• 제목/요약/키워드: Light Material

검색결과 3,782건 처리시간 0.028초

집광형 태양전지 모듈의 전기적 특성에 관한 연구 (The Electrical Characteristics of Spot Light Solar Cell Modules)

  • 김범준;강이구;류세환
    • 한국전기전자재료학회논문지
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    • 제24권6호
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    • pp.440-444
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    • 2011
  • We have analyzed electrical characteristics of spot light solar cell modules and have completed fabrication of spot light solar cell modules. Before we test modules, we have carried about UV test of hologram. As a result of test, we have obtained 165% efficiency of hologram film. the other hand, we obtained 75% efficiency of general films. After we have fabricated solar modules and carried about field test, spot light solar cell modules with hologram have been investigated 17.3 A of Isc and 155.4 W of power.

차량 경량화를 위한 이종소재 접합 연구 (Heat Generation and Machining Accuracy According to Material for Ultra-Precision Machining)

  • 이경일;김재열;이동기
    • 한국기계가공학회지
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    • 제17권6호
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    • pp.130-135
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    • 2018
  • Currently the automobile market is developing eco-friendly vehicles in order to cope with fuel efficiency regulations. Many studies have been conducted to improve travel performance and fuel economy of the environment-friendly vehicles, and vehicle manufacturers study how to manufacture light-weight vehicles for improving fuel economy for both existing vehicles and environment-friendly vehicles. Exemplary light-weight vehicle technologies include optimal design of vehicle body structure which is a light-weight vehicle method by changing component shapes or layout to optimize the vehicle body structure and the new process technology for using new light-weight and very strong materials Various studies.

실내건축 공간 디자인을 위한 '빛' 관련 디자인개념 추출 - 빛에 의한 시지각적 현상(現象)으로서의 공간 조형성을 중심으로 - (Extraction of Design Concepts of Light for the Architectural Interior Space - Focused on the plastic character of space as visual phenomenon by Light -)

  • 유영희
    • 한국실내디자인학회논문집
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    • 제16권2호
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    • pp.115-122
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    • 2007
  • The purpose of this study is to extract design concepts, especially in relation to light, as a part of extracting design concepts in architectural interior design. This study consists of two steps. Firstly, appropriate design concepts are extracted from various design characteristics. Secondly, these concepts are classified in the frame of other components of architectural space, as well as in the frame of the plastic characteristics of light. Various design characteristics were analyzed, those of which relating to the plastic character of space, namely, visual phenomenon. As a result of the analysis, 32 concepts were extracted. These concepts, in the frame of other components of architectural space (space, form, structure, opening of space, material, color, inside & outside relationship), were classified, as well as In the frame of the plastic character of Light (transparency, perception, direction, ornament). As the results of this research, the suggested design concepts will be a study material, available to the interior designers as well as students who want to utilize the organized study concepts.

머신 비전 라인 스캔 카메라를 위한 라인 스캔 광원의 제어 특성에 관한 연구 (A Study on the Control Characteristics of Line Scan Light Source for Machine Vision Line Scan Camera)

  • 김태화;이천
    • 한국전기전자재료학회논문지
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    • 제34권5호
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    • pp.371-381
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    • 2021
  • A machine vision inspection system consists of a camera, optics, illumination, and image acquisition system. Especially a scanning system has to be made to measure a large inspection area. Therefore, a machine vision line scan camera needs a line scan light source. A line scan light source should have a high light intensity and a uniform intensity distribution. In this paper, an offset calibration and slope calibration methods are introduced to obtain a uniform light intensity profile. Offset calibration method is to remove the deviation of light intensity among channels through adding intensity difference. Slope calibration is to remove variation of light intensity slope according to the control step among channels through multiplying slope difference. We can obtain an improved light intensity profile through applying offset and slope calibration simultaneously. The proposed method can help to obtain clearer image with a high precision in a machine vision inspection system.

Highly flexible, transparent and low resistance IZO-Ag-IZO multilayer electrode for flexible OLEDs

  • Cho, Sung-Woo;Choi, Kwang-Hyuk;Jeong, Jin-A;Lee, Se-Hyung;Kim, Jang-Joo;Kim, Han-Ki
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2008년도 International Meeting on Information Display
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    • pp.609-612
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    • 2008
  • Characteristics of indium-zinc-oxide (IZO)-Ag-IZO multilayer grown on a PET substrate were investigated for flexible organic emitting diodes. By inserting very thin Ag layer between amorphous IZO, IZO-Ag-IZO (IAI) multilayer anode exhibited remarkably reduced sheet resistance and high transmittance due to the surface plasmon resonance effect and Ag layer.

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완충재 종류에 따른 경량바닥충격음 저감특성 평가 (Evaluation of the Light-weight Floor Impact Sound Reduction Characteristics by Types of Resilient Material)

  • 김경우;양관섭;정진연;임정빈;정갑철
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2008년도 춘계학술대회논문집
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    • pp.830-834
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    • 2008
  • Resilient materials are generally used for the floating floors to reduce the floor impact sound. Dynamic stiffness of resilient material, which has the most to do with the floor impact sound reduction. The resilient materials available in Korea include EPS (Styrofoam), recycled urethane types, EVA (Ethylene Vinylacetate) foam rubber, foam PE (Polyethylene), glass fiber & rock wool, recycled tire, foam polypropylene, compressed polyester, and other synthetic materials. In this study, we tested floor impact sound reduction characteristic to a lot of kinds of resilient material. The result of test showed that the amount of the Light-weight impact sound reduction appeared by being influenced from this dynamic stiffness of resilient material. As the decreasing dynamic stiffness of resilient material, the impact sound reduction amount is increased, especially in the low frequency domain.

