Search Results - "Mitchell, Bernhard"

Growth of Oxygen Precipitates and Dislocations in Czochralski Silicon by Rougieux, Fiacre E., Nguyen, Hieu T., Macdonald, D. H., Mitchell, Bernhard, Falster, Robert

“…The impact of oxygen precipitates and dislocations on carrier recombination is investigated on thick silicon slabs cut vertically from a Czochralski-grown…”
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Analyzing Rapid-QE Data Using Rayflare by Wong, Johnson, Mitchell, Bernhard, Wagner-Mohnsen, Hannes, Pearce, Phoebe

“…1000 Topcon cells external quantum efficiency (EQE) curves are obtained at 27 representative LED wavelengths spanning from 350-1200nm. These curves are fitted…”
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Quantifying the effect of minority carrier diffusion and free carrier absorption on photoluminescence bulk lifetime imaging of silicon bricks by Mitchell, Bernhard, Greulich, Johannes, Trupke, Thorsten

“…The spatially resolved bulk lifetimes of silicon bricks can be obtained by spectral photoluminescence intensity ratio imaging. The underlying principle of this…”
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Photoluminescence Imaging Using Silicon Line-Scanning Cameras by Mitchell, Bernhard, Chung, Daniel, Teal, Anthony

“…We experimentally demonstrate photoluminescence imaging using a silicon line-scanning camera. The narrow rectangular geometry of the sensor effectively lowers…”
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Four-junction spectral beam-splitting photovoltaic receiver with high optical efficiency by Mitchell, Bernhard, Peharz, Gerhard, Siefer, Gerald, Peters, Marius, Gandy, Tobias, Goldschmidt, Jan Christoph, Benick, Jan, Glunz, Stefan W., Bett, Andreas W., Dimroth, Frank

“…A spectral beam‐splitting architecture is shown to provide an excellent basis for a four junction photovoltaic receiver with a virtually ideal band gap…”
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The Impact of Silicon CCD Photon Spread on Quantitative Analyses of Luminescence Images by Walter, Daniel, Fell, Andreas, Franklin, Evan, Macdonald, Daniel, Mitchell, Bernhard, Trupke, Thorsten

“…Commercial and R&D photoluminescence imaging systems commonly employ indirect bandgap silicon charge-coupled device (CCD) imaging sensors. Silicon is a weak…”
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Lifetime Imaging on Silicon Bricks Using the Ratio of Photoluminescence Images With Different Excitation Wavelengths by Chung, Daniel, Mitchell, Bernhard, Juhl, Mattias K., Abbott, Malcolm, Trupke, Thorsten

“…The efficiency of silicon solar cells is eventually limited by the bulk lifetime of minority carriers in the wafer. The characterization of the bulk quality,…”
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Uncertainty in Photoluminescence Metrology on Multicrystalline Silicon Bricks and Cross Validation With Wafers by Chung, Daniel, Mitchell, Bernhard, Goodarzi, Mohsen, Sinton, Ronald A., Macdonald, Daniel, Trupke, Thorsten

“…Bulk lifetime and interstitial iron concentration are two pertinent parameters describing the quality of multicrystalline silicon, which can be measured on…”
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High-performance p-type multicrystalline silicon (mc-Si): Its characterization and projected performance in PERC solar cells by Altermatt, Pietro P., Xiong, Zhen, He, QiuXiang, Deng, WeiWei, Ye, Feng, Yang, Yang, Chen, Yifeng, Feng, ZhiQiang, Verlinden, Pierre J., Liu, Anyao, Macdonald, Daniel H., Luka, Tabea, Lausch, Dominik, Turek, Marko, Hagendorf, Christian, Wagner-Mohnsen, Hannes, Schön, Jonas, Kwapil, Wolfram, Frühauf, Felix, Breitenstein, Otwin, Looney, Erin E., Buonassisi, Tonio, Needleman, David B., Jackson, Christine M., Arehart, Aaron R., Ringel, Steven A., McIntosh, Keith R., Abbott, Malcolm D., Sudbury, Ben A., Zuschlag, Annika, Winter, Clemens, Skorka, Daniel, Hahn, Giso, Chung, Daniel, Mitchell, Bernhard, Geelan-Small, Peter, Trupke, Thorsten

