• Title/Summary/Keyword: Solar panels

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Reliability of Metal Electrode for Flexible Electronics (유연성 소자용 금속 전극의 신뢰성 연구 동향)

  • Kim, Byoung-Joon
    • Journal of the Microelectronics and Packaging Society
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    • v.20 no.4
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    • pp.1-6
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    • 2013
  • Recently, various types of flexible devices such as flexible displays, batteries, e-skins and solar cell panels have been reported. Most of the researches focus on the development of high performance flexible device. However, to realize these flexible devices, the long-term reliability should be guaranteed during the repeated deformations of flexible devices because the direct mechanical stress would be applied on the electronic devices unlike the rigid Si-based devices. Among various materials consisting electronics devices, metal electrode is one of the weakest parts against mechanical deformation because the mechanical and electrical properties of metal films degrade gradually due to fatigue damage during repeated deformations. This article reviews the researches of fatigue behavior of thin metal film, and introduces the methods to enhance the reliability of metal electrode for flexible device.

Research Trends in Powder Materials for Solution-based Transparent Conducting Electrode (용액기반 투명전극 분말 재료 연구 동향)

  • Koo, Bon-Ryul;Ahn, Hyo-Jin
    • Journal of Powder Materials
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    • v.24 no.2
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    • pp.153-163
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    • 2017
  • Transparent conducting electrodes (TCEs) are attracting considerable attention as an important component for emerging optoelectronic applications such as liquid crystal displays, touch panels, and solar cells owing to their attractive combination of low resistivity (<$10^{-3}{\Omega}cm$) and high transparency (>80%) in the visible region. The solution-based process has unique properties of an easy fabrication procedure, scalability, and low cost compared to the conventional vacuum-based process and may prove to be a useful process for fabricating TCEs for future optoelectronic applications demanding large scale and flexibility. In this paper, we focus on the introduction of a solution-based process for TCEs. In addition, we consider the powder materials used to fabricate solution-based TCEs and strategies to improve their transparent conducting properties.

Strength properties of matrix according replacment ratio by polysilicon sludge and active loess cement (활성황토 시멘트와 폴리실리콘 슬러지 치환율에 따른 경화체의 강도 특성)

  • Kang, Jeon-Wook;Lee, Won-Gyu;Kim, Dea-Yeon;Sin, Jin-Hyun;Lee, Sang-Soo
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2018.05a
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    • pp.265-266
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    • 2018
  • In recent years, active loess cement has been used instead of cement in order to reduce the amount of cement and industrial byproducts that are the main cause of environmental pollution. We also used polysilicon sludge as a by-product to reduce the amount of cement used and to improve the environmental pollution due to the reduction of carbon dioxide. Polysilicon is a raw material used in the production of panels for solar power generation. When producing 1 ton of polysilicon, 2 tons of sludge is generated. It is an experiment to reduce sludge treatment and cement usage. This study analyzed basic characteristics of polysilicon sludge and active loess cement according to replacment ratio.

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DYNAMIC ANALYSIS OF A MECHANICAL SYSTEM WITH FLEXIBLE BODIES (유연성을 가진 기계 시스템의 동역학 해석)

  • Park, T.W.;Seo, J.H.;Chung, W.S.;Chae, J.S.;Seo, H.S.
    • Proceedings of the KSME Conference
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    • 2001.06b
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    • pp.422-427
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    • 2001
  • The component mode synthesis method allows the elastic deformation of each component in the flexible multibody system by a sum of modes and modal coordinates. This paper focuses on the selection of boundary conditions and deformation modes for redundantly constrained flexible components in mechanical system dynamics. The result of a flexible body dynamic analysis with only normal modes is used to identify proper boundary conditions of a static modes and a desired set of static modes which will be used in the final model. A simple four bar mechanism is used to explain the procedure and a space satellite with solar panels is analyzed using the proposed method.

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Multitasking Façade: How to Combine BIPV with Passive Solar Mitigation Strategies in a High-Rise Curtain Wall System

  • Betancur, Juan
    • International Journal of High-Rise Buildings
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    • v.6 no.4
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    • pp.307-313
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    • 2017
  • This paper outlines the processes and strategies studied and selected by the team during the design stages of the project for the incorporation of BIPV into the tower's façade. The goal was to create a system that helps reduce internal heating and cooling loads while collecting energy through photovoltaic panels located throughout the building. The process used to develop this façade system can be broken down into three stages. 1. Concept: BIPV as design catalyst for a high-rise building. 2. Optimization: Balancing BIPV and Human comfort. 3. Integration: Incorporating BIPV into a custom curtain wall design. The FKI Project clearly illustrates the evolution building enclosures from simple wall systems to high performance integrated architectural and engineering design solutions. This design process and execution of this project represent the design philosophy of our firm.

