• Title, Summary, Keyword: Dye-sensitized Solar Cell

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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.

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.

Preparations and Photovoltaic Properties of Dye-Sensitized Solar Cells Using Polymer Electrolytes (고분자 전해질을 이용한 염료감응형 태양전지의 제작과 광기전 특성)

  • Kim, Mi-Ra;Shin, Won-Suk;Jin, Sung-Ho;Lee, Jin-Kook
    • 한국신재생에너지학회:학술대회논문집
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    • pp.175-178
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    • 2006
  • Solid-state dye-sensitized solar cells were fabricated using a polymer matrix in electrolyte in the purpose of the improvement of the durability in the dye-sensitized solar cell. In these dye-sensitized solar cells, the polymer electrolyte consisting of $I_2$, LiI, ionic liquid, ethylene carbonate/propylene carbonate and polymer matrix was casted onto $TiO_2$ electrode impregnated Ruthenium complex dye as a photosensitizer. Photovoltaic properties of solid-state dye-sensitized solar cells using polymer matrix (PMMA, PEG, or PAN) were investigated. Comparing photovoltaic effects of cells using hole conducting polymers (BE or 6P) instead of polymer matrix, we investigated the availability of the solid-state polymer electrolyte in dye-sensitized solar cells.

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A Study on The Photoelectric Characteristics of Dye-sensitized Solar Cell according to Expanding Photo-electrode (염료감응형 태양전지의 광전극 확장에 따른 광전특성 연구)

  • Seo, Hyun-Woong;Kim, Mi-Jeong;Park, Je-Wook;Kim, Ho-Sung;Kim, Hee-Je
    • 한국신재생에너지학회:학술대회논문집
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    • pp.305-308
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    • 2007
  • The field of dye-sensitized solar cell (DSC) is being researched actively at present. Because DSC has several advantages to pass the limits of Si solar cells such as a low manufacturing expense, a simple manufacturing process and its transparency. A lot of researches are underway about materials and processes in the field of dye-sensitized solar cell but its structure has been fixed up as the sandwich structure that both edges are used as positive and negative terminals. But the structure as of present is a factor of decreasing efficiency because the more electrons are recombined the further distance from terminal, considering about the characteristic of dye-sensitized solar cell that electrons generated inside cell are moved by diffusion. In this study, we made experiment on expanding the terminal to shorten internal moving distance of electron and compared the results according to the variation of active area to find out the effect of this trial. As a result, we achieved about 15.5% improvement of maximum power and 0.5% improvement of efficiency from terminal-expanded dye-sensitized solar cell of $2cm^{2}$ active area and concluded that the increasing rate of efficiency is raised as the active area becomes wider.

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A Characteristic Study on the Dye-Sensitized Solar Cell by the Shadow Effect (그림자 효과에 의한 염료감응형 태양전지의 특성연구)

  • Kim, Hee-Je;Lee, Jeong-Gee;Lee, Kyung-Jun;Prabakar, Prabakar;Sin, Dong-Seoul;Chae, Won-Yong
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.59 no.1
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    • pp.144-151
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    • 2010
  • The shadowing effects lead to the serious power losses of the PV module. The shadowing effects are caused by several factors such as leafs, dust, antenna and clouds. The dye-sensitized solar cells are more economical than the conventional silicon solar cell that's why the dye-sensitized solar cells are recently focused on. We carried out research on the efficiency of the dye-sensitized solar cell depending on the level of shadow changing the formula of the circuit. The research on the efficiency of the large dye-sensitized solar cell depending on the level of shadow focused on commercialization was carried out. As the results, it is known that the series and parallel connection method is the best choice for the least losses of PV module assemblies. It is especially known that one more series connection is the best choice for the least losses about shadowing effects and current losses in the series and parallel connection.

A Study on the Improvement of Efficiency by Scribing Transparent Conducting Oxide of Dye-sensitized Solar Cell (염료감응형 태양전지의 투명 전극 식각을 통한 효율 향상 연구)

  • Seo, Hyun-Woong;Son, Min-Kyu;Lee, Kyoung-Jun;Kim, Jeong-Hoon;Kim, Hee-Je
    • 한국신재생에너지학회:학술대회논문집
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    • pp.416-418
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    • 2008
  • Dye-sensitized solar cell using transparent conducting oxide as electrode has large resistance such as surface resistance, charge transportation impedance in counter electrode and electrolyte, impedance between each interface. Among that resistances, surface resistance of transparent conducting oxide is relatively large. So the change of transparency has a large effect on internal resistance of dye-sensitized solar cell. Consequently, that change cause to increase or decrease the conversion efficiency. We tried to reduce the surface resistance by laser-scribing. The active area is seperated from total transparent conducting oxide by Nd:YAG laser-scribing. As a result, we achieved the improvement of efficiency about 7% and 11% in case of $0.25cm^2$ and $1.00cm^2$ dye-sensitized solar cells.

