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Mercouri G Kanatzidis - One of the best experts on this subject based on the ideXlab platform.
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all solid state dye sensitized Solar Cells with high efficiency
Nature, 2012Co-Authors: In Chung, Byunghong Lee, Robert P. H. Chang, Mercouri G KanatzidisAbstract:A solution-processable inorganic semiconductor is reported that can replace the liquid electrolyte of Dye-Sensitized Solar Cells, yielding all-solid-state Solar Cells with impressive energy conversion efficiencies. The efficiency and low cost of Dye-Sensitized Solar Cells based on titanium dioxide make them attractive for renewable-energy applications, but the use of organic electrolytes in the device structures renders them susceptible to leakage and corrosion. Mercouri Kanatzidis and colleagues have now identified a solution-processable inorganic semiconductor consisting of CsSnI3- xFx compounds that can replace the liquid electrolyte, yielding all-solid-state Solar Cells with impressive energy-conversion efficiencies, especially in the red region of the spectrum, where they outperform conventional Dye-Sensitized Solar Cells. These new compounds consist of inexpensive, Earth-abundant elements and can be processed at room temperature. With further optimization and improved dyes, much higher efficiencies should be achievable. Dye-Sensitized Solar Cells based on titanium dioxide (TiO2) are promising low-cost alternatives to conventional solid-state photovoltaic devices based on materials such as Si, CdTe and CuIn1−xGa x Se2 (refs 1, 2). Despite offering relatively high conversion efficiencies for Solar energy, typical Dye-Sensitized Solar Cells suffer from durability problems that result from their use of organic liquid electrolytes containing the iodide/tri-iodide redox couple, which causes serious problems such as electrode corrosion and electrolyte leakage3. Replacements for iodine-based liquid electrolytes have been extensively studied, but the efficiencies of the resulting devices remain low3,4,5,6,7,8,9. Here we show that the solution-processable p-type direct bandgap semiconductor CsSnI3 can be used for hole conduction in lieu of a liquid electrolyte. The resulting solid-state Dye-Sensitized Solar Cells consist of CsSnI2.95F0.05 doped with SnF2, nanoporous TiO2 and the dye N719, and show conversion efficiencies of up to 10.2 per cent (8.51 per cent with a mask). With a bandgap of 1.3 electronvolts, CsSnI3 enhances visible light absorption on the red side of the spectrum to outperform the typical Dye-Sensitized Solar Cells in this spectral region.
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All-solid-state Dye-Sensitized Solar Cells with high efficiency
Nature, 2012Co-Authors: In Chung, Byunghong Lee, Robert P. H. Chang, Jiaqing He, Mercouri G KanatzidisAbstract:Dye-Sensitized Solar Cells based on titanium dioxide (TiO(2)) are promising low-cost alternatives to conventional solid-state photovoltaic devices based on materials such as Si, CdTe and CuIn(1-x)Ga(x)Se(2) (refs 1, 2). Despite offering relatively high conversion efficiencies for Solar energy, typical Dye-Sensitized Solar Cells suffer from durability problems that result from their use of organic liquid electrolytes containing the iodide/tri-iodide redox couple, which causes serious problems such as electrode corrosion and electrolyte leakage. Replacements for iodine-based liquid electrolytes have been extensively studied, but the efficiencies of the resulting devices remain low. Here we show that the solution-processable p-type direct bandgap semiconductor CsSnI(3) can be used for hole conduction in lieu of a liquid electrolyte. The resulting solid-state Dye-Sensitized Solar Cells consist of CsSnI(2.95)F(0.05) doped with SnF(2), nanoporous TiO(2) and the dye N719, and show conversion efficiencies of up to 10.2 per cent (8.51 per cent with a mask). With a bandgap of 1.3 electronvolts, CsSnI(3) enhances visible light absorption on the red side of the spectrum to outperform the typical Dye-Sensitized Solar Cells in this spectral region.