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청색 인광 유기EL 소자를 위한 wide-gap 재료의 제작 및 특성 (Properties of Wide-Gap Material for Blue Phosphorescent Light Emitting Device)

  • 전지연;한진우;서대식
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2008년도 춘계학술대회 및 기술 세미나 논문집 디스플레이 광소자
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    • pp.36-36
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    • 2008
  • Organic light-emitting device (OLED) have become very attractive due to their potential application in flat panel displays. One important problem to be solved for practical application of full-color OLED is development of three primary color (Red, Green and Blue) emitting molecule with high luminous operation. Particularly, the development of organic materials for blue electroluminescence (EL) lags significantly behind that for the other two primary colors. For this reason, Flu-Si was synthesized and characterized by means of high-resolution mass spectro metry and elemental analyses. Flu-Si has the more wide optical band gap (Eg = 3.86) than reference material (Cz-Si, Eg = 3.52 eV). We measured the photophysical and electrochemical properties of Flu-Si. The HOMO-LUMO levels were estimated by the oxidation potential and the onset of the UV-Vis absorption spectra. The EL properties were studied by the device fabricated as a blue light emitting material with FIrpic.

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유기 발광 소자에서 정공 주입 버퍼층의 효과 (Effects of Hole-Injection Buffer Layer in Organic Light-Emitting Diodes)

  • 정동희;김상걸;오현석;홍진웅;이준웅;김영식;김태완
    • 한국전기전자재료학회논문지
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    • 제16권9호
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    • pp.816-825
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    • 2003
  • Current-voltage-luminance characteristics of organic light-emitting diodes (OLEDs) were measured in the temperature range of 10 K~300 K. Indium-tin-oxide (ITO) was used as an anode and aluminum as a cathode in the device. Organic of N,N'-diphenyl-N,N'-di(m-tolyl)-benzidine (TPD) was used for a hole transporting material, and tris (8-hydroxyquinolinato) aluminum (Alq$_3$) for an electron transporting material and emissive material. And copper phthalocyanine (CuPc), poly(3,4-ethylenedi oxythiophene);poly(styrenesulfonate) (PEDOT:PSS), and poly(N-vinylcarbazole) (PVK) were used for hole-injection buffer layers. From tile analysis of electroluminescence (EL) and photoluminesccnce (PL) spectra of the Alq$_3$, the EL spectrum is more greenish then that of PL. And the temperature-dependent current-voltage characteristics were analyzed in the double and multilayer structure of OLEDS. Electrical conduction mechanism was explained in the region of high-electric and low-electric field. Temperature-dependent luminous efficiency and operating voltage were analyzed from the current-voltage- luminance characteristics of the OLEDS.

고성능 유연 발광 다이오드 소자 구현을 위한 레이저 기반 페로브스카이트 소재의 재결정화 (Laser-Induced Recrystallization of Perovskite Materials for High-Performance Flexible Light-Emitting Diode)

  • 허재찬;김지은;이동규;황윤식;우유미;이한얼;박정환
    • 한국전기전자재료학회논문지
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    • 제36권3호
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    • pp.286-291
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    • 2023
  • Perovskite materials are promising candidates for next-generation optoelectronic devices owing to their outstanding external quantum efficiency, high color purity, and ability to tune the light emission wavelength. However, conventional thermal annealing processes caused the degradation of perovskite, resulting in poor optoelectronic properties and a short lifetime. Herein, we propose a laser-induced recrystallization of perovskite thin film to enhance its light-emitting properties. Laser-induced recrystallization process was performed using rapid and instantaneous laser heating, which successfully induced grain growth of the perovskite material. The laser processing conditions were thoroughly optimized based on theoretical calculations and various material analyses such as x-ray diffraction, scanning electron microscope, and photoluminescence spectroscopy.

Study on Optical Characteristics of Nano Hollow Silica with TiO2 Shell Formation

  • Roh, Gi-Yeon;Sung, Hyeong-Seok;Lee, Yeong-Cheol;Lee, Seong-Eui
    • 한국세라믹학회지
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    • 제56권1호
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    • pp.98-103
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    • 2019
  • Optical filters to control light wavelength of displays or cameras are fabricated by multi-layer stacking process of low and high index thin films. The process of multi-layer stacking of thin films has received much attention as an optimal process for effective manufacturing in the optical filter industry. However, multi-layer processing has disadvantages of complicated thin film process, and difficulty of precise control of film morphology and material selection, all of which are critical for transmittance and coloring effect on filters. In this study, the composite $TiO_2$, which can be used to control of UV absorption, coated on nano hollow silica sol, was synthesized as a coating material for optical filters. Furthermore, systematic analysis of the process parameters during the chemical reaction, and of the structural properties of the coating solutions was performed using SEM, TEM, XRD and photo spectrometry. From the structural analysis, we found that the 85 nm nano hollow silica with 2.5 nm $TiO_2$ shell formation was successfully synthesized at proper pH control and titanium butoxide content. Photo luminescence characteristics, excited by UV irradiation, show that stable absorption of 350 nm-light, correlated with a 3.54 eV band gap, existed for the $TiO_2$ shell-nano hollow silica reacted with 8.8 mole titanium butoxide solution. Transmittance observed on substrate of the $TiO_2$ shell-nano hollow silica showed effective absorption of 200-300 nm UV light without deterioration of visible light transparency.