The Experts below are selected from a list of 129 Experts worldwide ranked by ideXlab platform

Pierre J. Verlinden - One of the best experts on this subject based on the ideXlab platform.

  • 335-W World-Record p-Type Monocrystalline Module With 20.6% Efficient PERC Solar Cells
    IEEE Journal of Photovoltaics, 2016
    Co-Authors: Zhang Shu, Weiwei Deng, Xiujuan Pan, Haijun Jiao, Xu Jianmei, Yifeng Chen, Pietro P. Altermatt, Zhiqiang Feng, Pierre J. Verlinden
    Abstract:

    The objective of this study is to optimize Module technologies to obtain the lowest price per Watt peak ($/Wp) ratio and the maximum power output of a Flat-Plate Module for a given number of high-efficiency solar cells. Using B-doped p-type monocrystalline Cz silicon wafers, 500 pieces of full square $ 156\;\text{mm} \times 156\;\text{mm}$ solar cells with a passivated emitter and rear local contacts (PERC) were fabricated with an average efficiency of 20.6% by in-house measurement. The Module includes half-cells for low interconnection losses, as well as a novel light-trapping scheme including light capture ribbon connected to the cells and a structured light reflective film between cells combined with an optimized large cell gap. The Module using 60 pieces of the 20.6% efficient PERC solar cells has achieved a new world record, with a peak power output of 335.2 ${\rm W_{p}}$ in September 2014, demonstrating a large cell-to-Module factor, which is defined as $P_{{\rm mmp}}$ of Module divided by the sum of cell $P_{{\rm mmp}}$ . The CTM factor of the champion Module is greater than 1.11.

  • Development of chip-size silicon solar cells
    Conference Record of the Twenty-Eighth IEEE Photovoltaic Specialists Conference - 2000 (Cat. No.00CH37036), 1
    Co-Authors: William P. Mulligan, David D. Smith, A. Terao, Pierre J. Verlinden, R. M. Swanson
    Abstract:

    SunPower is developing a novel 250-Sun concentrator Module that, because of a compact nonimaging optics design, is very low profile and looks much like a conventional Flat Plate Module. This "micro-concentrator" requires very small, "chip-size" solar cells, with approximate dimensions of 2.3/spl times/2.3 mm. The authors have adapted their all-back point-contact silicon solar cell technology to this application. This cell technology has several advantages over competing Ill-V technologies including lower cost, elimination of grid shading, and more tolerance of nonuniform and off-normal cell illumination due to all-backside carrier collection and texture, respectively. A major problem for such small silicon cells, however, is the efficiency loss due to the sawed edges of the cell. An "edge surface field" created by a through-wafer diffusion is one possible solution to the problem. Modeling and preliminary experimental results are presented.

K Yoshioka - One of the best experts on this subject based on the ideXlab platform.

  • Performance improvement of a static concentrator Module with an asymmetric v-groove backsheet structure
    Solar Energy Materials and Solar Cells, 2003
    Co-Authors: Kenji Koizumi, K Yoshioka, K Sugita, Tadashi Saitoh
    Abstract:

    A light-trapping type concentrator Module with a new asymmetric V-groove structure at the rear surface is proposed to improve the performance of static concentrator Module. Fundamental optical properties of various asymmetric V-grooves are calculated using a ray-tracing method. Based on these results, yearly integrated irradiance ratios of the concentrator Module to a conventional Flat-Plate Module are calculated using meteorological data. By the use of Ag as a reflection material, yearly integrated irradiance ratio of concentrator Module with an asymmetric V-groove is 1.34, and the occupation area of Si cells in a Module can be reduced to 74% compared with a conventional Flat-Plate Module.

  • Improved design of a three‐dimensional, static concentrator lens using meteorological data
    Progress in Photovoltaics: Research and Applications, 1999
    Co-Authors: K Yoshioka, S. Goma, K. Kurokawa, T. Saitoh
    Abstract:

    A three-dimensional, rectangular concentrator lens (3D lens) has been designed by combining two kinds of two-dimensional compound elliptic lenses and meteorological data. Optical concentration ratios of the 3D lenses designed at various half-acceptance angles are calculated and measured as a function of light incidence angle. Yearly integrated irradiance and yearly averaged Module efficiency are simulated using the calculated optical concentration ratios and meteorological data. A performance index - a product of entry aperture and cell occupation ratios - is defined to compare with that of Flat-Plate Modules. Consequently, designed half-acceptance angles are optimized at 40° and 70° in north-south and east-west directions. The occupation area of solar cells can be reduced to 62% using this lens although Module area increases to only 1.16 times that of the Flat-Plate Module.