In Chung - One of the best experts on this subject based on the ideXlab platform.
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all solid state dye sensitized Solar Cells with high efficiency
Nature, 2012Co-Authors: In Chung, Byunghong Lee, Robert P. H. Chang, Mercouri G KanatzidisAbstract:A solution-processable inorganic semiconductor is reported that can replace the liquid electrolyte of Dye-Sensitized Solar Cells, yielding all-solid-state Solar Cells with impressive energy conversion efficiencies. The efficiency and low cost of Dye-Sensitized Solar Cells based on titanium dioxide make them attractive for renewable-energy applications, but the use of organic electrolytes in the device structures renders them susceptible to leakage and corrosion. Mercouri Kanatzidis and colleagues have now identified a solution-processable inorganic semiconductor consisting of CsSnI3- xFx compounds that can replace the liquid electrolyte, yielding all-solid-state Solar Cells with impressive energy-conversion efficiencies, especially in the red region of the spectrum, where they outperform conventional Dye-Sensitized Solar Cells. These new compounds consist of inexpensive, Earth-abundant elements and can be processed at room temperature. With further optimization and improved dyes, much higher efficiencies should be achievable. Dye-Sensitized Solar Cells based on titanium dioxide (TiO2) are promising low-cost alternatives to conventional solid-state photovoltaic devices based on materials such as Si, CdTe and CuIn1−xGa x Se2 (refs 1, 2). Despite offering relatively high conversion efficiencies for Solar energy, typical Dye-Sensitized Solar Cells suffer from durability problems that result from their use of organic liquid electrolytes containing the iodide/tri-iodide redox couple, which causes serious problems such as electrode corrosion and electrolyte leakage3. Replacements for iodine-based liquid electrolytes have been extensively studied, but the efficiencies of the resulting devices remain low3,4,5,6,7,8,9. Here we show that the solution-processable p-type direct bandgap semiconductor CsSnI3 can be used for hole conduction in lieu of a liquid electrolyte. The resulting solid-state Dye-Sensitized Solar Cells consist of CsSnI2.95F0.05 doped with SnF2, nanoporous TiO2 and the dye N719, and show conversion efficiencies of up to 10.2 per cent (8.51 per cent with a mask). With a bandgap of 1.3 electronvolts, CsSnI3 enhances visible light absorption on the red side of the spectrum to outperform the typical Dye-Sensitized Solar Cells in this spectral region.
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All-solid-state Dye-Sensitized Solar Cells with high efficiency
Nature, 2012Co-Authors: In Chung, Byunghong Lee, Robert P. H. Chang, Jiaqing He, Mercouri G KanatzidisAbstract:Dye-Sensitized Solar Cells based on titanium dioxide (TiO(2)) are promising low-cost alternatives to conventional solid-state photovoltaic devices based on materials such as Si, CdTe and CuIn(1-x)Ga(x)Se(2) (refs 1, 2). Despite offering relatively high conversion efficiencies for Solar energy, typical Dye-Sensitized Solar Cells suffer from durability problems that result from their use of organic liquid electrolytes containing the iodide/tri-iodide redox couple, which causes serious problems such as electrode corrosion and electrolyte leakage. Replacements for iodine-based liquid electrolytes have been extensively studied, but the efficiencies of the resulting devices remain low. Here we show that the solution-processable p-type direct bandgap semiconductor CsSnI(3) can be used for hole conduction in lieu of a liquid electrolyte. The resulting solid-state Dye-Sensitized Solar Cells consist of CsSnI(2.95)F(0.05) doped with SnF(2), nanoporous TiO(2) and the dye N719, and show conversion efficiencies of up to 10.2 per cent (8.51 per cent with a mask). With a bandgap of 1.3 electronvolts, CsSnI(3) enhances visible light absorption on the red side of the spectrum to outperform the typical Dye-Sensitized Solar Cells in this spectral region.
