Search Results - "Weigand, William"

Understanding what limits the voltage of polycrystalline CdSeTe solar cells by Onno, Arthur, Reich, Carey, Li, Siming, Danielson, Adam, Weigand, William, Bothwell, Alexandra, Grover, Sachit, Bailey, Jeff, Xiong, Gang, Kuciauskas, Darius, Sampath, Walajabad, Holman, Zachary C.

“…The origin of voltage deficits in polycrystalline cadmium selenide telluride (CdSeTe) solar cells is unclear. Here, we present a comprehensive voltage loss…”
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Current-Matched III–V/Si Epitaxial Tandem Solar Cells with 25.0% Efficiency by Fan, Shizhao, Yu, Zhengshan J., Hool, Ryan D., Dhingra, Pankul, Weigand, William, Kim, Mijung, Ratta, Erik D., Li, Brian D., Sun, Yukun, Holman, Zachary C., Lee, Minjoo L.

“…III–V/Si epitaxial tandems with a 1.7-eV GaAsP top cell promise stable power conversion efficiencies above the fundamental limit of Si single-junction cells…”
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High-Throughput In-Line Deposition of Silicon Oxide Passivation Layers in Silicon TOPCon Solar Cells by Leuty, Zachary B., Weigand, William J., Ochoa, Jorge, Carpenter, Joe V., Bertoni, Mariana I., Holman, Zachary C.

“…The ultra-thin silicon oxide layer in poly-Si passivated contacts plays a vital role in reducing recombination at the c-Si/oxide interface. We replaced this…”
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Monitoring GFP-operon fusion protein expression during high cell density cultivation of Escherichia coli using an on-line optical sensor by DeLisa, Matthew P., Li, Jincai, Rao, Govind, Weigand, William A., Bentley, William E.

“…Synthesis of an operon fusion protein was investigated in batch and fed‐batch cultures at high cell densities of recombinant Escherichia coli JM105…”
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Triple-halide wide-band gap perovskites with suppressed phase segregation for efficient tandems by Xu, Jixian, Boyd, Caleb C, Yu, Zhengshan J, Palmstrom, Axel F, Witter, Daniel J, Larson, Bryon W, France, Ryan M, Werner, Jérémie, Harvey, Steven P, Wolf, Eli J, Weigand, William, Manzoor, Salman, van Hest, Maikel F A M, Berry, Joseph J, Luther, Joseph M, Holman, Zachary C, McGehee, Michael D

“…Wide-band gap metal halide perovskites are promising semiconductors to pair with silicon in tandem solar cells to pursue the goal of achieving power conversion…”
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Silicon Thin-Film Contacts to Crystalline Silicon Solar Cells by Weigand, William

“…The application of silicon thin films in solar cells has evolved from their use in amorphous silicon solar cells to their use as passivating and…”
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Sub-micrometer random-pyramid texturing of silicon solar wafers with excellent surface passivation and low reflectance by Alasfour, Abdulwahab, Yu, Zhengshan J., Weigand, William, Quispe, David, Holman, Zachary C.

“…Select emerging solar cell technologies, ranging from very narrow screen-printed fingers to perovskite/silicon tandems, would benefit from a reduction of the…”
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Framework for online optimization of recombinant protein expression in high-cell-density Escherichia coli cultures using GFP-fusion monitoring by Chae, Hee Jeong, Delisa, Matthew P., Cha, Hyung Joon, Weigand, William A., Rao, Govind, Bentley, William E.

“…A framework for the online optimization of protein induction using green fluorescent protein (GFP)‐monitoring technology was developed for high‐cell‐density…”
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20%-efficient epitaxial GaAsP/Si tandem solar cells by Fan, Shizhao, Yu, Zhengshan J., Sun, Yukun, Weigand, William, Dhingra, Pankul, Kim, Mijung, Hool, Ryan D., Ratta, Erik D., Holman, Zachary C., Lee, Minjoo L.

“…We present epitaxial 1.7 eV/1.1 eV GaAs0.75P0.25/Si tandem cells with an NREL-certified efficiency of 20.0%, enabled by a thermally stable tunnel junction…”
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Sub-micrometer random-pyramid texturing of silicon solar wafers with excellent surface passivation and low reflectance by Alasfour, Abdulwahab, Yu, Zhengshan J., Weigand, William, Quispe, David, Holman, Zachary C.

