The Experts below are selected from a list of 4080 Experts worldwide ranked by ideXlab platform
Yang Yang - One of the best experts on this subject based on the ideXlab platform.
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Transparent Polymer Photovoltaics for Solar Energy Harvesting and Beyond
Joule, 2018Co-Authors: Sheng Yung Chang, Pei Cheng, Gang Li, Yang YangAbstract:Summary Polymer photovoltaics have become a promising alternative energy due to lightweight properties, environmental friendliness, and solution processability. Transparent organic photovoltaics in particular have been recently receiving more attention in the photovoltaics field due to their unique potential in future applications beyond mere harvesting of solar energy. This perspective is further enhanced by the recent developments of high-performance Polymer photovoltaics (including infrared absorbing materials and devices) that could achieve superior visible transparency and power conversion efficiency. To realize high-performance Transparent organic photovoltaics, the main strategy is to shift the active-layer absorption spectrum to the infrared region by designing new low-bandgap donors and non-fullerene acceptors, and to reduce the invalid absorption by developing new Transparent electrode materials. The potential applications are diverse, especially for spectrum-sensitive ones such as the greenhouse in agriculture. Finally, some key research areas of Transparent organic photovoltaics that may deserve further attention are discussed.
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Transparent Polymer Photovoltaics for Solar Energy Harvesting and Beyond
Joule, 2018Co-Authors: Sheng Yung Chang, Pei Cheng, Gang Li, Yang YangAbstract:Polymer photovoltaics have become a promising alternative energy due to lightweight properties, environmental friendliness, and solution processability. Transparent organic photovoltaics in particular have been recently receiving more attention in the photovoltaics field due to their unique potential in future applications beyond mere harvesting of solar energy. This perspective is further enhanced by the recent developments of high-performance Polymer photovoltaics (including infrared absorbing materials and devices) that could achieve superior visible transparency and power conversion efficiency. To realize high-performance Transparent organic photovoltaics, the main strategy is to shift the active-layer absorption spectrum to the infrared region by designing new low-bandgap donors and non-fullerene acceptors, and to reduce the invalid absorption by developing new Transparent electrode materials. The potential applications are diverse, especially for spectrum-sensitive ones such as the greenhouse in agriculture. Finally, some key research areas of Transparent organic photovoltaics that may deserve further attention are discussed. Polymer photovoltaics are a promising alternative energy for visible-spectrum applications because the absorption spectra of organic semiconductors, including Polymer and small-molecule types, are not continuous as in inorganic semiconductors. As a result, the design of organic materials is able to pass visible light and absorb non-visible light such as the infrared. According to the energy distribution of the solar spectrum, more than a half of solar light is distributed within the infrared region. The theoretical efficiency of Polymer photovoltaics with only infrared absorption therefore can be as high as a device with only visible absorption. Accordingly, we present a perspective that concisely reviews the developments in Transparent Polymer photovoltaics and their potential applications in order to engender new ideas on achieving superior transparency, power conversion efficiency, and more practical utilities. Because of an emergent demand for visible-spectrum applications in daily life, organic-based photovoltaics are thought to be a strong candidate to fulfill this need. This article concisely reviews the developments in Polymer and small-molecule materials for achieving effective Transparent photovoltaic devices and their potential applications in order to engender new ideas on achieving superior transparency, power conversion efficiency, and more practical uses.
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Visibly Transparent Polymer solar cells produced by solution processing
ACS Nano, 2012Co-Authors: Chun-chao Chen, Steve Hawks, Yue Bing Zheng, Choong Heui Chung, Tze Bin Song, Letian Dou, Yu-guang Yang, Paul S. Weiss, Rui Zhu, Gang Li, Yang YangAbstract:Visibly Transparent photovoltaic devices can open photovoltaic applications in many areas, such as building-integrated photovoltaics or integrated photovoltaic chargers for portable electronics. We demonstrate high-performance, visibly Transparent Polymer solar cells fabricated via solution processing. The photoactive layer of these visibly Transparent Polymer solar cells harvests solar energy from the near-infrared region while being less sensitive to visible photons. The top Transparent electrode employs a highly Transparent silver nanowire-metal oxide composite conducting film, which is coated through mild solution processes. With this combination, we have achieved 4% power-conversion efficiency for solution-processed and visibly Transparent Polymer solar cells. The optimized devices have a maximum transparency of 66% at 550 nm.