  • Fabrication and properties of a glass-lens, static-concentrator mini-Module
    Conference Record of the Twenty Sixth IEEE Photovoltaic Specialists Conference - 1997, 1997
    Co-Authors: K Yoshioka, Takashi Nikaido, T. Saitoh, M. Kanai, I. Hide
    Abstract:

    A glass-lens, static-concentrator mini-Module was fabricated by attaching a co-molded glass-lens on a conventional superstrate Flat-Plate Module. Its properties were investigated under simulated and real sunlight conditions. The effect of rear reflection on optical concentration was investigated for the static concentrator mini-Modules with white, black and transparent rear Tedlar films. Under a solar simulator condition, optical concentration ratios of 2.05, 1.75 and 1.70 were obtained for the white, transparent and black films. From outdoor and also indoor measurements, the mini-Module with the white Tedlar showed the highest maximum output power throughout daytime.

Tadashi Saitoh - One of the best experts on this subject based on the ideXlab platform.

  • Performance Improvement of Light-Trapping Type Concentrator Modules for Circular Cells
    Solar Energy, 2003
    Co-Authors: Kenji Koizumi, Kazuya Yoshioka, Tadashi Saitoh
    Abstract:

    A Flat-type concentrator for circular solar cells has been proposed to improve the performance for a conventional Flat-Plate Module with perfectly circular and semi-square Cz silicon cells. Fundamental optical properties of various V-grooves for concentrator Modules with circular cells are calculated using a ray-tracing method to optimize the shape of V-groove. Based on these results, yearly-integrated irradiance ratios of the concentrator to a conventional Flat-Plate Module are calculated using meteorological data. By the use of a reflection material with a reflectivity of 94%, yearly-integrated irradiance ratio of an optimized light-trapping type concentrator (LTC) Module with circular cells attains to 1.18. Suppose that the LTC Module and a conventional Module gain the same amount of irradiance, the area of solar cells in the PV Module can be reduced to 84.7% compared with the conventional Flat-Plate Module. A LTC Module with semi-square solar cells is designed and simulated for Module fabrication. Yearly-integrated irradiance ratio attains to 1.25 using a reflectivity of 80%. The area of solar cells in a PV Module can be reduced to 80% compared with a conventional Flat-Plate Module.© 2003 ASME

  • Performance improvement of a static concentrator Module with an asymmetric v-groove backsheet structure
    Solar Energy Materials and Solar Cells, 2003
    Co-Authors: Kenji Koizumi, K Yoshioka, K Sugita, Tadashi Saitoh
    Abstract:

    A light-trapping type concentrator Module with a new asymmetric V-groove structure at the rear surface is proposed to improve the performance of static concentrator Module. Fundamental optical properties of various asymmetric V-grooves are calculated using a ray-tracing method. Based on these results, yearly integrated irradiance ratios of the concentrator Module to a conventional Flat-Plate Module are calculated using meteorological data. By the use of Ag as a reflection material, yearly integrated irradiance ratio of concentrator Module with an asymmetric V-groove is 1.34, and the occupation area of Si cells in a Module can be reduced to 74% compared with a conventional Flat-Plate Module.

T. Saitoh - One of the best experts on this subject based on the ideXlab platform.

  • Improved design of a three‐dimensional, static concentrator lens using meteorological data
    Progress in Photovoltaics: Research and Applications, 1999
    Co-Authors: K Yoshioka, S. Goma, K. Kurokawa, T. Saitoh
    Abstract:

    A three-dimensional, rectangular concentrator lens (3D lens) has been designed by combining two kinds of two-dimensional compound elliptic lenses and meteorological data. Optical concentration ratios of the 3D lenses designed at various half-acceptance angles are calculated and measured as a function of light incidence angle. Yearly integrated irradiance and yearly averaged Module efficiency are simulated using the calculated optical concentration ratios and meteorological data. A performance index - a product of entry aperture and cell occupation ratios - is defined to compare with that of Flat-Plate Modules. Consequently, designed half-acceptance angles are optimized at 40° and 70° in north-south and east-west directions. The occupation area of solar cells can be reduced to 62% using this lens although Module area increases to only 1.16 times that of the Flat-Plate Module.

