• Title/Summary/Keyword: Solar cell

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The New Modeling of Solar Cell for Virtual Implement Of Solar Cell (태양전지 가상구현 장치를 위한 새로운 태양전지 모델링에 관한 연구)

  • Lee B. I.;Ryu T. G.;Han J. M.;Choe G. H.
    • Proceedings of the KIPE Conference
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    • 2002.11a
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    • pp.69-73
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    • 2002
  • A study on photovoltaic system has a lot of problems. Such as repetition experiment in the same condition, development of MPPT(Maximum Power Point Tracking) algorithm, development of islanding detection algorithm and so forth. The reason Is that solar cell output characteristics are varied by insolarion and surface temperature of solar cell. Therefore, the assistance equipment is required which emulates the solar cell characteristics. In this paper, propose the new modeling of solar cell and verify this modeling using MATLAB simulation. And experiment virtual implement of solar cell system using this modeling.

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Technology for Efficiency Enhancement of Crystalline Si Solar Cell using Nano Imprint Process (나노 임프린트 공정을 이용한 결정형 실리콘 태양전지 효율 향상 기술)

  • Cho, Young Tae;Jung, Yoon Gyo
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.12 no.5
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    • pp.30-35
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    • 2013
  • In order to increase cell efficiency in crystalline silicon solar cell, reduction of light reflection is one of the essential problem. Until now silicon wafer was textured by wet etching process which has random patterns along crystal orientation. In this study, high aspect ratio patterns are manufactured by nano imprint process and reflectance could be minimized under 1%. After that, screen printed solar cell was fabricated on the textured wafer and I-V characteristics was measured by solar simulator. Consequently cell efficiency of solar cell fabricated using the wafer textured by nano imprint process increased 1.15% than reference solar cell textured by wet etching. Internal quantum efficiency was increased in the range of IR wave length but decreased in the UV wavelength. In spite of improved result, optimization between nano imprinted pattern and solar cell process should be followed.

Edge Isolation Effects on Silicon Solar Cells using a Laser Scribing Process (레이저 스크라이빙 공정을 이용한 실리콘 태양전지의 측면분리 효과)

  • Joo, Jae-Hong;Jung, Soon-Won;Kim, Kwang-Ho
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.66 no.5
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    • pp.851-856
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    • 2017
  • Research on the edge isolation process of typical polycrystalline silicon solar cells was carried out using laser scribing equipment. The voltage-current characteristics of the solar cell before and after laser scribing were analyzed using a solar simulator. Current density and efficiency increased as the fill factor of the solar cell remained constant after the laser scribing process. The efficiency of the solar cell can be increased in a short time by the edge isolation process performed via a laser scribing process. The polycrystalline silicon solar cell was made into a series electrode, and the efficiency of the solar cell increased because the width of the solar cell was narrowed and the active region was widened by the laser scribing process.

A study on characteristic transmission-reflection by environmental change of solar cell (태양전지셀의 환경변화에 따른 투과-반사특성 연구)

  • Shin, Sang-Wuk;Lee, Se-Hyun;Cho, Mee-Ryoung;Hwang, Myung-Keun
    • 한국신재생에너지학회:학술대회논문집
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    • 2006.06a
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    • pp.233-236
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    • 2006
  • In this paper, I try to measure characteristic transmission-reflection by environmental change or solar cell. I keep my eye on the characteristics variation of solar cell as environmental change. As a result, A variation caused by voltage by an effect on the efficiency of solar PV cell. Hence, it is an important variable when a designer plan to make a solar cell.

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STUDY ON THE HIGH EFFICIENCY BURIED CONTACT SOLAR CELL WITH WET ETCHING PROCESS

  • Kang, Dae-Keun;Choi, Kang-Ho;Lee, Joo-Yul;Lee, Kyu-Hwan
    • Proceedings of the Korean Institute of Surface Engineering Conference
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    • 2009.10a
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    • pp.156-156
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    • 2009
  • High efficiency silicon solar cell technology based on planar technology has been improved by various kinds of process by using the wet etching process. In particular, the buried contact solar cell has been successfully studied. In the present work, a simplified process of the buried contact solar cell has been suggested to help one design effectively the high-efficiency solar cell.

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A Study on the Near Infrared Ray Wavelength Conversion Film for Improving Conversion Efficiency of Solar Cell (태양전지 변환 효율 향상을 위한 근적외선 파장 변환 필름에 관한 연구)

  • Park, Byung Kyu;Park, Gye Choon;Lee, Jin
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.30 no.11
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    • pp.699-704
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    • 2017
  • The amount of electric power for photovoltaic power generation depends on the location of the power plant and the direction of solar cell. The solar cell controls the generation of solar power plants. Therefore, the structure of solar cell, manufacturing method, and optic technology were factors contributing to increased solar cell efficiency; however, the technical limit has been reached. Herein, we propose a new method to increase the solar cell efficiency using a wavelength conversion technology that converts ultraviolet and infrared rays, which are not effectively used in solar cells, into effective wavelength of solar cell. We used fluoride $Na(Ca)YF_4$ phosphor for wavelength conversion. Then, a wavelength-conversion fluorescent paste, prepared using an organic-silicon binder, was used to prepare a film that was applied to Si solar cells. It was confirmed that conversion efficiency improved by 5% or more.

