The Experts below are selected from a list of 10917 Experts worldwide ranked by ideXlab platform

Hiroshi Yabuno - One of the best experts on this subject based on the ideXlab platform.

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

  • B1300 Journal of The Electrochemical Society, 158 (11) B1300-B1305 (2011) 0013-4651/2011/158(11)/B1300/6/$28.00 © The Electrochemical Society Light-Induced Plating of Screen-Printed Multi-CrystalLine Silicon Solar Cells
    2016
    Co-Authors: Feng Gao, K R Mikeska, M E Lewittes, Paul D. Vernooy, Lap Kin Cheng
    Abstract:

    Light-induced plating (LIP) has been used to evaluate solar cells screen-printed on 28 mm × 28 mm multi-crystalLine Si (mc-Si) wafers from experimental silver thick-film pastes A and B. Cells were fabricated from paste A using screens with 60, 80, and 100 μm wide Line openings. After firing at optimal temperature and measuring electrical performance, the cells were plated using the LIP process. Cell fill factor and efficiency increased noticeably while cell series resistance decreased. The observed efficiency increase ranged from 0.4 % to 1.0 % and was due to improved contact resistivity and decreased Conductor Line resistance. The mechanism for improved performance was elucidated through conductivity measurements and microstructural investigation using advanced scanning electron microscopy. Surface morphology of the silver Conductor Line obtained from the LIP process is reported. Cells from paste B were printed with a 100 μm wide opening screen. The efficiency of cells printed with paste B using the 100 μm screen followed by the LIP process did not show an efficiency improvement. It is shown that an optimally designed, state-of-the-art paste (paste B) can deliver sufficiently low series resistance and achieve high cell efficiency without using the LIP process. © 2011 The Electrochemical Society. [DOI: 10.1149/2.021111jes] All rights reserved. Manuscript submitted May 24, 2011; revised manuscript received August 1, 2011. Published October 5, 2011. Increasing solar cell efficiency is an ongoing process in the solar cell industry. Screen printing, although a century-old technology, is used broadly for commercial solar cell manufacturing becaus

  • microstructural comparison of silicon solar cells front side ag contact and the evolution of current conduction mechanisms
    Journal of Applied Physics, 2011
    Co-Authors: L Liang, Lap Kin Cheng, A S Ionkin, B M Fish, M E Lewittes, K R Mikeska
    Abstract:

    Microstructures of front-side Ag contact of crystalLine Si solar cells fired at temperatures from below to above optimal were systematically investigated using advanced electron microscopy. Ag pastes studied included commercial pastes and an experimental paste containing nano-sized metallic Zn additive. Microstructures of optimally fired cells determined from cross-sectional and top-view images were found to be consistent with a primary tunneling mechanism for current flow (a “nano-Ag colloids assisted tunneling” model) due to the lack of Ag crystallites connecting the silver Conductor Line to the silicon emitter. We mapped the evolution of the interfacial microstructures across the firing temperature window and correlated it with cell performance. Our result sheds light on the relative importance of the two current transport models as the peak firing temperature was swept from below to above optimal.

Lap Kin Cheng - One of the best experts on this subject based on the ideXlab platform.

  • B1300 Journal of The Electrochemical Society, 158 (11) B1300-B1305 (2011) 0013-4651/2011/158(11)/B1300/6/$28.00 © The Electrochemical Society Light-Induced Plating of Screen-Printed Multi-CrystalLine Silicon Solar Cells
    2016
    Co-Authors: Feng Gao, K R Mikeska, M E Lewittes, Paul D. Vernooy, Lap Kin Cheng
    Abstract:

    Light-induced plating (LIP) has been used to evaluate solar cells screen-printed on 28 mm × 28 mm multi-crystalLine Si (mc-Si) wafers from experimental silver thick-film pastes A and B. Cells were fabricated from paste A using screens with 60, 80, and 100 μm wide Line openings. After firing at optimal temperature and measuring electrical performance, the cells were plated using the LIP process. Cell fill factor and efficiency increased noticeably while cell series resistance decreased. The observed efficiency increase ranged from 0.4 % to 1.0 % and was due to improved contact resistivity and decreased Conductor Line resistance. The mechanism for improved performance was elucidated through conductivity measurements and microstructural investigation using advanced scanning electron microscopy. Surface morphology of the silver Conductor Line obtained from the LIP process is reported. Cells from paste B were printed with a 100 μm wide opening screen. The efficiency of cells printed with paste B using the 100 μm screen followed by the LIP process did not show an efficiency improvement. It is shown that an optimally designed, state-of-the-art paste (paste B) can deliver sufficiently low series resistance and achieve high cell efficiency without using the LIP process. © 2011 The Electrochemical Society. [DOI: 10.1149/2.021111jes] All rights reserved. Manuscript submitted May 24, 2011; revised manuscript received August 1, 2011. Published October 5, 2011. Increasing solar cell efficiency is an ongoing process in the solar cell industry. Screen printing, although a century-old technology, is used broadly for commercial solar cell manufacturing becaus

