• 반도체디스플레이기술학회지
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• 제14권3호
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• pp.33-36
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• 2015

It has increased several decades in the field of Indium Tin Oxide (ITO) transparent thin film, However, a major problem with this ITO thin film application is high cost compared with other transparent thin film materials[1]. So far, in order to overcome this disadvantage, we show that a transparent ITO/Ag/i-ZnO multilayer thin film electrode would be more cost-effective and it has not only highly transparent but also conductive properties. The aim of this research has therefore been to try and establish how ITO/Ag/i-ZnO multilayer thin film would be more effective than ITO thin film. Herein, we report the properties of ITO/Ag/i-ZnO multilayer thin film by using optical spectroscopic method and measuring sheet resistance. At a certain total thickness of thin film, sheet resistance of ITO/Ag/i-ZnO multilayer was drastically decreased than ITO layer approximately $40{\Omega}/{\Box}$ at same visible light transmittance. (minimal point $5.2{\Omega}/{\Box}$). Tendency, which shows lowly sheet resistive in a certain transmittance, has been observed, hence, it should be suitable for transparent electrode device.

• 폴리머
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• 제36권6호
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• pp.803-809
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• 2012

에틸렌-테트라플르오르에틸렌(ETFE) 공중합체의 비등온 결정화 거동을 DSC와 imaging FTIR을 이용하여 살펴보았다. 변형 비등온 Avrami 분석 결과, DSC에 의한 열분석의 경우 상대적으로 적은 결정화 엔탈피 변화로 인하여 Avrami 식에 의한 ln[-ln(1-X(t))] vs. ln(t) 곡선이 선형을 이루지 못하는 반면, 결정화에 의한 IR 흡수 강도 image의 변화에 의한 분석 방법인 imaging FTIR의 경우보다 선형적인 결과를 얻음에 따라 imaging FTIR이 ETFE 비등온 결정화 연구에 보다 효과적임을 알 수 있었다. 이와 함께 비등온 결정화에 의한 ETFE의 광학특성을 살펴본 결과, 서냉에 의하여 형성된 ETFE 결정의 빛 산란에 의하여 haze가 증가하며 따라서 투명도가 감소함을 알 수 있으며 비등온 결정화에 의하여 최대 8%의 투과도 감소가 일어남을 확인할 수 있었다. 이상의 결과로부터 결정화를 조절하는 냉각속도가 유리 대체 소재로 사용되고 있는 ETFE 필름의 광투과도 조절에 주요한 가공 변수임을 확인할 수 있었다.

• 폴리머
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• 제35권1호
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• pp.60-65
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• 2011

고분자 나노복합재의 성능을 극대화 하기 위해서는 나노업자 분산도의 향상과 더불어 분산상태가 물성 변화에 미치는 영향을 정확히 이해하는 것이 매우 중요하다. 본 연구에서는 탄소나노튜브 첨가 고분자 복합재의 분산상태를 정량적으로 평가할 수 있는 방법을 제시하고자 하였다. 자외선-가시광선 분광광도법을 이용하여 탄소나노튜브의 분산상태에 따른 투과도를 측정하였으며, 동일 농도에서 분산상태가 향상됨에 띠라 투과도가 감소하는 것을 확인하였다. 이러한 결과를 바탕으로 기존의 Beer-Lambert 투과도 법칙에 분산상태의 변화를 포함할 수 있는 새로운 분산도 평가인자인 유효 농도 인자를 제시하였다. 이를 통해 탄소나노튜브의 분산상태의 변화와 함께 다양한 탄소나노튜브의 농도 및 시편 두께에 따른 투과도 결과를 분석함으로써 제시한 분산도 평가방법과 유효 농도 인자의 유효성을 확인하였다.

• 한국태양에너지학회:학술대회논문집
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• 한국태양에너지학회 2009년도 추계학술발표대회 논문집
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• pp.92-97
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• 2009

It is more necessary to consider the various factors for developmenting visible PV module of alternative window than traditional PV module. It must have sufficient performance which is Tvis, daylighting, daylight factor, glare index. so that more needs to consider suitable plan and total evaluated technology. Under the this background. For using commonly a combination BIPV module system and Daylinghting that can alternative architectural window, our goal on this study is drawing proper window area ratio as the window by analyzing lighting performance and glare index depending on transmittance of DSSC. On this study, we drew the result about window area ratio that can apply in the building when applying DSSC in the window. In situation that window is alternated as curtain wall in atrium that has big Widow area, if applying red 15.8% DSSC of low transmittance, it is expect to proper because it is suitable illumination standard and doesn't occur a discomfort glare. In case of office, we propose to apply red 33.2% or blue 35.2% DSSC of high transmittance for no affecting lighting load. we expect to contribute to select proper and effective window when applying the window in the building by drawing the window area ratio that can apply in thee building depending on transmittance of DSSC and offering the glare index data.

