The Experts below are selected from a list of 1935 Experts worldwide ranked by ideXlab platform
Nobuaki Kojima - One of the best experts on this subject based on the ideXlab platform.
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Analysis for efficiency potential of high‐efficiency and next‐generation solar cells
Progress in Photovoltaics: Research and Applications, 2017Co-Authors: Masafumi Yamaguchi, Kan-hua Lee, Kenji Araki, Nobuaki Kojima, Hiroyuki Yamada, Yasuhiro KatsumataAbstract:This paper overviews photovoltaic R&D projects in Japan. Recently, world-record and second highest efficiencies of various types of solar cells have been demonstrated under the New Energy and Industrial Technology Development Organization Project: 44.4% (under concentration) and 37.9% (under 1 sun) InGaP/GaAs/InGaAs inverted metamorphic 3-junction solar cells by Sharp, 26.7% single crystalline Si heterojunction back-contact solar cell by Kaneka, 22.3% copper indium gallium selenide solar cell by Solar Frontier, a-Si/μc-Si/μc-Si thin-film triple-junction solar cell with stabilized efficiency of 14.0% by AIST, 11.9% dye-sensitized solar cell by Sharp, and 11.2% organic solar cell by Toshiba. This paper also presents efficiency potential of high-efficiency and next-generation solar cells analyzed by considering external radiative efficiency, open-circuit voltage loss, and fill factor loss. Efficiency potential of crystalline Si, GaAs, III-V compound 3-junction and 5-junction, CIGSe, CdTe, CZTS(Se), multiquantum well, and quantum dot and perovskite solar cells is shown to be 28.5%, 29.7%, 40%, 43%, 26.5%, 26.5%, 20%, 25.8%, and 24.9% under 1 sun, respectively.
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Efficiency potential and recent activities of high-efficiency solar cells
Journal of Materials Research, 2017Co-Authors: Masafumi Yamaguchi, Kan-hua Lee, Kenji Araki, Hiroyuki Yamada, Yasuhiro Katsumata, Nobuaki KojimaAbstract:The present status of R&D for various types of solar cells is presented by overviewing research and development projects for solar cells in Japan as the PV R&D Project Leader of the New Energy and Industrial Technology Development Organization (NEDO) and the Japan Science and Technology Agency (JST). Developments of high-efficiency solar cells such as 44.4% (under concentration) and 37.9% (under 1-sun) InGaP/GaAs/InGaAs 3-junction solar cells by Sharp, 26.6% crystalline Si heterojunction back-contact (HBC) solar cells by Kaneka, 22.3% CIGS solar cells by Solar Frontier have been demonstrated under the NEDO PV R&D Project. 15.0% efficiency has also been attained with 1 cm^2 perovskite solar cell by NIMS under the JST Project. This article also presents analytical results for efficiency potential of high-efficiency solar cells based on external radiative efficiency (ERE), open-circuit voltage loss and fill factor loss. Crystalline Si solar cells, GaAs, III–V compound 3-junction and 5-junction, CIGSe, and CdTe solar cells have efficiency potential of 28.5%, 29.7%, 42%, 43%, 26.5%, and 26.5% under 1-sun condition, respectively, by improvements in ERE.
Wolfgang Ramlow - One of the best experts on this subject based on the ideXlab platform.
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Prospective crossover study for a standardized comparison of the dextrane sulfate whole blood and plasma apheresis system in patients with cardiovascular disease and severe dyslipidemia.
Atherosclerosis. Supplements, 2017Co-Authors: Wolfgang Ramlow, H Prophet, Grit WaitzAbstract:The objective of this study was a standardized comparison of the safety and effectiveness of the Kaneka (Kaneka Corporation, Osaka, Japan) whole blood (Liposorber DL-100) and plasma (Liposorber LA-15) lipoprotein apheresis (LA) system to optimize the individual therapy of patients with cardiovascular disease and severe dyslipidemia. Six chronic LA patients with a pre-treatment LDL-C < 6 mmol/l in steady state received a total of three treatments with the LA-15 device, followed by three treatments with the DL-100 device or vice versa. To achieve a standardized comparison the treated blood volume for any patient was kept identical for both procedures. Sampling points for total cholesterol, LDL-C, HDL-C, Lp(a), triglyceride, blood count, and bradykinin measurements were adjusted for both techniques. Total cholesterol, LDL-C, HDL-C, Lp(a), and triglycerides were reduced by 59.2 ± 6.5%, 79.3 ± 6.9%, 7.1 ± 3.9%, 87.3 ± 3.1%, 22.5 ± 24.2% using the DL-100 system and by 51.4 ± 5.2%, 65.2 ± 3.7%, 2.2 ± 4.9%, 72.7 ± 2.2%, 46.5 ± 9.4% using the LA-15 system, showing that the DL-100 adsorber was significantly more effective for lowering total cholesterol (p = 0.044), LDL-C (p = 0.001), Lp(a) (p = 0.029), while triglycerides were reduced to a higher extent by the plasma system (p = 0.046) in this patient group. The regenerable LA-15 adsorber columns showed a higher removal capacity considering the difference between inflow and outflow concentrations. Bradykinin levels significantly increased up to 145 fold in the outflow lines using the plasma system (p = 0.028), but not systemically. There was no significant bradykinin generation using the whole blood adsorber. In conclusion, the whole blood system was faster and more effective in this LA patient group with pre apheresis LDL-C<6 mmol/l. Whether the regenerable plasma system is more effective in patients with higher LDL-C content should be evaluated in future standardized comparisons. Copyright © 2017 Elsevier B.V. All rights reserved.
