• Title/Summary/Keyword: Solar cell

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A study of the electrical characteristics changes of PV cell at high temperature (태양전지 셀의 고온에 의한 전기적 특성 변화 연구)

  • Jung, Tae-Hee;Shin, Jun-Oh;Kim, Tae-Bum;Kang, Gi-Hwan;Ahn, Hyung-Keun;Han, Deuk-Young
    • 한국신재생에너지학회:학술대회논문집
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    • 2009.11a
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    • pp.387-389
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    • 2009
  • PV module is manufactured by several steps such as cell sort, tabbing & string, lay-up, lamination processes. In oder to manufacture PV module, solar cell must be placed in high temperature. Soldering Process in high temperature is important because it directly influences electric output performance changes of solar cell in solar cell module. We consider applying momentary high temperature, while soldering solar cell, and expect change electric characteristics of PV module. In this paper, we measure electric output characteristics of solar cells after those are applied with high temperature changes for two seconds. From these results, we confirm with application of high temperature, $I_{sc}$ increase and $V_{oc}$ slightly decreases.

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Influence of the Thickness and Doping Concentration in p- and n-Type Poly-Si Layers on the Efficiency of a Solar Cell Based on a Carbon Fiber

  • Yoon, Min-Seok;Shim, Young Bo;Han, Young-Geun
    • Journal of the Optical Society of Korea
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    • v.19 no.2
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    • pp.199-205
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    • 2015
  • We investigated the effects of the thickness and doping concentration in p- and n-type poly-Si layers on the performance of a solar cell based on a carbon fiber in order to improve the energy conversion efficiency of the cell. The short-circuit current density and open-circuit voltage of the carbon fiber-based solar cell were significantly influenced by the thickness and doping concentration in the p- and n-type poly-Si layers. The solar cell efficiency was successfully enhanced to ~10.5%.

Developing Sealing Material of a Dye-Sensitized Solar Cell for Outdoor Power (실외 발전을 위한 염료감응형 태양전지의 봉지재 개발)

  • Ki, Hyun-Chul;Hong, Kyung-Jin
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.29 no.12
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    • pp.819-823
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    • 2016
  • DSSC (dye-sensitized solar cell) is expected to be one of the next-generation photovoltaics because of its environment-friendly and low-cost properties. However, commercialization of DSSC is difficult because of the electrolyte leakage. We propose thermal curable base on silicon resin and apply a unit cell and large area ($200{\times}200mm$) dye-sensitized solar cell. The resin aimed at sealing of DSSC and gives a promising resolution for sealing of practical DSSC. In result, the photoelectric conversion efficiency of the unit cell and the module was 6.63% and 5.49%, respectively. In the durability test result, the photoelectric conversion efficiency of the module during 500, 1,000, 1,500 and 2,000 hours was 0.73%, 0.73%, 1.82% and 2.36% respectively. It was confirmed that the photoelectric conversion efficiency characteristics are constant. We have developed encapsulation material of thermal curing method excellent in chemical resistance. A sealing material was applied to the dye-sensitized solar cell and it solved the problem of durability the dye-sensitized solar cell. Sealing material may be applied to verify the possibility of practical application of the dye-sensitized solar cell.

무전해 도금을 적용한 결정질 실리콘 태양전지의 효율 향상

  • Jeong, Myeong-Sang;Jang, Hyo-Sik;Song, Hui-Eun;Gang, Min-Gu
    • Proceedings of the Korean Vacuum Society Conference
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    • 2013.02a
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    • pp.686-686
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    • 2013
  • Crystalline silicon solar cell is a semiconductor device that converts light into electrical energy. Screen printing is commonly used to form the front/back electrodes in silicon solar cell. Screen printing method is convenient but usually shows high resistance and low aspect ratio, which cause the efficiency decrease in crystalline silicon solar cell. Recently the plating method is applied in c-Si solar cell to reduce the resistance and improve the aspect ratio. In this paper, we investigated the effect of additional electroless Ag plating into screen-printed c-Si solar cell and compared their electrical properties. All wafers used in this experiment were textured, doped, and anti-reflection coated. The electrode formation was performed with screen-printing, followed by the firing step. Aften then we carried out electroless Ag plating by changing the plating time in the range of 20 sec~5 min and light intensity. The light I-V curve and optical microscope were measured with the completed solar cell. As a result, the conversion efficiency of solar cells was increased mainly due to the decreased series resistance.

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A Study on the Fixed-Concentrating Hybrid Panel using Reflector (반사판을 이용한 고정식 집속형 복합 Panel에 대한 연구)

  • Kim, Kiu-Jo;Kim, Wan-Tae;Lee, Tae-Ho;Yoo, Hung-Chul;Huh, Chang-Su
    • Journal of the Korean Solar Energy Society
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    • v.21 no.2
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    • pp.1-8
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    • 2001
  • The most effective methods for utilizing solar energy are to use the sunlight and solar thermal energy such as hybrid panel simultaneously and to use concentrator. From such a view point systems using various kinds of photovoltaic panels are constructed in the world. However, there has not been a hybrid panel with a concentrator. If the sunlight is concentrated on solar cell, cell conversion efficiency increases and the temperature of the solar cell s increases. As the temperature of the solar cells increases, the cell conversion efficiency gradually decreases. For maintaining the cell conversion efficiency constant, it is necessary to keep solar cell at low temperature. In this paper, after designing a concentration rate for concentrating, we propose a model for cooling the cell and for using wasted heat. And, we compare it with conventional panels after calculating the electrical and thermal efficiency, using the energy balance equation.