  • Fabrication and properties of a glass-lens, static-concentrator mini-Module
    Conference Record of the Twenty Sixth IEEE Photovoltaic Specialists Conference - 1997, 1997
    Co-Authors: K Yoshioka, Takashi Nikaido, T. Saitoh, M. Kanai, I. Hide
    Abstract:

    A glass-lens, static-concentrator mini-Module was fabricated by attaching a co-molded glass-lens on a conventional superstrate Flat-Plate Module. Its properties were investigated under simulated and real sunlight conditions. The effect of rear reflection on optical concentration was investigated for the static concentrator mini-Modules with white, black and transparent rear Tedlar films. Under a solar simulator condition, optical concentration ratios of 2.05, 1.75 and 1.70 were obtained for the white, transparent and black films. From outdoor and also indoor measurements, the mini-Module with the white Tedlar showed the highest maximum output power throughout daytime.

Zhang Shu - One of the best experts on this subject based on the ideXlab platform.

  • 335-W World-Record p-Type Monocrystalline Module With 20.6% Efficient PERC Solar Cells
    IEEE Journal of Photovoltaics, 2016
    Co-Authors: Zhang Shu, Weiwei Deng, Xiujuan Pan, Haijun Jiao, Xu Jianmei, Yifeng Chen, Pietro P. Altermatt, Zhiqiang Feng, Pierre J. Verlinden
    Abstract:

    The objective of this study is to optimize Module technologies to obtain the lowest price per Watt peak ($/Wp) ratio and the maximum power output of a Flat-Plate Module for a given number of high-efficiency solar cells. Using B-doped p-type monocrystalline Cz silicon wafers, 500 pieces of full square $ 156\;\text{mm} \times 156\;\text{mm}$ solar cells with a passivated emitter and rear local contacts (PERC) were fabricated with an average efficiency of 20.6% by in-house measurement. The Module includes half-cells for low interconnection losses, as well as a novel light-trapping scheme including light capture ribbon connected to the cells and a structured light reflective film between cells combined with an optimized large cell gap. The Module using 60 pieces of the 20.6% efficient PERC solar cells has achieved a new world record, with a peak power output of 335.2 ${\rm W_{p}}$ in September 2014, demonstrating a large cell-to-Module factor, which is defined as $P_{{\rm mmp}}$ of Module divided by the sum of cell $P_{{\rm mmp}}$ . The CTM factor of the champion Module is greater than 1.11.

  • 335Watt world record P-type mono-crystalline Module with 20.6 % efficiency PERC solar cells
    2015 IEEE 42nd Photovoltaic Specialist Conference (PVSC), 2015
    Co-Authors: Zhang Shu, Weiwei Deng, Xiujuan Pan, Haijun Jiao, Daming Chen, Huang Hongwei, Yanfeng Cui, Xu Jianmei, Jun Feng, Ming Zhong
    Abstract:

    The objective of this experiment was to optimize Module technologies to obtain the lowest price per Watt peak ($/Wp) ratio and the maximum power output of a Flat-Plate Module for a given number of high efficiency solar cells. Using p-type mono-crystalline Cz square silicon wafers, 156 mm × 156 mm solar cells with a passivated emitter and rear local contacts (PERC cells) were fabricated with an average efficiency of 20.6 %. The Module includes half-cells for low interconnection losses, as well as a novel light-trapping scheme including Light Capture Ribbon (LCR) and a structured Light Reflective Film (LRF) between cells combined with an optimized large cell gap. The Module achieves a new world record with a peak power output of 335.2 W in Sep. 2014, demonstrating that a large Cell-to-Module (CTM) factor, in this case greater than 1.11, can be achieved with new light trapping and low resistance connection technologies.