The Experts below are selected from a list of 39963 Experts worldwide ranked by ideXlab platform
Kazunari Matsuda - One of the best experts on this subject based on the ideXlab platform.
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Fabrication of single-walled carbon nanotube/Si heterojunction solar cell with high Photovoltaic Conversion efficiency and stability
arXiv: Materials Science, 2013Co-Authors: Feijiu Wang, Daichi Kozawa, Yuhei Miyauchi, Kazushi Hiraoka, Shinichiro Mouri, Yutaka Ohno, Kazunari MatsudaAbstract:The Photovoltaic properties of carbon nanotube/Si heterojunction solar cells were investigated using network films of high quality single-walled carbon nanotubes (SWNTs) grown by atmospheric-pressure floating-catalyst chemical vapor deposition. Because of the optimization of the device window size and the utilization of SWNT thin films with both low resistivity and high transparency, a high Photovoltaic Conversion efficiency of greater than 12% was achieved for SWNTs/Si heterojunction solar cells without any post processing, such as carrier doping treatment. In addition, the high stability and reproducibility of the Photovoltaic performance of these devices in air was demonstrated.
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Enhancement Mechanism of the Photovoltaic Conversion Efficiency of Single-Walled Carbon Nanotube/Si Solar Cells by HNO3 Doping
Applied Physics Express, 2013Co-Authors: Feijiu Wang, Daichi Kozawa, Yuhei Miyauchi, Kazushi Hiraoka, Shinichiro Mouri, Kazunari MatsudaAbstract:We studied the enhancement mechanism of the Photovoltaic Conversion efficiency of single-walled carbon nanotube (SWNT)/Si heterojunction solar cells by nitric acid (HNO3) doping in the dried condition. The Conversion efficiency enhanced by HNO3 doping strongly depends on the thickness of the SWNT network film. From the analysis of thickness-dependent current–voltage characteristics, we found that the enhancement resulted from not only a decrease in the series resistance of the SWNT network film, but also an increase in the p–n junction density due to an increase in the carrier density of SWNTs.
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Analysis of the Photovoltaic Properties of Single-Walled Carbon Nanotube/Silicon Heterojunction Solar Cells
Applied Physics Express, 2012Co-Authors: Daichi Kozawa, Yuhei Miyauchi, Kazushi Hiraoka, Shinichiro Mouri, Kazunari MatsudaAbstract:We studied the Photovoltaic properties of single-walled carbon nanotube/Si (SWNT/Si) heterojunction cells. We observed an optimal thickness of the SWNT network film that maximizes the Photovoltaic Conversion efficiency. The spectra of incident photon to charge carrier efficiency indicate that the production of carriers in the Si layer mainly contributes to the Photovoltaic Conversion. The experimental results and loss analysis based on the equivalent circuit model suggest that the fabrication of a high-density semiconducting SWNT network at the interface of Si is the key to improving the Conversion efficiency of the SWNT/n-Si heterojunction solar cell.
Daichi Kozawa - One of the best experts on this subject based on the ideXlab platform.
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Fabrication of single-walled carbon nanotube/Si heterojunction solar cell with high Photovoltaic Conversion efficiency and stability
arXiv: Materials Science, 2013Co-Authors: Feijiu Wang, Daichi Kozawa, Yuhei Miyauchi, Kazushi Hiraoka, Shinichiro Mouri, Yutaka Ohno, Kazunari MatsudaAbstract:The Photovoltaic properties of carbon nanotube/Si heterojunction solar cells were investigated using network films of high quality single-walled carbon nanotubes (SWNTs) grown by atmospheric-pressure floating-catalyst chemical vapor deposition. Because of the optimization of the device window size and the utilization of SWNT thin films with both low resistivity and high transparency, a high Photovoltaic Conversion efficiency of greater than 12% was achieved for SWNTs/Si heterojunction solar cells without any post processing, such as carrier doping treatment. In addition, the high stability and reproducibility of the Photovoltaic performance of these devices in air was demonstrated.
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Enhancement Mechanism of the Photovoltaic Conversion Efficiency of Single-Walled Carbon Nanotube/Si Solar Cells by HNO3 Doping
Applied Physics Express, 2013Co-Authors: Feijiu Wang, Daichi Kozawa, Yuhei Miyauchi, Kazushi Hiraoka, Shinichiro Mouri, Kazunari MatsudaAbstract:We studied the enhancement mechanism of the Photovoltaic Conversion efficiency of single-walled carbon nanotube (SWNT)/Si heterojunction solar cells by nitric acid (HNO3) doping in the dried condition. The Conversion efficiency enhanced by HNO3 doping strongly depends on the thickness of the SWNT network film. From the analysis of thickness-dependent current–voltage characteristics, we found that the enhancement resulted from not only a decrease in the series resistance of the SWNT network film, but also an increase in the p–n junction density due to an increase in the carrier density of SWNTs.
