Search Results - "Johnson, Erik V"

Strong ionization asymmetry in a geometrically symmetric radio frequency capacitively coupled plasma induced by sawtooth voltage waveforms by Bruneau, Bastien, Gans, Timo, O'Connell, Deborah, Greb, Arthur, Johnson, Erik V, Booth, Jean-Paul

“…The ionization dynamics in geometrically symmetric parallel plate capacitively coupled plasmas driven by radio frequency tailored voltage waveforms is…”
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Irreversible light-induced degradation and stabilization of hydrogenated polymorphous silicon solar cells by Kim, Ka-Hyun, Johnson, Erik V., Roca i Cabarrocas, Pere

“…In this work, hydrogenated amorphous and polymorphous silicon (a-Si:H and pm-Si:H) solar cells were tested for the reversibility of their light-induced…”
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Evolution of Cu-In Catalyst Nanoparticles under Hydrogen Plasma Treatment and Silicon Nanowire Growth Conditions by Wang, Weixi, Ngo, Éric, Bulkin, Pavel, Zhang, Zhengyu, Foldyna, Martin, Roca I Cabarrocas, Pere, Johnson, Erik V, Maurice, Jean-Luc

“…We report silicon nanowire (SiNW) growth with a novel Cu-In bimetallic catalyst using a plasma-enhanced chemical vapor deposition (PECVD) method. We study the…”
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Effect of Ion Energy on Microcrystalline Silicon Material and Devices: A Study Using Tailored Voltage Waveforms by Bruneau, Bastien, Lepecq, Michael, Junkang Wang, Dornstetter, Jean-Christophe, Maurice, Jean-Luc, Johnson, Erik V.

“…The use of tailored voltage waveforms to excite a plasma has been shown to be an effective technique to decouple maximum ion energy from the ion flux on the…”
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Ion Energy Threshold in Low-Temperature Silicon Epitaxy for Thin-Film Crystalline Photovoltaics by Bruneau, Bastien, Cariou, Romain, Dornstetter, Jean-Christophe, Lepecq, Michael, Maurice, Jean-Luc, Roca i Cabarrocas, Pere, Johnson, Erik V.

“…Plasma-enhanced chemical vapor deposition (PECVD) enables epitaxial silicon deposition for up to several micrometers and at low temperatures (as low as 150…”
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Microcrystalline silicon thin film deposition from silicon tetrafluoride: Isolating role of ion energy using tailored voltage waveform plasmas by Wang, Junkang, Daineka, Dmitri, Elyaakoubi, Mustapha, Johnson, Erik V.

“…The energy of ions during plasma enhanced chemical vapor deposition (PECVD) is known to impact material quality, but isolating this effect from other process…”
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Tailored Voltage Waveform Deposition of Microcrystalline Silicon Thin Films from Hydrogen-Diluted Silane and Silicon Tetrafluoride: Optoelectronic Properties of Films by Johnson, Erik V, Pouliquen, Sylvain, Delattre, Pierre-Alexandre, Booth, Jean-Paul

“…The use of tailored voltage waveforms (TVW's) to excite a plasma for the deposition of thin films of hydrogenated microcrystalline silicon (μc-Si:H) has been…”
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Plasma nanotexturing of silicon surfaces for photovoltaics applications: influence of initial surface finish on the evolution of topographical and optical properties by Fischer, Guillaume, Drahi, Etienne, Foldyna, Martin, Germer, Thomas A, Johnson, Erik V

“…Using a plasma to generate a surface texture with feature sizes on the order of tens to hundreds of nanometers ("nanotexturing") is a promising technique being…”
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Challenges in advanced characterization techniques for high Voc thin-film tandem solar cells by Ventosinos, Federico, Fakes, Boulos, Johnson, Erik V.