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Release of microparticles in LDL apheresis.
Transfusion and apheresis science : official journal of the World Apheresis Association : official journal of the European Society for Haemapheresis, 2001Co-Authors: Goran Matic, Konrad Martins, Peter Ahrenholz, Michael Tiess, Roland E. Winkler, Wolfgang RamlowAbstract:Abstract Particle contamination of blood always takes place in extracorporeal systems and few studies have been conducted to evaluate potential risks. Particle concentration was measured in the efferent blood line on original equipment for two established LDL elimination procedures (DALI) ( Fresenius ) and Liposorber ( Kaneka ). Acquired data were compared with standards for infusion solutions from European (EP) and American (USP) Pharmacopoeia. All values were well below the given limits. Even in extreme situations (>20 pump stops) particle concentration did not exceed the standards. Considering an average treated blood volume of 7.3 l for the DALI-System and 17.0 l for Liposorber (long term clinical studies) the absolute amount of particles infused per treatment was 167 000 (DALI) and 465 000 (Liposorber) particles ⩾2 μm.
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Particle release in extracorporeal low-density lipoprotein lowering therapies.
Artificial organs, 2000Co-Authors: Konrad Martins, Goran Matic, Peter Ahrenholz, Michael Tiess, Roland E. Winkler, Doris Hofmann, Wolfgang RamlowAbstract:Release of microparticles into the blood during extracorporeal circulation must be kept low because of possibly serious acute and chronic adverse effects. Concentration and size distribution of microparticles were measured during simulated treatments (n = 7) on original equipment for 2 standard low-density lipoprotein (LDL) elimination procedures (DALI 750, Fresenius AG, St. Wendel, Germany and Liposorber, Kaneka Corporation, Osaka, Japan) and compared to hemofiltration solutions. For both systems as well as in hemofiltration solutions, the mean particle concentrations in 500 ml portions gathered from the efferent blood line stayed below 10% of pharmacopoeia standards for infusion solutions (United States Pharmacopoeia, European Pharmacopoeia) in all measured size classes. Although particle concentrations were comparable in all systems, the mean total number of particles > or =2 microm released per session was lowest in the DALI (167,000) compared to the Liposorber (465,000) and hemofiltration solutions (2,240,000). This was mainly due to different total processed blood volumes necessary to achieve the required LDL reduction.
Yasuhiro Katsumata - One of the best experts on this subject based on the ideXlab platform.
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Analysis for efficiency potential of high‐efficiency and next‐generation solar cells
Progress in Photovoltaics: Research and Applications, 2017Co-Authors: Masafumi Yamaguchi, Kan-hua Lee, Kenji Araki, Nobuaki Kojima, Hiroyuki Yamada, Yasuhiro KatsumataAbstract:This paper overviews photovoltaic R&D projects in Japan. Recently, world-record and second highest efficiencies of various types of solar cells have been demonstrated under the New Energy and Industrial Technology Development Organization Project: 44.4% (under concentration) and 37.9% (under 1 sun) InGaP/GaAs/InGaAs inverted metamorphic 3-junction solar cells by Sharp, 26.7% single crystalline Si heterojunction back-contact solar cell by Kaneka, 22.3% copper indium gallium selenide solar cell by Solar Frontier, a-Si/μc-Si/μc-Si thin-film triple-junction solar cell with stabilized efficiency of 14.0% by AIST, 11.9% dye-sensitized solar cell by Sharp, and 11.2% organic solar cell by Toshiba. This paper also presents efficiency potential of high-efficiency and next-generation solar cells analyzed by considering external radiative efficiency, open-circuit voltage loss, and fill factor loss. Efficiency potential of crystalline Si, GaAs, III-V compound 3-junction and 5-junction, CIGSe, CdTe, CZTS(Se), multiquantum well, and quantum dot and perovskite solar cells is shown to be 28.5%, 29.7%, 40%, 43%, 26.5%, 26.5%, 20%, 25.8%, and 24.9% under 1 sun, respectively.