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Analysis of the Photovoltaic Properties of Single-Walled Carbon Nanotube/Silicon Heterojunction Solar Cells
Applied Physics Express, 2012Co-Authors: Daichi Kozawa, Yuhei Miyauchi, Kazushi Hiraoka, Shinichiro Mouri, Kazunari MatsudaAbstract:We studied the Photovoltaic properties of single-walled carbon nanotube/Si (SWNT/Si) heterojunction cells. We observed an optimal thickness of the SWNT network film that maximizes the Photovoltaic Conversion efficiency. The spectra of incident photon to charge carrier efficiency indicate that the production of carriers in the Si layer mainly contributes to the Photovoltaic Conversion. The experimental results and loss analysis based on the equivalent circuit model suggest that the fabrication of a high-density semiconducting SWNT network at the interface of Si is the key to improving the Conversion efficiency of the SWNT/n-Si heterojunction solar cell.
Yuhei Miyauchi - One of the best experts on this subject based on the ideXlab platform.
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Fabrication of single-walled carbon nanotube/Si heterojunction solar cell with high Photovoltaic Conversion efficiency and stability
arXiv: Materials Science, 2013Co-Authors: Feijiu Wang, Daichi Kozawa, Yuhei Miyauchi, Kazushi Hiraoka, Shinichiro Mouri, Yutaka Ohno, Kazunari MatsudaAbstract:The Photovoltaic properties of carbon nanotube/Si heterojunction solar cells were investigated using network films of high quality single-walled carbon nanotubes (SWNTs) grown by atmospheric-pressure floating-catalyst chemical vapor deposition. Because of the optimization of the device window size and the utilization of SWNT thin films with both low resistivity and high transparency, a high Photovoltaic Conversion efficiency of greater than 12% was achieved for SWNTs/Si heterojunction solar cells without any post processing, such as carrier doping treatment. In addition, the high stability and reproducibility of the Photovoltaic performance of these devices in air was demonstrated.
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Enhancement Mechanism of the Photovoltaic Conversion Efficiency of Single-Walled Carbon Nanotube/Si Solar Cells by HNO3 Doping
Applied Physics Express, 2013Co-Authors: Feijiu Wang, Daichi Kozawa, Yuhei Miyauchi, Kazushi Hiraoka, Shinichiro Mouri, Kazunari MatsudaAbstract:We studied the enhancement mechanism of the Photovoltaic Conversion efficiency of single-walled carbon nanotube (SWNT)/Si heterojunction solar cells by nitric acid (HNO3) doping in the dried condition. The Conversion efficiency enhanced by HNO3 doping strongly depends on the thickness of the SWNT network film. From the analysis of thickness-dependent current–voltage characteristics, we found that the enhancement resulted from not only a decrease in the series resistance of the SWNT network film, but also an increase in the p–n junction density due to an increase in the carrier density of SWNTs.
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Analysis of the Photovoltaic Properties of Single-Walled Carbon Nanotube/Silicon Heterojunction Solar Cells
Applied Physics Express, 2012Co-Authors: Daichi Kozawa, Yuhei Miyauchi, Kazushi Hiraoka, Shinichiro Mouri, Kazunari MatsudaAbstract:We studied the Photovoltaic properties of single-walled carbon nanotube/Si (SWNT/Si) heterojunction cells. We observed an optimal thickness of the SWNT network film that maximizes the Photovoltaic Conversion efficiency. The spectra of incident photon to charge carrier efficiency indicate that the production of carriers in the Si layer mainly contributes to the Photovoltaic Conversion. The experimental results and loss analysis based on the equivalent circuit model suggest that the fabrication of a high-density semiconducting SWNT network at the interface of Si is the key to improving the Conversion efficiency of the SWNT/n-Si heterojunction solar cell.
Kazushi Hiraoka - One of the best experts on this subject based on the ideXlab platform.
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Fabrication of single-walled carbon nanotube/Si heterojunction solar cell with high Photovoltaic Conversion efficiency and stability
arXiv: Materials Science, 2013Co-Authors: Feijiu Wang, Daichi Kozawa, Yuhei Miyauchi, Kazushi Hiraoka, Shinichiro Mouri, Yutaka Ohno, Kazunari MatsudaAbstract:The Photovoltaic properties of carbon nanotube/Si heterojunction solar cells were investigated using network films of high quality single-walled carbon nanotubes (SWNTs) grown by atmospheric-pressure floating-catalyst chemical vapor deposition. Because of the optimization of the device window size and the utilization of SWNT thin films with both low resistivity and high transparency, a high Photovoltaic Conversion efficiency of greater than 12% was achieved for SWNTs/Si heterojunction solar cells without any post processing, such as carrier doping treatment. In addition, the high stability and reproducibility of the Photovoltaic performance of these devices in air was demonstrated.