“…In this work we focus on two techniques developed to extract the individual open circuit voltages (Voc) of tandem devices, as well as their sub‐cell…”
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Ultrathin Ge epilayers on Si produced by low-temperature PECVD acting as virtual substrates for III-V / c-Si tandem solar cells by Ghosh, Monalisa, Bulkin, Pavel, Silva, François, Johnson, Erik V., Florea, Ileana, Funes-Hernando, Daniel, Tanguy, Alexandre, Renard, Charles, Vaissiere, Nicolas, Decobert, Jean, García, Iván, Rey-Stolle, Ignacio, Roca i Cabarrocas, Pere

“…Ultrathin (20 nm) epitaxial films of germanium are deposited on crystalline silicon wafers, to act as virtual substrates for the growth of III-V materials,…”
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Large Area Radial Junction Silicon Nanowire Solar Mini-Modules by Al-Ghzaiwat, Mutaz, Foldyna, Martin, Fuyuki, Takashi, Chen, Wanghua, Johnson, Erik V., Meot, Jacques, Roca i Cabarrocas, Pere

“…In this work, we introduce the demonstration of 5 × 5 cm 2 mini-modules based on radial junction silicon nanowire (RJ SiNW) devices grown by plasma-assisted…”
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Triple Radial Junction Hydrogenated Amorphous Silicon Solar Cells with >2 V Open‐Circuit Voltage by Wang, Chaoqi, Foldyna, Martin, Johnson, Erik V., Roca i Cabarrocas, Pere

“…When solar cells are used as the photoanode for direct water splitting, the output voltage required typically exceeds that of a single‐junction photovoltaic…”
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Plasma-Assisted Growth of Silicon Nanowires by Sn Catalyst: Step-by-Step Observation by Tang, Jian, Maurice, Jean-Luc, Chen, Wanghua, Misra, Soumyadeep, Foldyna, Martin, Johnson, Erik V., Roca i Cabarrocas, Pere

“…A comprehensive study of the silicon nanowire growth process has been carried out. Silicon nanowires were grown by plasma-assisted-vapor-solid method using tin…”
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Current-induced and light-induced macroscopic changes in thin film solar cells: Device degradation mechanism by Kim, Ka-Hyun, Johnson, Erik V., Roca i Cabarrocas, Pere

“…Schematic diagram of experimental setup and crosssection structure of solar cells (left) and optical images of a-Si:H and pm-Si:H PIN layer stacks at various…”
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Unravelling a simple method for the low temperature synthesis of silicon nanocrystals and monolithic nanocrystalline thin films by Kim, Ka-Hyun, Johnson, Erik V., Kazanskii, Andrey G., Khenkin, Mark V., Roca i Cabarrocas, Pere

“…In this work, we present new results on the plasma processing and structure of hydrogenated polymorphous silicon (pm-Si:H) thin films. pm-Si:H thin films…”
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Quasi-fivefold symmetric electron diffraction patterns due to multiple twinning in silicon thin films grown from hexamethyldisiloxane by Haddad, Farah, Goyal, Prabal, Johnson, Erik V., Hong, Junegie, Roca i Cabarrocas, Pere, Maurice, Jean-Luc

“…Unusual quasi‐fivefold symmetric electron diffraction patterns are observed for silicon thin films grown by plasma‐enhanced chemical vapour deposition and…”
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Substrate versus superstrate configuration for stable thin film silicon solar cells by Kim, Ka-Hyun, Kasouit, Samir, Johnson, Erik V., Roca i Cabarrocas, Pere

“…We report on the light-induced degradation kinetics of hydrogenated polymorphous silicon (pm-Si:H) solar cells having either substrate or superstrate device…”
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Light-induced changes in silicon nanocrystal based solar cells: Modification of silicon-hydrogen bonding on silicon nanocrystal surface under illumination by Kim, Ka-Hyun, Johnson, Erik V., Roca i Cabarrocas, Pere

“…Hydrogenated polymorphous silicon (pm-Si:H) is a material consisting of a small volume fraction of nanocrystals embedded in an amorphous matrix. pm-Si:H solar…”
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Spectral response and field enhanced reverse current in a-Ge:H nip photodiodes by Johnson, Erik V., Roca i Cabarrocas, Pere

“…We demonstrate the effectiveness of using a high Ar+H 2 dilution of GeH 4, high pressure, and low substrate temperatures in producing device-grade a-Ge:H…”
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Tailored Voltage Waveform Deposition of Microcrystalline Silicon Thin Films from Hydrogen-Diluted Silane and Silicon Tetrafluoride: Optoelectronic Properties of Films by Johnson, Erik V., Pouliquen, Sylvain, Delattre, Pierre-Alexandre, Booth, Jean-Paul

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