Robert P. H. Chang - One of the best experts on this subject based on the ideXlab platform.
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all solid state dye sensitized Solar Cells with high efficiency
Nature, 2012Co-Authors: In Chung, Byunghong Lee, Robert P. H. Chang, Mercouri G KanatzidisAbstract:A solution-processable inorganic semiconductor is reported that can replace the liquid electrolyte of Dye-Sensitized Solar Cells, yielding all-solid-state Solar Cells with impressive energy conversion efficiencies. The efficiency and low cost of Dye-Sensitized Solar Cells based on titanium dioxide make them attractive for renewable-energy applications, but the use of organic electrolytes in the device structures renders them susceptible to leakage and corrosion. Mercouri Kanatzidis and colleagues have now identified a solution-processable inorganic semiconductor consisting of CsSnI3- xFx compounds that can replace the liquid electrolyte, yielding all-solid-state Solar Cells with impressive energy-conversion efficiencies, especially in the red region of the spectrum, where they outperform conventional Dye-Sensitized Solar Cells. These new compounds consist of inexpensive, Earth-abundant elements and can be processed at room temperature. With further optimization and improved dyes, much higher efficiencies should be achievable. Dye-Sensitized Solar Cells based on titanium dioxide (TiO2) are promising low-cost alternatives to conventional solid-state photovoltaic devices based on materials such as Si, CdTe and CuIn1−xGa x Se2 (refs 1, 2). Despite offering relatively high conversion efficiencies for Solar energy, typical Dye-Sensitized Solar Cells suffer from durability problems that result from their use of organic liquid electrolytes containing the iodide/tri-iodide redox couple, which causes serious problems such as electrode corrosion and electrolyte leakage3. Replacements for iodine-based liquid electrolytes have been extensively studied, but the efficiencies of the resulting devices remain low3,4,5,6,7,8,9. Here we show that the solution-processable p-type direct bandgap semiconductor CsSnI3 can be used for hole conduction in lieu of a liquid electrolyte. The resulting solid-state Dye-Sensitized Solar Cells consist of CsSnI2.95F0.05 doped with SnF2, nanoporous TiO2 and the dye N719, and show conversion efficiencies of up to 10.2 per cent (8.51 per cent with a mask). With a bandgap of 1.3 electronvolts, CsSnI3 enhances visible light absorption on the red side of the spectrum to outperform the typical Dye-Sensitized Solar Cells in this spectral region.
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All-solid-state Dye-Sensitized Solar Cells with high efficiency
Nature, 2012Co-Authors: In Chung, Byunghong Lee, Robert P. H. Chang, Jiaqing He, Mercouri G KanatzidisAbstract:Dye-Sensitized Solar Cells based on titanium dioxide (TiO(2)) are promising low-cost alternatives to conventional solid-state photovoltaic devices based on materials such as Si, CdTe and CuIn(1-x)Ga(x)Se(2) (refs 1, 2). Despite offering relatively high conversion efficiencies for Solar energy, typical Dye-Sensitized Solar Cells suffer from durability problems that result from their use of organic liquid electrolytes containing the iodide/tri-iodide redox couple, which causes serious problems such as electrode corrosion and electrolyte leakage. Replacements for iodine-based liquid electrolytes have been extensively studied, but the efficiencies of the resulting devices remain low. Here we show that the solution-processable p-type direct bandgap semiconductor CsSnI(3) can be used for hole conduction in lieu of a liquid electrolyte. The resulting solid-state Dye-Sensitized Solar Cells consist of CsSnI(2.95)F(0.05) doped with SnF(2), nanoporous TiO(2) and the dye N719, and show conversion efficiencies of up to 10.2 per cent (8.51 per cent with a mask). With a bandgap of 1.3 electronvolts, CsSnI(3) enhances visible light absorption on the red side of the spectrum to outperform the typical Dye-Sensitized Solar Cells in this spectral region.
Byunghong Lee - One of the best experts on this subject based on the ideXlab platform.