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Enhancement Mechanism of the Photovoltaic Conversion Efficiency of Single-Walled Carbon Nanotube/Si Solar Cells by HNO3 Doping
Applied Physics Express, 2013Co-Authors: Feijiu Wang, Daichi Kozawa, Yuhei Miyauchi, Kazushi Hiraoka, Shinichiro Mouri, Kazunari MatsudaAbstract:We studied the enhancement mechanism of the Photovoltaic Conversion efficiency of single-walled carbon nanotube (SWNT)/Si heterojunction solar cells by nitric acid (HNO3) doping in the dried condition. The Conversion efficiency enhanced by HNO3 doping strongly depends on the thickness of the SWNT network film. From the analysis of thickness-dependent current–voltage characteristics, we found that the enhancement resulted from not only a decrease in the series resistance of the SWNT network film, but also an increase in the p–n junction density due to an increase in the carrier density of SWNTs.
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Analysis of the Photovoltaic Properties of Single-Walled Carbon Nanotube/Silicon Heterojunction Solar Cells
Applied Physics Express, 2012Co-Authors: Daichi Kozawa, Yuhei Miyauchi, Kazushi Hiraoka, Shinichiro Mouri, Kazunari MatsudaAbstract:We studied the Photovoltaic properties of single-walled carbon nanotube/Si (SWNT/Si) heterojunction cells. We observed an optimal thickness of the SWNT network film that maximizes the Photovoltaic Conversion efficiency. The spectra of incident photon to charge carrier efficiency indicate that the production of carriers in the Si layer mainly contributes to the Photovoltaic Conversion. The experimental results and loss analysis based on the equivalent circuit model suggest that the fabrication of a high-density semiconducting SWNT network at the interface of Si is the key to improving the Conversion efficiency of the SWNT/n-Si heterojunction solar cell.
Shinichiro Mouri - One of the best experts on this subject based on the ideXlab platform.
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Fabrication of single-walled carbon nanotube/Si heterojunction solar cell with high Photovoltaic Conversion efficiency and stability
arXiv: Materials Science, 2013Co-Authors: Feijiu Wang, Daichi Kozawa, Yuhei Miyauchi, Kazushi Hiraoka, Shinichiro Mouri, Yutaka Ohno, Kazunari MatsudaAbstract:The Photovoltaic properties of carbon nanotube/Si heterojunction solar cells were investigated using network films of high quality single-walled carbon nanotubes (SWNTs) grown by atmospheric-pressure floating-catalyst chemical vapor deposition. Because of the optimization of the device window size and the utilization of SWNT thin films with both low resistivity and high transparency, a high Photovoltaic Conversion efficiency of greater than 12% was achieved for SWNTs/Si heterojunction solar cells without any post processing, such as carrier doping treatment. In addition, the high stability and reproducibility of the Photovoltaic performance of these devices in air was demonstrated.
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Enhancement Mechanism of the Photovoltaic Conversion Efficiency of Single-Walled Carbon Nanotube/Si Solar Cells by HNO3 Doping
Applied Physics Express, 2013Co-Authors: Feijiu Wang, Daichi Kozawa, Yuhei Miyauchi, Kazushi Hiraoka, Shinichiro Mouri, Kazunari MatsudaAbstract:We studied the enhancement mechanism of the Photovoltaic Conversion efficiency of single-walled carbon nanotube (SWNT)/Si heterojunction solar cells by nitric acid (HNO3) doping in the dried condition. The Conversion efficiency enhanced by HNO3 doping strongly depends on the thickness of the SWNT network film. From the analysis of thickness-dependent current–voltage characteristics, we found that the enhancement resulted from not only a decrease in the series resistance of the SWNT network film, but also an increase in the p–n junction density due to an increase in the carrier density of SWNTs.
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Analysis of the Photovoltaic Properties of Single-Walled Carbon Nanotube/Silicon Heterojunction Solar Cells
Applied Physics Express, 2012Co-Authors: Daichi Kozawa, Yuhei Miyauchi, Kazushi Hiraoka, Shinichiro Mouri, Kazunari MatsudaAbstract:We studied the Photovoltaic properties of single-walled carbon nanotube/Si (SWNT/Si) heterojunction cells. We observed an optimal thickness of the SWNT network film that maximizes the Photovoltaic Conversion efficiency. The spectra of incident photon to charge carrier efficiency indicate that the production of carriers in the Si layer mainly contributes to the Photovoltaic Conversion. The experimental results and loss analysis based on the equivalent circuit model suggest that the fabrication of a high-density semiconducting SWNT network at the interface of Si is the key to improving the Conversion efficiency of the SWNT/n-Si heterojunction solar cell.