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Efficiency potential and recent activities of high-efficiency solar cells
Journal of Materials Research, 2017Co-Authors: Masafumi Yamaguchi, Kan-hua Lee, Kenji Araki, Hiroyuki Yamada, Yasuhiro Katsumata, Nobuaki KojimaAbstract:The present status of R&D for various types of solar cells is presented by overviewing research and development projects for solar cells in Japan as the PV R&D Project Leader of the New Energy and Industrial Technology Development Organization (NEDO) and the Japan Science and Technology Agency (JST). Developments of high-efficiency solar cells such as 44.4% (under concentration) and 37.9% (under 1-sun) InGaP/GaAs/InGaAs 3-junction solar cells by Sharp, 26.6% crystalline Si heterojunction back-contact (HBC) solar cells by Kaneka, 22.3% CIGS solar cells by Solar Frontier have been demonstrated under the NEDO PV R&D Project. 15.0% efficiency has also been attained with 1 cm^2 perovskite solar cell by NIMS under the JST Project. This article also presents analytical results for efficiency potential of high-efficiency solar cells based on external radiative efficiency (ERE), open-circuit voltage loss and fill factor loss. Crystalline Si solar cells, GaAs, III–V compound 3-junction and 5-junction, CIGSe, and CdTe solar cells have efficiency potential of 28.5%, 29.7%, 42%, 43%, 26.5%, and 26.5% under 1-sun condition, respectively, by improvements in ERE.
Kenji Yamamoto - One of the best experts on this subject based on the ideXlab platform.
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Mass productions of thin film silicon PV modules
Solar Energy Materials and Solar Cells, 2003Co-Authors: Yuko Tawada, Hideo Yamagishi, Kenji YamamotoAbstract:Abstract Mass production technologies of a-Si single junction and a-Si/poly-Si hybrid modules with stable 8% and 10% efficiency were developed in the Shiga factory of Kaneka Corporation. Kaneka instituted Kaneka Solartech Corporation (KST) as a subsidiary company of 100% shareholder and invested 20 MW production plant in Toyooka City in 1999. There are fully automatic thin film fabrication equipments. KST started the manufacturing amorphous silicon PV modules in 1999 and those of hybrid type PV modules in 2001. The largest size glass substrates used for these modules are 95×98 cm and variable size of modules are being produced by cutting these large area base modules. Recent production yields are higher than 98%. Production technologies of a-Si, thin c-Si and solar cells, performances of modules, applications to the rooftop PV systems will be presented. We estimate the production cost of a-Si solar modules and a-Si/thin c-Si hybrid solar modules. The future business plan of our new type solar modules and our production lines will be discussed.
Masafumi Yamaguchi - One of the best experts on this subject based on the ideXlab platform.
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Analysis for efficiency potential of high‐efficiency and next‐generation solar cells
Progress in Photovoltaics: Research and Applications, 2017Co-Authors: Masafumi Yamaguchi, Kan-hua Lee, Kenji Araki, Nobuaki Kojima, Hiroyuki Yamada, Yasuhiro KatsumataAbstract:This paper overviews photovoltaic R&D projects in Japan. Recently, world-record and second highest efficiencies of various types of solar cells have been demonstrated under the New Energy and Industrial Technology Development Organization Project: 44.4% (under concentration) and 37.9% (under 1 sun) InGaP/GaAs/InGaAs inverted metamorphic 3-junction solar cells by Sharp, 26.7% single crystalline Si heterojunction back-contact solar cell by Kaneka, 22.3% copper indium gallium selenide solar cell by Solar Frontier, a-Si/μc-Si/μc-Si thin-film triple-junction solar cell with stabilized efficiency of 14.0% by AIST, 11.9% dye-sensitized solar cell by Sharp, and 11.2% organic solar cell by Toshiba. This paper also presents efficiency potential of high-efficiency and next-generation solar cells analyzed by considering external radiative efficiency, open-circuit voltage loss, and fill factor loss. Efficiency potential of crystalline Si, GaAs, III-V compound 3-junction and 5-junction, CIGSe, CdTe, CZTS(Se), multiquantum well, and quantum dot and perovskite solar cells is shown to be 28.5%, 29.7%, 40%, 43%, 26.5%, 26.5%, 20%, 25.8%, and 24.9% under 1 sun, respectively.
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Efficiency potential and recent activities of high-efficiency solar cells
Journal of Materials Research, 2017Co-Authors: Masafumi Yamaguchi, Kan-hua Lee, Kenji Araki, Hiroyuki Yamada, Yasuhiro Katsumata, Nobuaki KojimaAbstract:The present status of R&D for various types of solar cells is presented by overviewing research and development projects for solar cells in Japan as the PV R&D Project Leader of the New Energy and Industrial Technology Development Organization (NEDO) and the Japan Science and Technology Agency (JST). Developments of high-efficiency solar cells such as 44.4% (under concentration) and 37.9% (under 1-sun) InGaP/GaAs/InGaAs 3-junction solar cells by Sharp, 26.6% crystalline Si heterojunction back-contact (HBC) solar cells by Kaneka, 22.3% CIGS solar cells by Solar Frontier have been demonstrated under the NEDO PV R&D Project. 15.0% efficiency has also been attained with 1 cm^2 perovskite solar cell by NIMS under the JST Project. This article also presents analytical results for efficiency potential of high-efficiency solar cells based on external radiative efficiency (ERE), open-circuit voltage loss and fill factor loss. Crystalline Si solar cells, GaAs, III–V compound 3-junction and 5-junction, CIGSe, and CdTe solar cells have efficiency potential of 28.5%, 29.7%, 42%, 43%, 26.5%, and 26.5% under 1-sun condition, respectively, by improvements in ERE.