• 제목/요약/키워드: Solar light

검색결과 1,246건 처리시간 0.025초

High-Efficiency Polymer-Titanium Oxide Hybrid Solar Cells

  • Lee, Kwang-Hee
    • 한국고분자학회:학술대회논문집
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    • 한국고분자학회 2006년도 IUPAC International Symposium on Advanced Polymers for Emerging Technologies
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    • pp.186-186
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    • 2006
  • We report a new architecture for high efficiency polymer solar cells introducing a new concept of 'optical spacer' with new material. By implementing a novel solution-based titanium oxide ($TiO_{x}$) layer between the active layer and the electron collecting Al electrode, we invented a way to increase ${\sim}50\;%$ in power conversion efficiency compared to conventional polymer solar cells. Now the new devices exhibit ${\sim}6\;%$ power conversion efficiency, which is the highest value reported to date for a polymer based photovoltaic cell. The $TiO_{x}$ layer increases the efficiency by modifying the spatial distribution of the light intensity inside the device, thereby creating more photogenerated charge carriers in the bulk heterojunction layer.

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태양전지용 ZnO:Al 박막의 wet etching 에 따른 특성 변화

  • 정유섭;김상모;김경환
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2008년도 추계학술대회 논문집 Vol.21
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    • pp.235-236
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    • 2008
  • Wet etched ZnO:Al films for thin film solar cells were prepared by Facing Target sputtering(FTS) method. Wet etching has been used to produce a rough TCO surface that enables light trapping in the absorber. The ZnO:Al films for thin film solar cells were etched by HCl 0.5%. The etching performance of ZnO:Al films can be tuned by changing etching time. The etched ZnO:Al films compared to a smooth ZnO:Al thin film structure. From the results, the lowest resistivity of deposited films was $5.67\times10^{-4}$ [$\Omega$-cm] and the transmittance of all ZnO:Al thin films were over 80% in visible range.

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Photovoltaic Performance of Dye-sensitized Solar Cells assembled with Hybrid Composite Membrane based on Polypropylene Non-woven Matrix

  • Choi, Yeon-Jeong;Kim, Dong-Won
    • Bulletin of the Korean Chemical Society
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    • 제32권2호
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    • pp.605-608
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    • 2011
  • Hybrid composite membranes were prepared by coating poly(ethylene oxide) and $SiO_2$ particles onto the porous polypropylene nonwoven matrix. Gel polymer electrolytes prepared by soaking the hybrid composite membranes in an organic electrolyte solution exhibited ionic conductivities higher than $1.1{\times}10^{-3}Scm^{-1}$ at room temperature. Dyesensitized solar cell (DSSC) employing the hybrid composite membrane with PEO and 10 wt % $SiO_2$ exhibited an open circuit voltage of 0.77 V and a short circuit current of 10.78 $mAcm^{-2}$ at an incident light intensity of 100 $mWcm^{-2}$, yielding a conversion efficiency of 5.2%. DSSC employing the hybrid composite membrane showed more stable photovoltaic performance than that of the DSSC assembled with liquid electrolyte.

태양광 조명 시스템의 집광 효율 향상을 위한 정렬 및 패키징 기술 (Alignment and Packaging Technology for Improving The Efficiency of The Solar Daylighting System)

  • 김태훈;신병한;정명영
    • 마이크로전자및패키징학회지
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    • 제21권3호
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    • pp.37-41
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    • 2014
  • 본고에서는 태양광 조명 시스템 중 태양을 추적하며 오목한 형태의 반사경으로 태양광을 집광하고, 전기에너지로 변환과정 없이 그대로 조명으로 사용하는 시스템의 효율 향상에 관해 다뤘다. 반사경 및 렌즈들의 초점거리, 위치 등에 따라 시스템 전체의 효율이 크게 좌우되고, 제품의 조립 및 제작 과정, 외적 환경요인 등에 의해 렌즈 및 거울간의 정렬 상태가 집광효율에 상당한 영향을 준다. 시뮬레이션을 통해 최대효율을 내기 위한 convex lens의 위치를 확인하였다.

ENHANCEMENT OF PHOTOVOLTAIC PERFORMANCE IN COPPER PHTHALOCYNINE THICK FILM SOLAR CELLS

  • Ruiono, Yo Tomota;Momose, Yoshihiro;Takeuchi, Manabu
    • 한국표면공학회지
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    • 제29권6호
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    • pp.673-677
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    • 1996
  • Copper phthalocyanine(CuPc) thick film solar cells were fabgricated byspin coating and their photovoltaic behavior was studied. Polyvinylidene fluoride (PVdF) was used for the binder. Aluminum and indium were employed as electrode metals to form Schottky contact to CuPc layer. The cells showed rectifying J-V characteristics in the dark and photovoltaic effect associated with white light irradiation. The photovoltaic performance of the cells strongly depended on contact metals, in which the formation of oxide layer between binder layer and electrode interface affected the solar cell. Influnce of the CuPc layer thickness, CuPc/PVdF ratio on the photovoltaic performance of the cells were also examined.