“…•High-performance p-type mc-Si material is characterized by 13 research groups.•Highest (lowest) lifetime regions limited by interstitial iron (Cu…”
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PERC Solar Cell Performance Predictions From Multicrystalline Silicon Ingot Metrology Data by Mitchell, Bernhard, Chung, Daniel, Qiuxiang He, Hua Zhang, Zhen Xiong, Altermatt, Pietro P., Geelan-Small, Peter, Trupke, Thorsten

“…The influence of the as-grown material quality on the performance of multicrystalline silicon PERC solar cells is investigated using recently developed…”
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Bulk Lifetimes up to 20 ms Measured on Unpassivated Silicon Discs Using Photoluminescence Imaging by Chung, Daniel, Mitchell, Bernhard, Goodarzi, Mohsen, Sun, Chang, Macdonald, Daniel, Trupke, Thorsten

“…With high-efficiency silicon solar cells approaching 25% efficiency in mass production, the requirements on the bulk lifetime and its uniformity across the…”
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Combining Numerical Simulations, Machine Learning and Genetic Algorithms for Optimizing a POCl3 Diffusion Process by Wagner-Mohnsen, Hannes, Esefelder, Sascha, Kloter, Bernhard, Mitchell, Bernhard, Schinke, Carsten, Bredemeier, Dennis, Jager, Philip, Brendel, Rolf

“…Advanced mathematical methods, like machine learning or genetic algorithms, have the potential to further accelerate the computer-aided optimization of…”
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Correlation study of doped layer mid-IR properties to the end-of-line parameters of bifacial PERC solar cells by Ananthanarayanan, Divya, Wong, Johnson, Zheng, Xin, Mitchell, Bernhard, Esefelder, Sascha, Mette, Britta, Choi, Kwan Bum, Ho, Jian Wei

“…Rapid and non-contact doped layer characterization using mid-IR reflectance and transmittance measurement is a proven inline monitoring approach commercially…”
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Spatially Resolved Absorptance of Silicon Wafers From Photoluminescence Imaging by Juhl, Mattias Klaus, Trupke, Thorsten, Abbott, Malcolm, Mitchell, Bernhard

“…The absorptance of a silicon solar cell determines the upper limit of its short-circuit current and, thus, its efficiency. Traditional methods used to…”
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Development of Inline Solar Cell Metrology Using Contacted and Contactless Quantum Efficiency by Wong, Johnson, Mitchell, Bernhard, Esefelder, Sascha, Mette, Britta, Tjahjono, Budi, Choi, Kwan Bum, Clarence Heng, Min Xuan, Chuah, Tuang Heok, Ho, Jian Wei

“…Four batches of 500 production solar cells are evaluated using I-V at 1-Sun, and using both contacted and contactless quantum efficiency techniques. The two…”
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A comparison between quasi-steady state and transient photoconductance lifetimes in silicon ingots: simulations and measurements by Goodarzi, Mohsen, Sinton, Ronald, Chung, Daniel, Mitchell, Bernhard, Trupke, Thorsten, Macdonald, Daniel

“…We present and compare numerical simulations and experimental data for Quasi-Steady State (QSS) and transient photoconductance lifetime measurements on silicon…”
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Imaging As-Grown Interstitial Iron Concentration on Boron-Doped Silicon Bricks via Spectral Photoluminescence by Mitchell, Bernhard, Macdonald, Daniel, Schon, Jonas, Weber, Jurgen W., Wagner, Hannes, Trupke, Thorsten

“…The interstitial iron concentration measured directly on the side face of a silicon brick after crystallization and brick squaring can give important early and…”
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Full Spectrum Photoluminescence Lifetime Analyses on Silicon Bricks by Mitchell, B., Juhl, M. K., Green, M. A., Trupke, T.

“…Bulk lifetime and doping images on silicon bricks can be obtained by spectral luminescence intensity ratio analysis as established recently. Here, we report on…”
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PERC Solar Cell Performance Predictions from Multicrystalline Silicon Ingot Metrology Data by Mitchell, Bernhard, Chung, Daniel, He, Qiuxiang, Zhang, Hua, Xiong, Zhen, Altermatt, Pietro P., Geelan-Small, Peter, Trupke, Thorsten

“…The influence of the as-grown material quality on the performance of multicrystalline silicon PERC solar cells is investigated using recently developed…”
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Contrast enhancement of luminescence images via point-spread deconvolution by Walter, D., Anyao Liu, Franklin, E., Macdonald, D., Mitchell, B., Trupke, T.

“…We investigate the impact of point-spread in the silicon CCD sensor of a BT Imaging LIS-R1 luminescence imaging system. It is found that an experimental…”
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