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facile synthesis of highly Transparent Polymer nanocomposites by introduction of core shell structured nanoparticles
Chemistry of Materials, 2008Co-Authors: Yuanqing Li, Shaoyun Fu, Yang YangAbstract:A high transmittance is the prerequisite for optically functional materials to be successfully used in practical applications. However, introduction of inorganic nanoparticles even at low contents into Transparent Polymers often leads to opaque nanocomposites due to light scattering caused by the nanoparticles because of the refractive index (RI) mismatch between nanoparticles and Polymer matrices. This article reports for the first time a strategy for facile synthesis of highly Transparent Polymer nanocomposites by introduction of core–shell structured nanoparticles with the same RI. This strategy is based on the assumption that the core–shell structured nanoparticles can be regarded as integral nanofillers that have one refractive index in the Polymer medium. In this study, core–shell structured silica–titania (S-T) nanoparticles were synthesized through coating titania with continuous feeding via hydrolysis of tetrabutyl orthotitanate (TBOT) to silica core preprepared according to Stober’s method by ba...
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Facile Synthesis of Highly Transparent Polymer Nanocomposites by Introduction of Core–Shell Structured Nanoparticles
Chemistry of Materials, 2008Co-Authors: Yuanqing Li, Shaoyun Fu, Yang YangAbstract:A high transmittance is the prerequisite for optically functional materials to be successfully used in practical applications. However, introduction of inorganic nanoparticles even at low contents into Transparent Polymers often leads to opaque nanocomposites due to light scattering caused by the nanoparticles because of the refractive index (RI) mismatch between nanoparticles and Polymer matrices. This article reports for the first time a strategy for facile synthesis of highly Transparent Polymer nanocomposites by introduction of core–shell structured nanoparticles with the same RI. This strategy is based on the assumption that the core–shell structured nanoparticles can be regarded as integral nanofillers that have one refractive index in the Polymer medium. In this study, core–shell structured silica–titania (S-T) nanoparticles were synthesized through coating titania with continuous feeding via hydrolysis of tetrabutyl orthotitanate (TBOT) to silica core preprepared according to Stober’s method by ba...
Alexander Colsmann - One of the best experts on this subject based on the ideXlab platform.
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solution processed Polymer silver nanowire top electrodes for inverted semi Transparent solar cells
Organic Electronics, 2013Co-Authors: Manuel Reinhard, Anatoliy Slobodskyy, Ralph Eckstein, Uli Lemmer, Alexander ColsmannAbstract:Abstract We present a Transparent, fully solution-processed top anode system comprising a thin, conductive Polymer interlayer below a silver nanowire mesh for efficient organic electronic devices. We fabricate inverted semi-Transparent Polymer solar cells exhibiting power conversion efficiencies that are comparable to devices incorporating an opaque electrode. By means of scanning electron microscopy and light beam induced photocurrent measurements we show that the thin Polymer interlayer facilitates charge extraction from the active layer and efficient transport to the metallic nanowire mesh.
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Solution-processed Polymer-silver nanowire top electrodes for inverted semi-Transparent solar cells
Organic Electronics: physics, materials, applications, 2013Co-Authors: Manuel Reinhard, Anatoliy Slobodskyy, Ralph Eckstein, Uli Lemmer, Alexander ColsmannAbstract:We present a Transparent, fully solution-processed top anode system comprising a thin, conductive Polymer interlayer below a silver nanowire mesh for efficient organic electronic devices. We fabricate inverted semi-Transparent Polymer solar cells exhibiting power conversion efficiencies that are comparable to devices incorporating an opaque electrode. By means of scanning electron microscopy and light beam induced photocurrent measurements we show that the thin Polymer interlayer facilitates charge extraction from the active layer and efficient transport to the metallic nanowire mesh. ?? 2012 Elsevier B.V. All rights reserved.
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cathodes comprising highly conductive poly 3 4 ethylenedioxythiophene poly styrenesulfonate for semi Transparent Polymer solar cells
Organic Electronics, 2010Co-Authors: Felix Nickel, Andreas Puetz, Christian Kayser, Manuel Reinhard, Alexander Colsmann, Hung Do, Uli LemmerAbstract:Abstract Semi-Transparent Polymer solar cells from a blend of poly-(3-hexylthiophene-2,5-diyl) and [6,6]-phenyl C61 butyric acid methyl ester (P3HT:PCBM) comprising a poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) cathode and a vacuum deposited n-doped organic buffer layer have been realized. Among the investigated organic material systems for n-doping, the use of lithium doped bathophenanthroline (BPhen:Li) allowed for proper energy level alignment and subsequently for an open-circuit voltage Voc ≈ 600 mV. Upon deposition the PEDOT:PSS adheres selectively on the BPhen:Li buffer layer in order to form the laterally defined Transparent cathode.