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Analysis Thermal Performance of PV/Thermal Collector with Dye-sensitized Solar Cell Module (염료감응형태양전지 모듈 적용 PVT 집열기의 열적 성능 분석)

  • Jang, Han-Bin;Mun, Jong-Hyeok;Gang, Jun-Gu;Kim, Jin-Hui;Kim, Jun-Tae
    • Proceedings of the Korean Society for Emotion and Sensibility Conference
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    • pp.273-276
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    • 2009
  • Photovoltaic-thermal(PVT) collectors are a combination of photovoltaic modules with solar thermal collectors, forming one device that receives solar radiation and produces electricity and heat simultaneously. Of various PV modules, dye-sensitized solar cell(DSC) is a relatively new type of solar cell technology that can transmit light while they can generate electricity. With this aspect, DSC can be applied into solar thermal collectors. The object of this study is to evaluate the thermal performance of PVT collector with DSC. The thermal performance of the DSC PVT combind collector was measured in outdoor conditions with the solar radiation of over $700W/m^2$. In this study, the PVT collector with the 30% light transmittance of DSC achieved its thermal efficiency of about 36%.

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Affected Enhance of Dye-Sensitized Solar Cells Using Silver Nanoparticle (은 나노 입자를 이용한 염료감응형 태양전지의 효율 향상 효과)

  • Jung, Haeng Yun;Hong, Kyung Jin
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.31 no.1
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    • pp.34-39
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    • 2018
  • In this study, e-beam equipment was used to form silver nanoparticles on thin films of $TiO_2$ to increase the efficiency of dye-sensitized solar cells and improve the annealing process. $TiO_2$ thin films with nanoparticle photoelectrodes were fabricated in individual units for use in dye-sensitized solar cells. The characteristics of dye-sensitized solar cells were compared to those of the prepared $TiO_2$ photoelectrode with and without nanoparticles. The dye-sensitized solar cells with silver nanoparticles showed a significant increase in the electric current density compared with the pure $TiO_2$ dye-sensitized solar cell and improved the solar conversion efficiency to 27.89%. The increased density of electric current increased the extent of light absorption of the dye owing to the plasmon resonance of the nanoparticles at the local surfaces. This phenomenon led to increased light scattering, which in turn increased the current density of the dye-sensitized solar cells and improved the solar conversion efficiency.

Synthesis and Photovoltaic Performance of NIR Absorption Dyes for the Dye Sensitized Solar Cell (NIR 흡수 염료를 이용한 염료감응형 태양전지)

  • Kim, Sangah;Jung, Miran;Lee, Minkyung;Kim, Jaehong
    • 한국신재생에너지학회:학술대회논문집
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    • pp.118.1-118.1
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    • 2011
  • The dye-sensitized solar cell (DSSC) is a device for the conversion of visible light into electricity, based on the sensitization of wide bandgap semiconductors. The performance of the cell mainly depends on a dye used as sensitizer. The absorption spectrum of the dye and the anchorage of the dye to the surface of TiO2 are important parameters determining the efficiency of the cell. Generally, transition metal coordination compounds(ruthenium polypyridyl complexes) are used as the effective sensitizers, due to their intense charge-transfer absorption in the whole visible range and highly efficient metal-to ligand charge transfer. However, ruthenium polypyridyl complexes contain a heavy metal, which is undesirable from point of view of the environmental aspects. Moreover, the process to synthesize the complexes is complicated and costly. Alternatively, organic dyes can be used for the same purpose with an acceptable efficiency. The advantages of organic dyes include their availability and low cost. We designed and synthesized a series of organic sensitizers containing long wavelength absorption-chromophores for the dye sensitized solar cell. The DSSC composed of Blue-chromophores for the sensitization absorbed long wavelength region which is different also applied into the dye-cocktail (mixing) system. The photovoltaic property of DSSCs organic long wavelength absorption-chromophores were measured and evaluated by comparison with that of individual chromophores.

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Synthesis and Photovoltaic Performance of Long Wavelength Absorption Dyes for the Dye Sensitized Solar Cell (장 파장 대 태양광을 흡수하는 염료감응형태양전지에 대한 염료와 합성)

  • Kim, Sangah;Yoon, Jooyoung;Kim, Jaehong
    • 한국신재생에너지학회:학술대회논문집
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    • pp.89.2-89.2
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    • 2010
  • The dye-sensitized solar cell (DSSC) is a device for the conversion of visible light into electricity, based on the sensitization of wide bandgap semiconductors. The performance of the cell mainly depends on a dye used as sensitizer. The absorption spectrum of the dye and the anchorage of the dye to the surface of $TiO_2$ are important parameters determining the efficiency of the cell. Generally, transition metal coordination compounds(ruthenium polypyridyl complexes) are used as the effective sensitizers, due to their intense charge-transfer absorption in the whole visible range and highly efficient metal-to ligand charge transfer. However, ruthenium polypyridyl complexes contain a heavy metal, which is undesirable from point of view of the environmental aspects. Moreover, the process to synthesize the complexes is complicated and costly. Alternatively, organic dyes can be used for the same purpose with an acceptable efficiency. The advantages of organic dyes include their availability and low cost. We designed and synthesized a series of organic sensitizers containing long wavelength absorption-chromophores for the dye sensitized solar cell. The DSSC composed of Blue-chromophores for the sensitization absorbed long wavelength region which is different also applied into the dye-cocktail (mixing) system. The photovoltaic property of DSSCs organic long wavelength absorption-chromophores were measured and evaluated by comparison with that of individual chromophores.

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