“…Select emerging solar cell technologies, ranging from very narrow screen-printed fingers to perovskite/silicon tandems, would benefit from a reduction of the…”
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Sub-micrometer random-pyramid texturing of silicon solar wafers with excellent surface passivation and low reflectance by Alasfour, Abdulwahab, Yu, Zhengshan J., Weigand, William, Quispe, David, Holman, Zachary C.

“…Select emerging solar cell technologies, ranging from very narrow screen-printed fingers to perovskite/silicon tandems, would benefit from a reduction of the…”
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Complete regeneration of BO-related defects in n-type upgraded metallurgical-grade Czochralski-grown silicon heterojunction solar cells by Sun, Chang, Chen, Daniel, Weigand, William, Basnet, Rabin, Phang, Sieu Pheng, Hallam, Brett, Holman, Zachary C., Macdonald, Daniel

“…Complete regeneration of boron-oxygen-related (BO) defects has been demonstrated on n-type upgraded metallurgical-grade (UMG) Czochralski-grown silicon…”
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Contact Resistivity of the p-Type Amorphous Silicon Hole Contact in Silicon Heterojunction Solar Cells by Leilaeioun, Mehdi, Weigand, William, Boccard, Mathieu, Yu, Zhengshan J., Fisher, Kathryn, Holman, Zachary C.

“…In silicon heterojunction solar cells made with high-lifetime wafers, resistive losses in the contacts dominate the total electrical power loss. Moreover, it…”
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Amorphous silicon carbide high contrast gratings as highly efficient spectrally selective visible reflectors by Bauser, Haley C., Foley, Morgan D., Phelan, Megan E., Weigand, William, Needell, David R., Holman, Zachary C., Atwater, Harry A.

“…We report spectrally selective visible wavelength reflectors using hydrogenated amorphous silicon carbide (a-SiC:H) as a high index contrast material. Beyond…”
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Progress with Defect Engineering in Silicon Heterojunction Solar Cells by Wright, Matthew, Stefani, Bruno Vicari, Soeriyadi, Anastasia, Basnet, Rabin, Sun, Chang, Weigand, William, Yu, Zhengshan, Holman, Zachary, Macdonald, Daniel, Hallam, Brett

“…Due to the low temperature processing constraint in silicon heterojunction (SHJ) solar cells, no defect engineering to improve silicon wafer quality is…”
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Origins of hydrogen that passivates bulk defects in silicon heterojunction solar cells by Sun, Chang, Weigand, William, Shi, Jianwei, Yu, Zhengshan, Basnet, Rabin, Phang, Sieu Pheng, Holman, Zachary C., Macdonald, Daniel

“…Silicon heterojunction solar cell fabrication incorporates a significant amount of hydrogen into the silicon wafer bulk, and the amount of injected hydrogen is…”
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Impact of pre-fabrication treatments on n-type UMG wafers for 21% efficient silicon heterojunction solar cells by Basnet, Rabin, Weigand, William, Yu, Zhengshan J., Sun, Chang, Phang, Sieu P., Sio, Hang C., Rougieux, Fiacre E., Holman, Zachary C., Macdonald, Daniel

“…Silicon heterojunction solar cells achieve high conversion efficiency due to the excellent surface passivation provided by the hydrogenated intrinsic amorphous…”
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P‐type Upgraded Metallurgical‐Grade Multicrystalline Silicon Heterojunction Solar Cells with Open‐Circuit Voltages over 690 mV by Vicari Stefani, Bruno, Weigand, William, Wright, Matthew, Soeriyadi, Anastasia, Yu, Zhengshan (Jason), Kim, Moonyong, Chen, Daniel, Holman, Zachary, Hallam, Brett

“…Herein, low‐cost p‐type upgraded metallurgical‐grade (UMG) multicrystalline silicon wafers are processed from the edge of the silicon cast using a multi‐stage…”
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20%-Efficient TOPCon Solar Cell with a Silicon Oxide Layer Deposited by Aerosol Impaction-Driven Assembly by Garcia, Maria Angelica M, Weigand, William, Holman, Zachary C

“…Tunnel oxide passivated contacts (TOPCon) have become an increasingly popular contact choice for use in silicon solar cells due to their carrier-selective…”
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Photonic Crystal Waveguides for >90% Light Trapping Efficiency in Luminescent Solar Concentrators by Bauser, Haley C, Bukowsky, Colton R, Phelan, Megan, Weigand, William, Needell, David R, Holman, Zachary C, Atwater, Harry A

“…Luminescent solar concentrators are currently limited in their potential concentration factor and solar conversion efficiency by the inherent escape cone…”
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