A Parallel Operation of DC/DC Converter for suitable Photovoltaics System (태양광 발전에 적합한 DC/DC 컨버터의 병렬운전)

  • Kim Byeong-Woo;Park Sung-Jun;Moon Chae-Ju;Nam Hae-Kon;Kim Cheul-U;Kim Jong-Dal
    • Proceedings of the KIEE Conference
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    • summer
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    • pp.1498-1500
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    • 2004
  • A novel technique for efficiently extracting maximum power from PV panels is proposed, consisting of a modified buck-boost converter, witch is controlled by a DSP. A variation of the proposed MPPT technique is directly use the modified buck-boost converter current reference as a control parameter. Also 4 parallel boost converters have division of load. A theoretical analysis of the proposed converter is performed and compared with experimental results obtained from a 1k[W] prototype solar panel under a controlled experimental setup.

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I-V Properties OLED by CMP Process (CMP 공정을 적용한 유기발광소자의 전압.전류 특성)

  • Choi, Gwon-Woo;Lee, Woo-Sun;Jun, Young-Kil;Jueng, Pan-Gum;Seo, Yong-Jin
    • Proceedings of the KIEE Conference
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    • 2006.07c
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    • pp.1357-1358
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    • 2006
  • Indium tin oxide (ITO) thin film is a transparent electrode, which is widely applied to solar battery, illuminators, optical switches, liquid crystal displays (LCDs), plasma display panels (PDPs), and organic light emitting displays (OLEDs) due to its easy formation on glass substrates, goof optical transmittance, and good conductivity. ITO thin film is generally fabricated by various methods such as spray, CVD, evaporation, electron gun deposition, direct current electroplating, high frequency sputtering, and reactive DC sputtering. However, some problems such as peaks, bumps, large particles, and pin-holes on the surface of ITO thin film were reported, which caused the destruction of color quality, the reduction of device life time, and short-circuit. Chemical mechanical polishing (CMP) processis one of the suitable solutions which could solve the problems.

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Dynamic analysis of a flexible multibody system

  • Chae Jang-Soo;Park Taw-Won;Kim J.
    • International Journal of Precision Engineering and Manufacturing
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    • v.6 no.4
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    • pp.21-25
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    • 2005
  • In the dynamic analysis of a mechanism, if one or more of the components are flexible, then the simulation will not be accurate because of the violation of the rigid body assumption. Mode shapes are used to represent the dynamic behavior of an elastic structure. A modal synthesis method which uses a combination of normal modes, constraint modes, and attachment modes, was used to represent effectively the elastic deformation of a flexible multibody. Since the combination of these modes should be different for each type of connecting part, the modal synthesis method was studied for the various types of interconnecting joints. In addition, the analysis procedure for the flexible body was explained. A satellite system with flexible solar panels was chosen as an example to show the effectiveness of the proposed method.

Efficiency Improvement for Building Integrated Photovoltaic Applied to High-rise Building (고층 빌딩에 적용되는 빌딩통합형 태양광패널 효율성 개선방안)

  • Lee, Do-Hyun;Ahn, Ihn-Seok
    • Journal of the Korean Society of Industry Convergence
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    • v.25 no.1
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    • pp.71-78
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    • 2022
  • With the advent of cutting-edge technology, renewable energy is significantly considered as alternative resources to supply electric power. However, many barriers such as energy intermittency, high initial installation cost, and low-efficiency generation challenged building new infrastructure with clean energy. Efforts reducing greenhouse gas emissions and reliance on fossil fuels resulted in the decentralization of power generation like distributed energy resource (DER). This paper is to introduce and evaluate the feasibility of building-integrated photovoltaics (BIPV) in a high-rise building in Ulsan. To optimize BIPV, a variety of methods to minimize efficiency decrease and maximize electric power generation after installing BIPV on the building's facade are suggested. The variables causing power losses are analyzed. By utilizing System Advisor Model (SAM), actual power generated from solar panels is measured by Thin-film PV, Mono-crystalline PV, and Poly-crystalline PV.