• Title/Summary/Keyword: Solar cell

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Effects of the Incidence Angle and Temperature on the Performance of a Thin-Film CIGS Solar Cell for Solar Powered UAVs (태양광무인기를 위한 박막형 태양전지의 입사각 및 온도에 따른 성능분석)

  • Shin, Donghun;Kim, Tae Ho
    • 한국신재생에너지학회:학술대회논문집
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    • pp.55.2-55.2
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    • 2011
  • This research aims to study the effects of the incidence angle and surface temperature on the power generation performance of a thin-film CIGS solar cell for solar powered unmanned aerial vehicles (UAVs). The test rig consists of a unit CIGS solar cell is installed on a table whose angle is controlled manually. A K-type thermocouple is attached to the solar cell surface for temperature measurements. A solar module analyzer measures the voltage and current generated from the test solar cell. The solar module analyzer also calculates the maximum solar power and efficiency of the solar cell. All test data are acquired in a PC. Test results show that the solar cell efficiency decreases significantly with increasing incidence angle and increasing surface temperature in general. As the incidence angle increases from 0 degree to 90 degree, the solar cell efficiency decreases by 60%. The solar cell efficiency decreases by 10% with increasing solar cell surface temperature from $20^{\circ}C$ to $30^{\circ}C$, for exmaple. The direct cooling method of the solar cell using dry ice decreases dramatically the solar cell surface temperature, thus increasing the solar cell efficiency by 15%.

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Effect of Solar Cell Cover Glass on Solar Cell Performance (태양전지 보호유리가 태양전지 성능에 미치는 영향)

  • Choi, Young-Jin;Wang, Jin-Suk
    • Proceedings of the KIEE Conference
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    • pp.1421-1423
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    • 1996
  • In this study, the effect of solar cell cover glass on the solar cell performance is evaluated. Silicon solar cell (active area:4*6cm, efficiency:12.6% at AMO condition) is used for this study. ITO(Indium tin Oxide) film thickness of the ITO/AR/substrate glass/solar cell structure samples are $40{\AA}$, $60{\AA}$, $160{\AA}$, $240{\AA}$ respectively. The solar cell maximum output power on the stacking structure variations showed 465mW in the AR/ITO/substrate glass/solar cell, and minimum output power showed 403mW in the AR/substrate glass/solar cell. The maximum output power of the solar cell on the ITO thickness variations of the ITO/AR/substrate glass/solar cell showed 460mW at $40{\AA}$ then decrease output power as ITO thickness increase. For environment tests, all samples are exposed UV light in the vacuum chanber. The output power degradation of AR(UVR)/substrate glass/solar cell stacking structure is small compared with ITO/AR(UVR)/substrate glass/solar cell stacking structure.

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Perovskite solar cell (페로브스카이트 태양전지)

  • Lee, Jin-Wook;Park, Nam-Gyu
    • Vacuum Magazine
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    • v.1 no.4
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    • pp.10-13
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    • 2014
  • Since the development of 9.7% efficient long-term stable solid state perovskite solar cell in 2012, intensive study on perovskite solar cell has been performed. As a result, power conversion efficiency (PCE) has reached 20.1%. In-dept study on perovskite light absorber enabled understanding of origin of superb photovoltaic performance of perovskite solar cell. In this article, historical evolutions of perovskite solar cell along with key physical properties enabling high PCE are presented. Several important results for development of high efficiency perovskite solar cell are introduced. Finally, in-present research issues and future direction for solving these issues are discussed.

단결정 태양전지의 최적운전을 위한 전압-전류, 특성

  • Hong, Chang-U;Choe, Yong-Seong;Lee, Gyeong-Seop
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.10-10
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    • 2010
  • The solar cell energy is considered as a clean energy source in the world. However, because the output of solar cell is not constant, it needs to study the relationships of the DC voltage, the DC current and the DC power of the solar cell. This paper presents the solar cell output characteristics and the maximum power point of the solar cell under different irradiation conditions.

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A Study on the Parameter Estimation of Solar Cell Module (태양전지 모듈의 파라미터 추정에 관한 연구)

  • Kim, Tae-Yeop;Lee, Yun-Gyu;An, Ho-Gyun
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.51 no.2
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    • pp.92-98
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    • 2002
  • It is necessary to measure the solar cell parameter fur understanding characteristic of solar cell and applying to many other fields. Since photovoltaic system consists of solar cell module, which are connected each other in series and parallel, it is not proper to apply a solar cell parameter to photovoltaic system. Therefore, to estimate the solar tell module and to solve the problem of the established algorithm is on demand. In this paper the authors have improved the accuracy of solar cell module Parameter estimation by compensating series and Parallel resistance, and developed a new parameter estimation algorithm, which can be applied to photovoltaic system without high cost measuring equipment. And the validity of proposed algorithm is verified by the simulation and experimentation.