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all solid state dye sensitized Solar Cells with high efficiency
Nature, 2012Co-Authors: In Chung, Byunghong Lee, Robert P. H. Chang, Mercouri G KanatzidisAbstract:A solution-processable inorganic semiconductor is reported that can replace the liquid electrolyte of Dye-Sensitized Solar Cells, yielding all-solid-state Solar Cells with impressive energy conversion efficiencies. The efficiency and low cost of Dye-Sensitized Solar Cells based on titanium dioxide make them attractive for renewable-energy applications, but the use of organic electrolytes in the device structures renders them susceptible to leakage and corrosion. Mercouri Kanatzidis and colleagues have now identified a solution-processable inorganic semiconductor consisting of CsSnI3- xFx compounds that can replace the liquid electrolyte, yielding all-solid-state Solar Cells with impressive energy-conversion efficiencies, especially in the red region of the spectrum, where they outperform conventional Dye-Sensitized Solar Cells. These new compounds consist of inexpensive, Earth-abundant elements and can be processed at room temperature. With further optimization and improved dyes, much higher efficiencies should be achievable. Dye-Sensitized Solar Cells based on titanium dioxide (TiO2) are promising low-cost alternatives to conventional solid-state photovoltaic devices based on materials such as Si, CdTe and CuIn1−xGa x Se2 (refs 1, 2). Despite offering relatively high conversion efficiencies for Solar energy, typical Dye-Sensitized Solar Cells suffer from durability problems that result from their use of organic liquid electrolytes containing the iodide/tri-iodide redox couple, which causes serious problems such as electrode corrosion and electrolyte leakage3. Replacements for iodine-based liquid electrolytes have been extensively studied, but the efficiencies of the resulting devices remain low3,4,5,6,7,8,9. Here we show that the solution-processable p-type direct bandgap semiconductor CsSnI3 can be used for hole conduction in lieu of a liquid electrolyte. The resulting solid-state Dye-Sensitized Solar Cells consist of CsSnI2.95F0.05 doped with SnF2, nanoporous TiO2 and the dye N719, and show conversion efficiencies of up to 10.2 per cent (8.51 per cent with a mask). With a bandgap of 1.3 electronvolts, CsSnI3 enhances visible light absorption on the red side of the spectrum to outperform the typical Dye-Sensitized Solar Cells in this spectral region.
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All-solid-state Dye-Sensitized Solar Cells with high efficiency
Nature, 2012Co-Authors: In Chung, Byunghong Lee, Robert P. H. Chang, Jiaqing He, Mercouri G KanatzidisAbstract:Dye-Sensitized Solar Cells based on titanium dioxide (TiO(2)) are promising low-cost alternatives to conventional solid-state photovoltaic devices based on materials such as Si, CdTe and CuIn(1-x)Ga(x)Se(2) (refs 1, 2). Despite offering relatively high conversion efficiencies for Solar energy, typical Dye-Sensitized Solar Cells suffer from durability problems that result from their use of organic liquid electrolytes containing the iodide/tri-iodide redox couple, which causes serious problems such as electrode corrosion and electrolyte leakage. Replacements for iodine-based liquid electrolytes have been extensively studied, but the efficiencies of the resulting devices remain low. Here we show that the solution-processable p-type direct bandgap semiconductor CsSnI(3) can be used for hole conduction in lieu of a liquid electrolyte. The resulting solid-state Dye-Sensitized Solar Cells consist of CsSnI(2.95)F(0.05) doped with SnF(2), nanoporous TiO(2) and the dye N719, and show conversion efficiencies of up to 10.2 per cent (8.51 per cent with a mask). With a bandgap of 1.3 electronvolts, CsSnI(3) enhances visible light absorption on the red side of the spectrum to outperform the typical Dye-Sensitized Solar Cells in this spectral region.
Qifeng Zhang - One of the best experts on this subject based on the ideXlab platform.