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Performance Evaluation of Fixed-concentrated Photovoltaic/Thermal Hybrid Panel using Reflector (반사판을 이용한 고정식 집속형 태양광.열복합패널의 성능평가)

  • Seo, Yu-Jin;Huh, Chang-Su
    • Journal of the Korean Solar Energy Society
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    • v.25 no.4
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    • pp.85-92
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    • 2005
  • One of the most effective methods for utilizing solar energy is to combine thermal solar and optical energy simultaneously using a hybrid panel. Many systems using various kinds of photovoltaic panels have already been constructed. But utilizing solar energy by means of a hybrid panel with concentrator has not been to be attempted yet. Normally if sunlight is directed on the solar cell, and there is no increase in temperature, the absorption energy of each cell will increase per unit area. In a silicon solar cell. however, cell conversion efficiency decreases according to the increasing temperature. Therefore, to maintain cell conversion efficiency under normal condition, it is necessary to keep the cell at operating temperature. we design and make new hybrid panel with cooling system to prevent increasing of temperature on cell, collect effectively thermal energy. We compared performance of new hybrid panel with PV module and thermal panel. We also evaluated conversion efficiency, electric power and thermal capacity and confirmed cooling effect from thermal absorption efficiency.

Thin film solar cell efficiency improvement using the surface plasmon effect (표면 플라즈몬 효과를 이용한 박막형 태양전지 효율향상)

  • Byun, Soo-Hwan;Soh, Hyun-Jun;Yoo, Jeong-Hoon
    • Transactions of the Society of Information Storage Systems
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    • v.8 no.2
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    • pp.39-43
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    • 2012
  • In spite of many advantages, the practical application of the thin film solar cell is restricted due to its low efficiency compared with the bulk type solar cells. This study intends to adopt the surface plasmon effect using nano particles to solve the low efficiency problem in thin film solar cells. By inserting Ag nano-particles in the absorbing layer of a thin film solar cell, the poynting vector value of the absorbing layer is increased due to the strong energy field. Increasing the value may give thin film solar cells chance to absorb more energy from the incident beam so that the efficiency of the thin film solar cell can be improved. In this work, we have designed the optimal shape of Ag nano-particle in the absorbing laser of a basic type thin film solar cell using the finite element analysis commercial package COMSOL. Design parameters are set to the particle diameter and the distance between each Ag nano-particle and by changing those parameters using the full factorial design variable set-up, we can determine optimal design of Ag nano-particles for maximizing the poynting vector value in the absorbing layer.

A study on AC 220V common power supply system using large area DSC module with Ag grid (대면적 Ag 그리드 DSC 모듈을 활용한 AC 220V 상용 전원장치에 대한 연구)

  • Kim, Hee-Je;Seo, Hyun-Woong;Kim, Mi-Jeong;Hong, Ji-Tae;Sim, Ji-Young;Lee, Sang-Mok;Kim, Ho-Sung
    • 한국신재생에너지학회:학술대회논문집
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    • 2007.06a
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    • pp.254-256
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    • 2007
  • The Solar energy is either used as a solar thermal energy or converted to electrical power through power conversion system. The latter method is defined as a solar cell changing the solar energy into the direct electric energy or power conversion that convert the dc power into ac power.For the solar cell to be a practical alternative energy, the study should be focused not only on the solar cell ,but also the power conversion system for common power source. In this study, we get the suitable power to common load ,using Ag Grid DSC(Dye-sensitized solar cell). Our purpose is to achieve the common solar cell power generation system ,using converter and PWM(Pulse width modulation) inverter system controled by DSP.

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ZnO nanoparticles with different concentrations inside organic solar cell active layer

  • Saravanan, Shanmugam;Ismail, Yasser A.M.;Silambarasan, Murugesan;Kishi, Naoki;Soga, Tetsuo
    • Advances in Energy Research
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    • v.4 no.4
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    • pp.275-284
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    • 2016
  • In the present work, ZnO nanoparticles (NPs) have been dispersed alone in the same solvent of the active layer for improving performance parameters of the organic solar cells. Different concentrations of the ZnO NPs have been blended inside active layer of the solar cell based on poly(3-hexylthiophene) (P3HT), which forms the hole-transport network, and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM), which forms the electron-transport network. In the present investigations, the ZnO NPs may represent an efficient tool for improving light harvesting through light scattering inside active layer, electron mobility, and electron acceptance strength which tend to improve photocurrent and performance parameters of the investigated solar cell. The fill factor (FF) of the ZnO-doped solar cell increases nearly 14% compared to the non-doped solar cell when the doping is 50%. The present investigations show that ZnO NPs improve power conversion efficiency of the solar cell from 1.23% to 1.64% with increment around 25% that takes place after incorporation of 40% as a volume ratio of the ZnO NPs inside P3HT:PCBM active layer.

Performance of Crystalline Si Solar Cells with Temperature Controlled by a Thermoelectric Module (열전소자 온도조절법을 이용한 결정형 실리콘 태양전지의 성능 측정)

  • Heo, Kimoo;Lee, Daeho;Lee, Jae-Heon
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.27 no.7
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    • pp.375-379
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    • 2015
  • A proper estimate of solar cell efficiency is of great importance for the feasibility analysis of solar cell power plant development. Since solar cell efficiency depends on temperature, several methods have been introduced to measure it by operating temperature modulation. However, the methods either rely on the external environment or need expensive equipment. In this paper, a thermoelectric module was used to control the operating temperature of crystalline silicon solar cells effectively and precisely over a wide range. The output characteristics of crystalline silicon solar cells in response to operating temperatures from $-5^{\circ}C$ to $100^{\circ}C$ were investigated experimentally. Their efficiencies decreased as the temperature rose, since the decrease in the open circuit voltage and fill factor exceeded the increase in the short circuit current. The maximum power temperature coefficient of the single crystalline solar cell was more sensitive to temperature change than that of the polycrystalline solar cell.