• 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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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.

Fabrication and device characterization of potassium fluoride solution treated CZTSSe solar cell

  • Rana, Tanka Raj;Kim, JunHo;Sim, Jun-Hyoung;Yang, Kee-Jeong;Kim, Dae-Hwan;Kang, Jin-Kyu
    • Current Applied Physics
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    • v.17 no.10
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    • pp.1353-1360
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    • 2017
  • Post deposition treatment (PDT) for $Cu_2ZnSn(S,Se)_4$ (CZTSSe) was carried out by simply dipping the absorber into the KF solution at $80^{\circ}C$. The dipping time of absorber in KF solution was found to be crucial to device parameters of CZTSSe solar cell. The K-doping improved the solar cell efficiency from 4.4% to 7.6% by 1 min dipping whereas the longer than 5 min dipping solar cells showed distorted kink J-V curves. The activation energy of CZTSSe solar cell was increased upto 1 min KF treatment from 0.83 eV to 0.92 eV which indicates interface recombination is reduced significantly. However, the activation energies of 5 min and 10 min dipping solar cells were found to be 0.81 eV and 0.63 eV where dominant recombination was interface recombination. Furthermore, trap energies of 49 meV and 298 meV of pristine CZTSSe solar cell were modified to 33 meV and 117 meV for 1 min treated CZTSSe solar cell. Trap energies of 5 min were calculated to be 112 meV and 147 meV. The proper KF doping passivated the shallow as well as deep defects of CZTSSe solar cell which is reflected in photovoltaic performances directly.

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.

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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Metal-assisted grown Si films and semiconducting nanowires for solar cells

  • Kim, Jun-Dong
    • Proceedings of the Materials Research Society of Korea Conference
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    • pp.13-13
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    • 2010
  • The solar energy conversion will take 10 % global energy need by 2033. A thin film type solar cell has been considered as one of the promising candidates for a large area applicable solar cell fabrication at a low cost. The metal-assisted growth of microcrystalline Si (mc-Si) films has been reported for a quality Si film synthesis at a low temperature. It discusses the spontaneous growth of a Si film above a metal-layer for a thin film solar cell. Quite recently, a substantial demand of nanomaterials has been addressed for cost-effective solar cells. The nanostructure provides a large photoactive surface at a fixed volume, which is an advantage in the effective use of solar power. But the promising of nanostructure active solar cell has not been much fulfilled due mainly to the difficulty in architecture of nanostructures. We present here the Si nanowire (SiNW)-embedded Schottky solar cell. Multiple SiNWs were connected to two different metals to form a Schottky or an ohmic contact according to the metal work function values. It discusses the scheme of rectifying contact between metals and SiNWs and the SiNW-embedded Schottky solar cell performances.

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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.

A Study on Verifying the Validity of a Solar Cell System Following Sunlight in the Horizontal Direction for Aid to Navigation (태양광원에 대한 수평방향 추적식 항로표지용 태양전지 시스템의 도입 타당성에 관한 연구)

  • Jeon, Joong-Sung;Kim, Jung-Hun;Lee, Yong-Han
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • pp.414-418
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    • 2009
  • In this paper, a solar power tracking method using the solar cells is proposed, which has 3 solar cell located at an interval of $60^{\circ}$ in azimuth so that the sunlight may almost be perpendicular to the solar cells without excessive mechanical operation. Compared with the solar cell voltages in each azimuth, there is the highest voltage in time interval. As a results, this solar cell system achieve higher relative efficiency of $1.6{\sim}11.5%$ than fixed solar cell system. Therefore, it is verifying that this solar cell tracking system obtain more relative efficiency than fixed solar cell system for aid to navigation.

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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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    • 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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