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염료감응 태양전지 모듈의 장기안정성 향상을 위한 실링기술 연구 (The Effect of Sealing Technology on the Long-Term Stability of Dye-Sensitized Solar Cell Module)

  • 이광수;고민재
    • Current Photovoltaic Research
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    • 제4권4호
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    • pp.155-158
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    • 2016
  • Long-term stability of dye-sensitized solar cell (DSSC) module is critical for the commercialization. We investigated the effect of sealing technology on the long-term stability of the $10cm{\times}11cm$ sized DSSC modules. We applied the concept of secondary sealing to the module and then performed several stability tests such as humidity cycle, 1 sun light soaking and outdoor stability tests. The enhanced stability was confirmed for the DSSC module employing optimized sealing materials and architectures.

태양전지 실리콘 웨이퍼에서의 레일리기준 기반 레이저산란 패턴 분석 및 결함 검출 (Investigation of Laser Scattering Pattern and Defect Detection Based on Rayleigh Criterion for Crystalline Silicon Wafer Used in Solar Cell)

  • 연정승;김경범
    • 한국정밀공학회지
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    • 제28권5호
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    • pp.606-613
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    • 2011
  • In this paper, patterns of laser scattering and detection of micro defects have been investigated based on Rayleigh criterion for silicon wafer in solar cell. Also, a new laser scattering mechanism is designed using characteristics of light scattering against silicon wafer surfaces. Its parameters are to be optimally selected to obtain effective and featured patterns of laser scattering. The optimal parametric ranges of laser scattering are determined using the mean intensity of laser scattering. Scattering patterns of micro defects are investigated at the extracted parameter region. Among a lot of pattern features, both maximum connected area and number of connected component in patterns of laser scattering are regarded as the important information for detecting micro defects. Their usefulness is verified in the experiment.

소형 태양 반사경 Cluster를 이용한 태양열 발전에 대한 타당성 연구 (A Feasibility Study of using Mini-dish Systems for Solar Power Generation)

  • 오승진;현준호;천원기
    • 신재생에너지
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    • 제2권4호
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    • pp.39-45
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    • 2006
  • This paper introduces a preliminary work for the design of a mini-dish cluster system for power generation. Each mini-dish [typically has a 20 to 30 cm in diameter] is designed with a simple parabolic profile concentrating sun light [after the glass glazing cover to avoid dust deposition on the reflector and facilitate cleaning] onto a centrally located small plane[or concave] mirror which is placed on the bottom side of a transparent glass cover. The mirror with a mini-dish concentrator is designed to focus beam radiation onto a focal point before it enters a bundle of optical fibers connected to a remote receiver for power generation. Different options are considered in designing a mini-dish concentrator to maximize its effectiveness for the collection and use of solar energy.

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Realization of flexible polymer solar cell by annealing-free process using 1,8-Diiodooctane as additive

  • Kim, Youn-Su;Ju, Byeong-Kwon;Kim, Kyung-Kon
    • 한국진공학회:학술대회논문집
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    • 한국진공학회 2011년도 제40회 동계학술대회 초록집
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    • pp.383-383
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    • 2011
  • We fabricated thermal annealing-free polymer solar cells (PSC) by processing with additive and applied to flexible substrates. The 1, 8-Diiodooctane of 3 vol% blended with active solution resulted in enhancement of $J_{SC}$ due to increase of light absorption and hole mobility as improving the crystallinity of P3HT. In addition, the $V_{OC}$ of PSCs with additive was improved by inserting $TiO_2$ layer without any treatment. The $TiO_2$ layer prevented the direct contact between active layer and Al electrode and reduced the charge recombination near Active/Al interface. It was confirmed by calculation of J0 and photo-voltage transient measurement. The power conversion efficiencies of annealing-free PSCs using additive for ITO glass and flexible (ITO PEN) substrate were obtained 3.03% and 2.45%, respectively.

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실내조명용 화이버 광학 집광기의 성능에 관한 실험적 평가 (Experimental Evaluation of a Fiber Optic Concentrator for Daylighting)

  • 한현주;김정태
    • 한국태양에너지학회 논문집
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    • 제28권3호
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    • pp.27-34
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    • 2008
  • A series of outdoor tests were conducted on a fiber optic solar concentrator system for its performance on daylighting. The system is comprised of four main components - a parabolic dish reflector, a convex mirror, a homogenizer tube and an optical fiber cable. Results show that the system could be successfully applied for indoor lighting if some improvements are made for light transmiting (optical) cables. A maximum concentration ratio of 90 was observed delivering the illuminance of 4,800 lux at a distance of 1.2m from the diffuser for the outdoor illuminance of 102,100 lux.