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applications of light scattering in dye sensitized Solar Cells
Physical Chemistry Chemical Physics, 2012Co-Authors: Qifeng Zhang, Daniel Myers, Jolin Lan, Samson A Jenekhe, Guozhong CaoAbstract:Light scattering is a method that has been employed in Dye-Sensitized Solar Cells for optical absorption enhancement. In conventional Dye-Sensitized Solar Cells, large TiO2 particles with sizes comparable to the wavelength of visible light are used as scatterers by either being mixed into the nanocrystalline film to generate light scattering or forming a scattering layer on the top of the nanocrystalline film to reflect the incident light, with the aim to extend the traveling distance of incident light within the photoelectrode film. Recently, hierarchical nanostructures, for example nanocrystallite aggregates (among others), have been applied to Dye-Sensitized Solar Cells. When used to form a photoelectrode film, these hierarchical nanostructures have demonstrated a dual function: providing large specific surface area; and generating light scattering. Some other merits, such as the capability to enhance electron transport, have been also observed on the hierarchically structured photoelectrode films. Hierarchical nanostructures possessing an architecture that may provide sufficient internal surface area for dye adsorption and meanwhile may generate highly effective light scattering, make them able to create photoelectrode films with optical absorption significantly more efficient than the dispersed nanoparticles used in conventional Dye-Sensitized Solar Cells. This allows reduction of the thickness of the photoelectrode film and thus lowering of the charge recombination in Dye-Sensitized Solar Cells, making it possible to increase further the efficiency of existing Dye-Sensitized Solar Cells.
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Recent Progress in Dye-Sensitized Solar Cells Using Nanocrystallite Aggregates
Advanced Energy Materials, 2011Co-Authors: Qifeng Zhang, Kwangsuk Park, Daniel Myers, Guozhong CaoAbstract:Nanocrystallite aggregates are spherical assemblies of nanometer-sized crystallites and feature a size on the order of sub-micrometers. This paper reports and summarizes recent progress in nanocrystallite aggregates for applications in Dye-Sensitized Solar Cells. It emphasizes that nanocrystallite aggregates are a promising class of materials with the capability to generate light scattering, enhance electron transport, retain high specific surface area for dye adsorption, and facilitate electrolyte diffusion while serving as the photoelectrode film of a Dye-Sensitized Solar cell. In the Perspectives section, it is suggested that optimization of the porosity of the aggregates, the facets of nanocrystallites forming the aggregates, and the structure of photoelectrode film could possibly lead to breakthroughs in improving the power conversion efficiency of the current state-of-the-art Dye-Sensitized Solar Cells.
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hierarchically structured zno film for dye sensitized Solar Cells with enhanced energy conversion efficiency
Advanced Materials, 2007Co-Authors: Tammy P Chou, Qifeng Zhang, Gerald E FryxellAbstract:The interest in Dye-Sensitized Solar Cells has increased due to reduced energy sources and higher energy production costs. For the most part, titania (TiO2) has been the material of choice for Dye-Sensitized Solar Cells and so far have shown to exhibit the highest overall light conversion efficiency ~ 11%.[1] However, zinc oxide (ZnO) has recently been explored as an alternative material in Dye-Sensitized Solar Cells with great potential.[2] The main reasons for this increase in research surrounding ZnO material include: 1) ZnO having a band gap similar to that for TiO2 at 3.2 eV,[3] and 2) ZnO having a much higher electron mobility ~ 115-155 cm2/Vs[4] than that for anatase titania (TiO2), which is reported to be ~ 10-5 cm2/Vs.[5] In addition, ZnO has a few advantages as the semiconductor electrode when compared to TiO2, including 1) simpler tailoring of the nanostructure as compared to TiO2, and 2) easier modification of the surface structure. These advantages[6] are thought to provide a promising means for improving the Solar cell performance of the working electrode in Dye-Sensitized Solar Cells.