  • microstructural comparison of silicon solar cells front side ag contact and the evolution of current conduction mechanisms
    Journal of Applied Physics, 2011
    Co-Authors: L Liang, Lap Kin Cheng, A S Ionkin, B M Fish, M E Lewittes, K R Mikeska
    Abstract:

    Microstructures of front-side Ag contact of crystalLine Si solar cells fired at temperatures from below to above optimal were systematically investigated using advanced electron microscopy. Ag pastes studied included commercial pastes and an experimental paste containing nano-sized metallic Zn additive. Microstructures of optimally fired cells determined from cross-sectional and top-view images were found to be consistent with a primary tunneling mechanism for current flow (a “nano-Ag colloids assisted tunneling” model) due to the lack of Ag crystallites connecting the silver Conductor Line to the silicon emitter. We mapped the evolution of the interfacial microstructures across the firing temperature window and correlated it with cell performance. Our result sheds light on the relative importance of the two current transport models as the peak firing temperature was swept from below to above optimal.

Kiyotaka Yamashita - One of the best experts on this subject based on the ideXlab platform.

M E Lewittes - One of the best experts on this subject based on the ideXlab platform.

  • B1300 Journal of The Electrochemical Society, 158 (11) B1300-B1305 (2011) 0013-4651/2011/158(11)/B1300/6/$28.00 © The Electrochemical Society Light-Induced Plating of Screen-Printed Multi-CrystalLine Silicon Solar Cells
    2016
    Co-Authors: Feng Gao, K R Mikeska, M E Lewittes, Paul D. Vernooy, Lap Kin Cheng
    Abstract:

    Light-induced plating (LIP) has been used to evaluate solar cells screen-printed on 28 mm × 28 mm multi-crystalLine Si (mc-Si) wafers from experimental silver thick-film pastes A and B. Cells were fabricated from paste A using screens with 60, 80, and 100 μm wide Line openings. After firing at optimal temperature and measuring electrical performance, the cells were plated using the LIP process. Cell fill factor and efficiency increased noticeably while cell series resistance decreased. The observed efficiency increase ranged from 0.4 % to 1.0 % and was due to improved contact resistivity and decreased Conductor Line resistance. The mechanism for improved performance was elucidated through conductivity measurements and microstructural investigation using advanced scanning electron microscopy. Surface morphology of the silver Conductor Line obtained from the LIP process is reported. Cells from paste B were printed with a 100 μm wide opening screen. The efficiency of cells printed with paste B using the 100 μm screen followed by the LIP process did not show an efficiency improvement. It is shown that an optimally designed, state-of-the-art paste (paste B) can deliver sufficiently low series resistance and achieve high cell efficiency without using the LIP process. © 2011 The Electrochemical Society. [DOI: 10.1149/2.021111jes] All rights reserved. Manuscript submitted May 24, 2011; revised manuscript received August 1, 2011. Published October 5, 2011. Increasing solar cell efficiency is an ongoing process in the solar cell industry. Screen printing, although a century-old technology, is used broadly for commercial solar cell manufacturing becaus

  • microstructural comparison of silicon solar cells front side ag contact and the evolution of current conduction mechanisms
    Journal of Applied Physics, 2011
    Co-Authors: L Liang, Lap Kin Cheng, A S Ionkin, B M Fish, M E Lewittes, K R Mikeska
    Abstract:

    Microstructures of front-side Ag contact of crystalLine Si solar cells fired at temperatures from below to above optimal were systematically investigated using advanced electron microscopy. Ag pastes studied included commercial pastes and an experimental paste containing nano-sized metallic Zn additive. Microstructures of optimally fired cells determined from cross-sectional and top-view images were found to be consistent with a primary tunneling mechanism for current flow (a “nano-Ag colloids assisted tunneling” model) due to the lack of Ag crystallites connecting the silver Conductor Line to the silicon emitter. We mapped the evolution of the interfacial microstructures across the firing temperature window and correlated it with cell performance. Our result sheds light on the relative importance of the two current transport models as the peak firing temperature was swept from below to above optimal.