• 제목/요약/키워드: Dye sensitized

검색결과 648건 처리시간 0.038초

코어/쉘 구조의 나노입자 제조 및 증착 공정을 활용한 염료감응 태양전지 (Dye-sensitized Solar Cells Utilizing Core/Shell Structure Nanoparticle Fabrication and Deposition Process)

  • 정홍인;유종렬;박성호
    • Korean Chemical Engineering Research
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    • 제57권1호
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    • pp.111-117
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    • 2019

  • 기상으로 전달된 Ti 전구체가 열 플라즈마에서 고순도의 결정질 코어-$TiO_2$로 합성됨과 동시에 기판에 바로 증착시킬 수 있는 공정을 제시한다. 제조된 코어-$TiO_2$는 외부에 노출되지 않는 상태에서 원자층증착법(Atomic Layer Deposition, ALD)에 의하여 $Al_2O_3$로 코팅된다. 코어-$TiO_2$와 코팅된 쉘-$Al_2O_3$의 형태학적 특징은 transmission electron microscope (TEM) 및 transmission electron microscope - energy dispersive spectroscopy (TEM-EDS)를 통해 분석하였다. 제조된 코어-$TiO_2$/쉘-$Al_2O_3$ 나노입자의 전기적 특성은 염료감응 태양전지(dye-sensitized solar cell, DSSC)의 작동전극에 적용하여 평가하였다. Dynamic light scattering system (DLS), scanning electron microscope (SEM), X-ray Diffraction (XRD)을 통하여 코어-$TiO_2$의 평균입도, 성장속도 및 결정구조의 무게분율을 분석한 결과, 평균입도는 17.1 nm, 코어박막의 두께는 $20.1{\mu}m$이고 주 결정구조가 Anatase로 증착된 코어-$TiO_2$/쉘-$Al_2O_3$ 나노입자를 적용한 DSSC가 기존의 페이스트 방식으로 제작한 DSSC보다 더 높은 광효율을 보여준다. 기존의 페이스트방식을 활용한 DSSC의 에너지변환효율 4.99%에 비하여 선택적으로 조절된 코어-$TiO_2$/쉘-$Al_2O_3$ 나노입자를 작동전극으로 사용한 경우가 6.28%로 26.1% 더 높은 광효율을 보여준다.

  • https://doi.org/10.9713/kcer.2019.57.1.111 인용 PDF KSCI HTML

Enhancement of Dye-Sensitized Solar Cell Efficiency by Spherical Voids in Nanocrystalline ZnO Electrodes

  • Hieu, Hoang Nhat;Dao, Van-Duong;Vuong, Nguyen Minh;Kim, Dojin;Choi, Ho-Suk
    • 한국재료학회지
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    • 제24권9호
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    • pp.458-464
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    • 2014

  • Light scattering enhancement is widely used to enhance the optical absorption efficiency of dye-sensitized solar cells. In this work, we systematically analyzed the effects of spherical voids distributed as light-scattering centers in photoanode films made of an assembly of zinc oxide nanoparticles. Spherical voids in electrode films were formed using a sacrificial template of polystyrene (PS) spheres. The diameter and volume concentration of these spheres was varied to optimize the efficiency of dye-sensitized solar cells. The effects of film thickness on this efficiency was also examined. Electrochemical impedance spectroscopy was performed to study electron transport in the electrodes. The highest power conversion efficiency of 4.07 % was observed with $12{\mu}m$ film thickness. This relatively low optimum thickness of the electrode film is due to the enhanced light absorption caused by the light scattering centers of voids distributed in the film.

  • https://doi.org/10.3740/MRSK.2014.24.9.458 인용 PDF KSCI

설계적 특성 개선을 위한 Ag 그리드를 가지는 대면적 염료감응형 태양전지의 새로운 디자인 (Thle New Design of a Large Area Dye-sensitized Solar Cell with Ag Grid for Improving a Design Characteristics)

  • 최진영;이임근;홍지태;김미정;김휘영;김희제
    • 전기학회논문지
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    • 제56권1호
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    • pp.123-127
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    • 2007

  • Up sizing of dye-sensitized solar cell(DSC) is the important technology to bring about commercialization of DSC. Several studies to obtain a stable large area DSC have been investigated in overseas laboratories, but have been hardly done in our country. In this study, up sizing technology of dye sensitized solar cells(DSCs) was investigated. We investigated low dark current materials for the current collecting grid. From the result, a new DSC module with metal grid was designed, and fabricated. For a new interconnection, both working and counter electrodes are alternately coupled on 10[cm]$\times$7[cm] substrate. We have achieved 68% of fill factor and photoelectric conversion efficiency of around 2.6% as the best results of new designed DSC structure.

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Preparation of spray-coated $TiO_2$ electrodes and I-V characteristics for Dye-sensitized Solar Cells

  • Lee, Won-Jae;Koo, Bo-Kun;Kim, Hyun-Joo;Lee, Dong-Yun;Song, Jae-Sung
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2004년도 추계학술대회 논문집 Vol.17
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    • pp.687-690
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    • 2004

  • Fabrication and characterization of dye-sensitized TiO2 solar cells(DSSC) consisting of spray-coated TiO2 electrode, an electrolyte containing I-/I3- redox couple, and a Pt-coated counter electrode carried out, using mainly FE-SEM and solar simulator. Also, effect of rapid thermal annealing(RTA) temperatue on I-V curves of DSSCS consisting of approximately 10m thickness and $5{\times}5mm2$ active area. No significant difference in the apparent size of TiO2 clusters was observed with increasing RTA temperature. Also, an open circuit voltage(Voc) of approximately 0.70V and a short-circuit photocurrent(Jsc) of 8 to 12mA/cm2 were observed in the TiO2 solar cell. With increasing RTA temperature upto 550oC, photocurrent density of dye-sensitized solar cells was enhanced, leading to enhancing the efficiency of dye-sensitized solar cells having Pt-electroplated counter electrode.

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