• ETRI Journal
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• 제35권4호
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• pp.730-733
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• 2013

In this work, buffer layers with various conditions are inserted at an n/i interface in hydrogenated amorphous silicon semitransparent solar cells. It is observed that the performance of a solar cell strongly depends on the arrangement and thickness of the buffer layer. When arranging buffer layers with various bandgaps in ascending order from the intrinsic layer to the n layer, a relatively high open circuit voltage and short circuit current are observed. In addition, the fill factors are improved, owing to an enhanced shunt resistance under every instance of the introduced n/i buffer layers. Among the various conditions during the arrangement of the buffer layers, a reverse V shape of the energy bandgap is found to be the most effective for high efficiency, which also exhibits intermediate transmittance among all samples. This is an inspiring result, enabling an independent control of the conversion efficiency and transmittance.

• 한국표면공학회지
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• 제52권6호
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• pp.289-292
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• 2019

Transparent and conducting titanium doped indium oxide (TIO) thin films were deposited by RF magnetron sputtering on zinc oxide (ZnO)-coated glass substrates to investigate the effect of the ZnO buffer layer on optical and electrical properties of TIO/ZnO bi-layered films. TIO 90 nm / ZnO 10 nm films having a lower resistivity (3.09×10^-3 Ωcm) and a higher visible transmittance (80.3%) than other TIO/ZnO films were prepared in this study. Figure of merit results indicate that a 10 nm thick ZnO thin film is an effective buffer layer that enhances optical transmittance and electrical conductivity of TIO films without intentional substrate heating or post-deposition annealing.

• 한국전기전자재료학회논문지
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• 제27권8호
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• pp.483-485
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• 2014

Transparent amorphous In-Si-O (ISO)/Ag/In-Si-O (ISO) has been reported for low emissivity (low-e) applications. Effective Si doping into the $In_2O_3$ matrix led to a completely amorphous ISO film as well as a low resistivity and a high optical transmittance. The optical and electrical performances were examined by measuring transmittance with a UV-VIS spectrophotometer and resistivity with a Hall effect measurement. Consequently, low-e glass with ISO/Ag/ISO showed a high transparency in the visible region and low emissivity in the infrared region, indicating that ISO is a promising amorphous transparent electrode for low-e glass.

• 정보저장시스템학회논문집
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• 제6권2호
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• pp.68-73
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• 2010

The interest in acquiring high efficiency solar cells has been steadily increasing due to various advantages such as low-cost installation, pollution free and everlasting energy generation. In order to raise the cell efficiency, there has been a lot of effort to develop effective anti-reflection coatings. In this work, the main objective was to investigate the effects of particle size and annealing temperature of silica anti-reflection coatings to maximize the cell efficiency as well as reliability. It was shown that the light transmittance could be increased by a few percent over a certain range of wavelength using the silica coating. Also, the tribological properties of the coating could be improved through the annealing process, which led to better reliability of the coating.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2006년도 하계학술대회 논문집 Vol.7
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• pp.440-441
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• 2006

We have studied the narrow viewing angle liquie crystal displays (LCDs) using a hybrid aligned nematic liquid crystal (LC) cell driven by a fringe field. The device using a LC with positive dielectric anisotropy has a relatively low transmittance. This paper describes how to improve light efficiency by optimizing electrode structure. The results show that the device exhibits a high transmittance of 90%, low driving voltage and narrow viewing angle less than $20^{\circ}$ along horizontal direction which is highly effective for private display application.

• KIEAE Journal
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• 제16권2호
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• pp.79-85
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• 2016

Purpose: It is difficult to calculate frame U-value because of the two reason. First is selection of air properties in cavity. Second is calculation method in window frame. For this reason, it is important to decide cavity properties in window frame. However, international standards offered different method(ISO 15099, ISO 10077) and air properties was changed according to the two methods. The aim of this study was to suggest method for deriving accurate frame U-value using international standard methods and CFD simulation. Method: First, this study conducted analysis calculation method of ISO 15099 and ISO 10077. And, CFD simulation conducted based on same condition. Finally, ISO calculation and CFD simulation results were verified through comparison with real experiment results. Result: The results show that effective conductivity of ISO 15099 was the highest value. ISO 10077 and CFD result followed. The convergent values of ISO 10077 was the highest. ISO 15099 and CFD followed. ISO calculation reflecting CFD simulation results will reduce error with experimental results.