Analysis of Series and/or Parallel Converter for V-I Output Characteristics of Solar Cell

  • Yoo J.-H.;Han J.-M.;Ryu T.-G.;Gho J.-S.;Choe G.-H.;Chae Y.-M.
    • Proceedings of the KIPE Conference
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    • pp.639-643
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    • 2001
  • Recently, photovoltaic system has been studied widely as a renewable energy system, because it does not produce environmental pollution and it has infinity energy source from the sun. A study on photovoltaic system has a lot of problems like as reappearance and repetition of some situation in the laboratory experiment for development of MPPT algorithm and islanding detection algorithm, because output characteristics of solar cell are varied by irradiation and surface temperature of solar cell. And this system is consisted a lot of solar cell unit. Therefore, the assistant equipment which emulates the solar cell characteristics which can be controlled arbitrarily by researcher is require to the researchers for reliable experimental data. In this paper, the virtual implement of solar cell (VISC) system is proposed to solve these problems and to achieve reliable experimental result on photovoltaic system. VISC system emulates the solar cell output characteristics, and this system can substitute solar cell in laboratory experiment system. To realize the VISC, mathematical model of solar cell is studied for driving converter and the DC/DC converters are compared in viewpoint of tracking error using computer simulation. And then analysis of parallel and series characteristics was done for combination of VISC model.

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Analysis of PWM Converter for V-I Output Characteristics of Solar Cell

  • Han, Jeong-Man;Jeong, Byung-Hwan;Gho, Jae-Seok;Choe, Gyu-Ha
    • Journal of Power Electronics
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    • v.3 no.1
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    • pp.62-67
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    • 2003
  • Recently, photovoltaic system has been studied widely as a renewable energy system, because it does not produce environmental pollution and it has infinity energy source from the sun. A study on photovoltaic system has a lot of problems like as reappearance and repetition of some situation in the laboratory experiment for development of MPPT algorithm and islanding detection algorithm. because output characteristics of solar cell are varied by irradiation and surface temperature of solar cell. Therefore, the assistant equipment which emulates the solar cell characteristics which can be controlled arbitrarily by researcher is require to the researchers for reliable experimental data. In this paper, the virtual implement of solar cell (VISC) system is proposed to solve these problems and to achieve reliable experimental result on photovoltaic system. VISC system emulates the solar cell output characteristics, and this system can substitute solar cell in laboratory experiment system. To realize the VISC, mathematical model of solar cell is studied for driving converter and the DC/DC converters are compared in viewpoint of tracking error using computer simulation. Output dynamic characteristic of PV array is varied by irradiation and PWM converter performance is studied using PSIM simulator.

Polymer Tandem Solar Cell Having $TiO_2$ Nanoparticle Interlayer

  • Chung, Won-Suk;Lee, Hyun-Jung;Lee, Won-Mok;Ko, Min-Jae;Park, Nam-Gyu;Ju, Byeong-Kwon;Kim, Kyung-Kon
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.1200-1203
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    • 2009
  • A solution processed polymer tandem cell has been fabricated by using the organic layer coated crystalline $TiO_2$ nanoparticle inter layer. The highly dispersive OL-$TiO_2$ has several advantages in terms of excellent film forming property, crystallinity, optical transparency, and well defined chemical composition. The surface morphology of the $TiO_2$ thin film was found to play a crucial role in the performance of the polymer tandem cell. The stability of the tandem cell, utilizing dense $TiO_2$ nanoparticles inter layer, was superior to the stability of the single junction cell.

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Efficiency improvement of solar cell by back surface field (이면전계(BSF)에의한 solar cell의 효율개선효과)

  • 소대화;강기성;박정철
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.88-90
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    • 1990
  • In this study, PN junction solar cell and P$\^$+/-N-N$\^$+/ BSF solar cell, using N-type(111), 10$\^$16/[atoms/cm$\^$-3/] wafer, were fabricated applying that ion implant method whose dose are 1E14, 1E15, 3E15 and its acceleration energy is 50Key, 100Key respectively. The impurity concentration of two types of front-side are 10$\^$18/[atoms/cm$\^$-3/] and back-side concentration for BSF solar cell is 10$\^$17/[atoms/cm$\^$-3/]. As a result of comparison for 2 typical types of cells out of various fabricated samples, open circuit voltage (Voc), short circuit current(Isc) of BSF solar cell are larger than those of PN solar cell by 48[%], 14[%]. Considering that the efficiency of BSF cell is 2.5[%] as well as PN solar cell's is 7.5[%], 10.0[%] of efficiency improvement effect can be obtained from BSF solar cell. Futhermore, in consequence of front-side impurity concentration change from 10$\^$17/[atoms/cm$\^$-3] to 10$\^$20/[atoms/cm$\^$-3/] alternately, the most ideal result can be expected when it is 10$\^$18/[atoms/cm$\^$-3/].

Dye-Sensitized Metal Oxide Nanostructures and Their Photoelectrochemical Properties

  • Park, Nam-Gyu
    • Journal of the Korean Electrochemical Society
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    • v.13 no.1
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    • pp.10-18
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    • 2010
  • Nanostructured metal oxides have been widely used in the research fields of photoelectrochemistry, photochemistry and opto-electronics. Dye-sensitized solar cell is a typical example because it is based on nanostructured $TiO_2$. Since the discovery of dye-sensitized solar cell in 1991, it has been considered as a promising photovoltaic solar cell because of low-cost, colorful and semitransparent characteristics. Unlike p-n junction type solar cell, dye-sensitized solar cell is photoelectrochemical type and is usually composed of the dye-adsorbed nanocrystalline metal oxide, the iodide/tri-iodide redox electrolyte and the Pt and/or carbon counter electrode. Among the studied issues to improve efficiency of dye-sensitized solar cell, nanoengineering technologies of metal oxide particle and film have been reviewed in terms of improving optical property, electron transport and electron life time.