substrate for solar cell or flat panel displays(FPDs) was studied. We prepared IZTO using RF magnetron sputtering and IAZO using DC co-sputtering method. Subsequently, using rapid thermal annealing(RTA) system, prepared IZTO and IAZO films were annealed at 300, 400, 500, $600^{\circ}C$ for 90sec. In addition, Electrical and optical characteristics were measured by Hall effect measurement and UV/Vis spectrometer examinations, respectively. To analyze structural properties and surface smoothness of the IZTO and IAZO films, XRD and SEM examinations were performed, respectively. It was shown that IZTO and IAZO films exhibited microcrystalline structure over $400^{\circ}C$ and amorphous structural regardless of RTA temperature, respectively.

• 한국표면공학회지
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• 제56권6호
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• pp.451-456
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• 2023

Transparent conducting films having a three layered structure of ZnO/Cu/ZnO (ZCZ) were deposited onto the glass substrates by using RF and DC magnetron sputtering at room temperature. The emissivity and opto-electrical properties of the films were investigated with a varying thickness(5, 10, 15 nm) of the Cu interlayer. With increasing the Cu thickness to 15 nm, the films showed a enhanced electrical properties. Although ZnO 30/Cu 15/ZnO 30 nm film shows a lower resistivity of 5.2×10^-5 Ωcm, it's visible transmittance is deteriorated by increased optical absorbtion of the films. In addition, X-ray diffraction patterns indicated that the insertion of Cu interlayer improve the grain size of ZnO films, which is favor for the electrical and optical properties of transparent conducting films. From the observed low emissivity of the films, it is concluded that the ZCZ thin films with optimal thickness of Cu interlayer can be applied effectively for the car's window coating materials.

• 마이크로전자및패키징학회지
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• 제21권1호
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• pp.7-11
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• 2014

최근 유기태양전지의 효율향상을 위하여 고분자의 PEDOT:PSS 양극(Anode) 버퍼층이 널리 사용되고 있다. 그러나 고효율 태양전지의 개발과 더불어 새로이 적용되고 있는 역구조 유기 태양전지에는 이 같은 친수성의 PEDOT:PSS 고분자가 소수성의 양극이나 광활성층 상에 균일하게 코팅되는 것이 문제점으로 지적되고 있다. 이러한 문제점을 극복하기 위해서 양극 버퍼층으로 $V_2O_5$와 같은 p-type 금속산화물을 사용한 연구가 많이 보고되고 있다. 본 연구에서는 저항을 낮추고 홀 이동도를 향상 시키기 위해 Ag를 삽입층으로 한 $V_2O_5$/Ag/ITO 구조의 다층 박막을 제작하고 Ag두께에 따른 전기적, 광학적, 구조적 특성의 변화에 대하여 살펴보았다. 가시광 영역에서는 Ag 두께가 증가함에 따라 광 투과율이 감소하는 반면 전기적 특성은 향상되는 것을 볼 수 있었다. 광소자의 투명전극산화물로 적합한 구조인지 평가하기 위해 Figure Of Merit(FOM)의 값을 측정하였고, 그 결과 Ag의 두께가 4 nm에서 가장 좋은 특성을 나타냈다. $V_2O_5$/Ag/ITO 구조의 다층 박막은 가시광 영역에서 Ag의 두께가 4 nm일 때 88%의 광 투과율을 나타내었고 저항 값은 $4{\times}10^{-4}{\Omega}cm$로써 광소자로 적합한 구조임을 확인하였다.

• 한국결정성장학회지
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• 제11권6호
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• pp.252-258
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• 2001

($Ba_{0.7}Sr_{0.3})TiO_3$박막을 ITO-coated glass 기판위에 spin-coating법으로 제조하였다. 제조된 용액을 초음파 bath 내에서 초음파 처리하여 균일화를 촉진시킨 후 박막을 제조하여 초음파 처리하지 않은 용액으로 제조한 박막과의 비교를 통하여 초음파 효과를 알아보았다. 용액의 초음파 처리로 박막의 결정화 온도를 다소 낮추었으며 박막의 표면이 보다 균일하고 치밀화되었고 거칠기도 8.4nm에서 5.6nm로 더 낮아졌다. 그리고 박막의 투광성 및 전기적 특성 또한 용액의 초음파 처리로 인하여 향상되었다.

• 한국전기전자재료학회논문지
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• 제21권10호
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• pp.938-942
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• 2008

Electrical and optical properties of semitransparent Ag and Al layer were studied, which are used for the electrodes in top-emission organic light-emitting diodes. Sheet resistance and transmittance of visible light through a thin layer were measured and analyzed. Several thin metal layers of Ag and Al were deposited onto a glass substrate up to a thickness of 50 nm using a thermal evaporation. Sheet resistance measurements show that a layer thickness is needed more than 15 nm and 20 nm for Ag and Al, respectively, when a proper sheet resistance is assumed to be less than $50{\Omega}/sq$. From the measurements of transmittance of visible light through a thin-metal layer, metallic behavior was observed when the layer thickness is over 25 nm for both films. Thus, from a study of sheet resistance and transmittance of visible light, a minimum proper thickness of semitransparent metal layer is 20 nm and 25 nm for Ag and Al, respectively.

• Macromolecular Research
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• 제17권4호
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• pp.207-217
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• 2009

The discovery of carbon nanotubes(CNTs) has opened up exciting opportunities for the development of novel materials with desirable properties. The superior mechanical properties and excellent electrical conductivity make CNTs a good filler material for composite reinforcement. However, the dispersal of CNTs in a polymer solution or melt is difficult due to their tendency to agglomerate. Many attempts have been made to fully utilize CNTs for the reinforcement of polymeric media. Therefore, different types of polymer/CNTs nanocomposites have been synthesized and investigated. This paper reviews the current progress in the preparation, properties and application of polyamide/CNTs(nylon/CNTs) nanocomposites. The effectiveness of different processing methods has increased the dispersive properties of CNTs and the amelioration of their poor interfacial bonding. Moreover, the mechanical properties are significantly enhanced even with a small amount of CNTs. This paper also discusses how reinforcement with CNTs improves the electrical thermal and optical properties of nylon/CNTs nanocomposites.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2003년도 하계학술대회 논문집 Vol.4 No.2
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• pp.857-860
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• 2003

Tin doped indium oxide(ITO) and Al doped zinc oxide(ZnO:Al) films, which are widely used as a transparent conductor in optoelectronic devices such as solar cell, liquid crystal display, plasma display panel, thermal heater, and other sensors, were prepared by using the capacitively coupled DC magnetron sputtering method. The electrical and optical properties of both the ITO and ZnO:Al thin films were investigated as functions of substrate temperature, working gas pressure and deposition time. ITO and ZnO:Al films with the the present experimental conditions of temperature and pressure showed resistivity of $2.36{\times}10^{-4}{\Omega}-cm,\;9.42{\times}10^{-4}{\Omega}-cm$ and transmittance of 86.28%, 90.88% in the wavelength range of the visible spectrum, respectively.

• Journal of Electrical Engineering and Technology
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• 제2권4호
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• pp.518-524
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• 2007

This paper describes several improved characterizations of the EPIC CCD, which now has modified electrode and channel structures. From a 3-D numerical simulation of the device, its channel doping and potential distributions are then observed for the optimization of the charge transfer. A wavelength-dependence on the device structure is observed in terms of the reflectivity of the incident radiation. The optical properties of ultra-low energy levels, when using an open-electrode structure, are then considered to improve their quantum efficiency.