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Cathodes comprising highly conductive poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) for semi-Transparent Polymer solar cells
Organic Electronics: physics, materials, applications, 2010Co-Authors: Felix Nickel, Andreas Puetz, Christian Kayser, Manuel Reinhard, Alexander Colsmann, Hung Do, Uli LemmerAbstract:Semi-Transparent Polymer solar cells from a blend of poly-(3-hexylthiophene-2,5-diyl) and [6,6]-phenyl C61 butyric acid methyl ester (P3HT:PCBM) comprising a poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) cathode and a vacuum deposited n-doped organic buffer layer have been realized. Among the investigated organic material systems for n-doping, the use of lithium doped bathophenanthroline (BPhen:Li) allowed for proper energy level alignment and subsequently for an open-circuit voltage Voc ??? 600 mV. Upon deposition the PEDOT:PSS adheres selectively on the BPhen:Li buffer layer in order to form the laterally defined Transparent cathode. ?? 2009 Elsevier B.V. All rights reserved.
Fengling Zhang - One of the best experts on this subject based on the ideXlab platform.
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inverted and Transparent Polymer solar cells prepared with vacuum free processing
Solar Energy Materials and Solar Cells, 2009Co-Authors: Yinhua Zhou, Sophie Barrau, Wenjing Tian, Olle Inganäs, Fenghong Li, Fengling ZhangAbstract:Inverted Transparent Polymer solar cells were fabricated by sequentially depositing several organic layers from fluids, on ITO/glass substrates. ITO was used as a cathode to collect electrons. The photovoltage of these diodes can be increased by up to 400 mV by inserting a buffer layer of polyethylene oxide between ITO and the active layers, which results in 4-fold enhancement of power conversion efficiency under the illumination of 100 mW/cm2 simulated AM1.5 solar light. The enhancement of Voc is consistent with the work function change between ITO and ITO/PEO measured by photoelectron spectroscopy. Solar cell production without vacuum processing may lower production costs.
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Inverted and Transparent Polymer solar cells prepared with vacuum-free processing
Solar Energy Materials and Solar Cells, 2009Co-Authors: Yinhua Zhou, Olle Inganäs, Sophie Barrau, Wenjing Tian, Fumin Li, Fengling ZhangAbstract:Inverted Transparent Polymer solar cells were fabricated by sequentially depositing several organic layers from fluids, on ITO/glass substrates. ITO was used as a cathode to collect electrons. The photovoltage of these diodes can be increased by up to 400 mV by inserting a buffer layer of polyethylene oxide between ITO and the active layers, which results in 4-fold enhancement of power conversion efficiency under the illumination of 100 mW/cm2 simulated AM1.5 solar light. The enhancement of Voc is consistent with the work function change between ITO and ITO/PEO measured by photoelectron spectroscopy. Solar cell production without vacuum processing may lower production costs. © 2008 Elsevier B.V. All rights reserved.
Olle Inganäs - One of the best experts on this subject based on the ideXlab platform.
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inverted and Transparent Polymer solar cells prepared with vacuum free processing
Solar Energy Materials and Solar Cells, 2009Co-Authors: Yinhua Zhou, Sophie Barrau, Wenjing Tian, Olle Inganäs, Fenghong Li, Fengling ZhangAbstract:Inverted Transparent Polymer solar cells were fabricated by sequentially depositing several organic layers from fluids, on ITO/glass substrates. ITO was used as a cathode to collect electrons. The photovoltage of these diodes can be increased by up to 400 mV by inserting a buffer layer of polyethylene oxide between ITO and the active layers, which results in 4-fold enhancement of power conversion efficiency under the illumination of 100 mW/cm2 simulated AM1.5 solar light. The enhancement of Voc is consistent with the work function change between ITO and ITO/PEO measured by photoelectron spectroscopy. Solar cell production without vacuum processing may lower production costs.
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Transparent Polymer cathode for organic photovoltaic devices
Synthetic Metals, 2006Co-Authors: Abay Gadisa, Shimelis Admassie, Lisa Lindell, Xavier Crispin, William R. Salaneck, Kristofer Tvingstedt, Mats Andersson, Olle InganäsAbstract:A prototype solar cell with a Transparent Polymer cathode and an ITO/poly(3,4-ethylene dioxythiophene)-poly(styrene sulfonate) (PEDOT:PSS) anode was fabricated. As an active layer, a thin film of a bulk heterojunction of polyfluorene coPolymer, poly[2,7-(9,9-dioctyl-fluorene)-alt-5,5-(4',7'-di-2-thienyl-2',1',3'-benzothiadiazole)] (APFO-3) and an electron acceptor mol. [6,6]-phenyl-C61-butyric acid Me ester (PCBM) (1:4 by wt.) was sandwiched between the 2 Transparent Polymer electrodes. The cathode is another form of PEDOT formed by vapor phase polymd. PEDOT (VPP PEDOT) with a cond. 102-103 S/cm. The cathode is supported on an elastomeric substrate and forms a conformal contact to the APFO-3/PCBM blend. Transparent solar cells are useful for building multilayer and tandem solar cells. [on SciFinder (R)]
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Transparent Polymer cathode for organic photovoltaic devices
Synthetic Metals, 2006Co-Authors: Abay Gadisa, Shimelis Admassie, Olle Inganäs, Mats R. Andersson, Lisa Lindell, Xavier Crispin, William R. Salaneck, Kristofer Tvingstedt, Olle InganäsAbstract:We demonstrate a prototype solar cell with a Transparent Polymer cathode, and indium-tin-oxide (ITO)/poly (3, 4-ethylene dioxythiophene)-poly (styrene sulphonate) (PEDOT:PSS) anode. As an active layer, thin film of a bulk heterojunction of polyfluorene coPolymer poly[2,7-(9,9-dioctyl-fluorene)-alt-5,5-(4?,7?-di-2thienyl-2?,1?3?-benzothiadiazole)] (APFO-3) and an electron acceptor molecule [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) (1:4 wt.) was sandwiched between the two Transparent Polymer electrodes. The cathode is another form of PEDOT formed by vapor phase Polymerised PEDOT (VPP PEDOT) of conductivity 102-103 S/cm. The cathode is supported on an elastomeric substrate, and forms a conformal contact to the APFO-3/PCBM blend. Transparent solar cells are useful for building multilayer and tandem solar cells. © 2006 Elsevier B.V. All rights reserved.