Performance Measurement Method of Several Types of Photovoltaic Module Depending on Efficiency (고효율 태양전지모듈의 성능측정 방법)

  • Kim, Kyung-Soo;Kang, Gi-Hwan;Yu, Gwon-Jong;Yoon, Soon-Gil
    • Journal of the Korean Solar Energy Society
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    • v.31 no.1
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    • pp.93-99
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    • 2011
  • To guarantee more exact maximum power of solar cell module, it is absolutely required to have performance characteristics of various solar cells. Today, there are many types of solar simulator for large area measurement. But it is very opaque how to select the best one for various solar cell module like crystalline silicon solar cell, high efficiency solar cell, amorphous silicon thin film solar cell, CdTe and CIGS solar cell module. So, in this paper 4 types of photovoltaic module were selected to compare the electrical characteristics by changing light pulse duration time and voltage scan direction. Light pulse duration time was varied from 10msec to 800msec. And two types of voltage scan directions, Voc->Isc and Isc->Voc were selected. From this results, optimum measuring condition was suggested and electrical variation was analysed for each types of solar cell module. The detail description is specified as the following paper.

Study on the tree-mimic array of solar cell modules (수목형상에 따른 태양전지 모듈의 배열 연구)

  • Kim, Ki-Hyun;Yun, Rin
    • Journal of the Korean Solar Energy Society
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    • v.31 no.6
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    • pp.32-39
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    • 2011
  • This study is about the installation of the solar cell modules. The solar cell modules are built by the tree-mimic structure, and the performance is compared with that of the flat-plate type solar cell module installation. The mathematical tree model, which was suggested by Fisher and Honda, is utilized to determine the location of the solar cell modules for the tree-mimic type. The experiment shows that the generated electric power of the flat-plate type is higher than that of the tree-mimic type by 30% for one month of July. This lower performance for the tree-mimic type comes from the shading effects among the solar cell modules. The theoretical calculation for the absorbed solar radiation on the two types of solar cell installation shows that the tree-mimic type is higher than the flat-plate type by 8.5%. The shading area for the tree-mimic model is calculated with time by using the 3D-CAD, which will be utilized for the optimization of the tree-mimic model in the future.

A study of Comparative Analysis of CPV and PV Module through Long-term Outdoor Testing (장기 Outdoor Test를 통한 CPV와 PV 모듈의 발전량 비교분석)

  • Kim, Minsu;Lee, Yuri;Cho, Minje;Oh, Soo Young;Jung, Jae Hak
    • Current Photovoltaic Research
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    • v.5 no.1
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    • pp.33-37
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    • 2017
  • Today, photovoltaic power generation mostly uses Si crystalline solar cell modules. The most vulnerable part of the Si solar cell module is that the power generation decreases due to the temperature rise. But, it is widely used because of low installation cost. In the solar market, where Si crystalline solar cell modules are widely used. The CPV (Concentrated Photovoltaic) module appeared in the solar market. The CPV module reduces the manufacturing cost of the solar cell by using non-Si in the solar cell. Also, there is an advantage that a rise in temperature does not cause a drop in power generation. But this requires high technology to install and has a disadvantage that the initial installation cost is expensive compared to normal Si solar cell module. So that we built a testbed to see these characteristics. The testbed was used to measure the amount of power generation in a long-term outdoor environment and compared with the general Si solar cell module.

Analysis of New Solar Cell Model for the Virtual Implemented Solar Cell System (가상구현 태양전지 시스템을 위한 태양전지의 새로운 모델링)

  • Jeong, Byung-Hwan;Kang, Byoung-Hee;Lee, Myung-Un;Choe, Gyu-Ha
    • The Transactions of the Korean Institute of Power Electronics
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    • v.11 no.1
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    • pp.79-89
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    • 2006
  • Particularly the photovoltaic systems are preferred because the output is extracted to the useful electric energy. However, the output characteristics of photovoltaic(PV) systems using solar cell or array depend on the weather conditions. The assistant equipment which emulates the solar cell characteristics that can be controlled arbitrarily by researcher is required to the researchers for reliable experimental data. To solve these problems, it is necessary to research a solar cell model of which output characteristics varied by setting the weather conditions such as insolation levels and temperatures. Therefore, this paper was presented that improved model which is based on interpolation model. To verified the improved model, it is confirmed using the simulation of MATLAB. Also, the experiment was performed by the characteristics of virtual implemented solar cell(VISC) system with the proposed solar cell model. It could be confirmed that there exists actual ewer within 5% between actual solar cell and VISC system.