Uli Lemmer - One of the best experts on this subject based on the ideXlab platform.
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solution processed Polymer silver nanowire top electrodes for inverted semi Transparent solar cells
Organic Electronics, 2013Co-Authors: Manuel Reinhard, Anatoliy Slobodskyy, Ralph Eckstein, Uli Lemmer, Alexander ColsmannAbstract:Abstract We present a Transparent, fully solution-processed top anode system comprising a thin, conductive Polymer interlayer below a silver nanowire mesh for efficient organic electronic devices. We fabricate inverted semi-Transparent Polymer solar cells exhibiting power conversion efficiencies that are comparable to devices incorporating an opaque electrode. By means of scanning electron microscopy and light beam induced photocurrent measurements we show that the thin Polymer interlayer facilitates charge extraction from the active layer and efficient transport to the metallic nanowire mesh.
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Solution-processed Polymer-silver nanowire top electrodes for inverted semi-Transparent solar cells
Organic Electronics: physics, materials, applications, 2013Co-Authors: Manuel Reinhard, Anatoliy Slobodskyy, Ralph Eckstein, Uli Lemmer, Alexander ColsmannAbstract:We present a Transparent, fully solution-processed top anode system comprising a thin, conductive Polymer interlayer below a silver nanowire mesh for efficient organic electronic devices. We fabricate inverted semi-Transparent Polymer solar cells exhibiting power conversion efficiencies that are comparable to devices incorporating an opaque electrode. By means of scanning electron microscopy and light beam induced photocurrent measurements we show that the thin Polymer interlayer facilitates charge extraction from the active layer and efficient transport to the metallic nanowire mesh. ?? 2012 Elsevier B.V. All rights reserved.
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cathodes comprising highly conductive poly 3 4 ethylenedioxythiophene poly styrenesulfonate for semi Transparent Polymer solar cells
Organic Electronics, 2010Co-Authors: Felix Nickel, Andreas Puetz, Christian Kayser, Manuel Reinhard, Alexander Colsmann, Hung Do, Uli LemmerAbstract:Abstract Semi-Transparent Polymer solar cells from a blend of poly-(3-hexylthiophene-2,5-diyl) and [6,6]-phenyl C61 butyric acid methyl ester (P3HT:PCBM) comprising a poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) cathode and a vacuum deposited n-doped organic buffer layer have been realized. Among the investigated organic material systems for n-doping, the use of lithium doped bathophenanthroline (BPhen:Li) allowed for proper energy level alignment and subsequently for an open-circuit voltage Voc ≈ 600 mV. Upon deposition the PEDOT:PSS adheres selectively on the BPhen:Li buffer layer in order to form the laterally defined Transparent cathode.
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Cathodes comprising highly conductive poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) for semi-Transparent Polymer solar cells
Organic Electronics: physics, materials, applications, 2010Co-Authors: Felix Nickel, Andreas Puetz, Christian Kayser, Manuel Reinhard, Alexander Colsmann, Hung Do, Uli LemmerAbstract:Semi-Transparent Polymer solar cells from a blend of poly-(3-hexylthiophene-2,5-diyl) and [6,6]-phenyl C61 butyric acid methyl ester (P3HT:PCBM) comprising a poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) cathode and a vacuum deposited n-doped organic buffer layer have been realized. Among the investigated organic material systems for n-doping, the use of lithium doped bathophenanthroline (BPhen:Li) allowed for proper energy level alignment and subsequently for an open-circuit voltage Voc ??? 600 mV. Upon deposition the PEDOT:PSS adheres selectively on the BPhen:Li buffer layer in order to form the laterally defined Transparent cathode. ?? 2009 Elsevier B.V. All rights reserved.
