Search Results - "Lumb, Matthew"

Visualizing localized, radiative defects in GaAs solar cells by Hamadani, Behrang H., Stevens, Margaret A., Conrad, Brianna, Lumb, Matthew P., Schmieder, Kenneth J.

“…We have used a calibrated, wide-field hyperspectral imaging instrument to obtain absolute spectrally and spatially resolved photoluminescence images in high…”
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Enhanced Open-Circuit Voltage of PbS Nanocrystal Quantum Dot Solar Cells by Yoon, Woojun, Boercker, Janice E., Lumb, Matthew P., Placencia, Diogenes, Foos, Edward E., Tischler, Joseph G.

“…Nanocrystal quantum dots (QD) show great promise toward improving solar cell efficiencies through the use of quantum confinement to tune absorbance across the…”
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Enhanced Multiple Exciton Generation in Quasi-One-Dimensional Semiconductors by Cunningham, Paul D, Boercker, Janice E, Foos, Edward E, Lumb, Matthew P, Smith, Anthony R, Tischler, Joseph G, Melinger, Joseph S

“…The creation of a single electron–hole pair (i.e., exciton) per incident photon is a fundamental limitation for current optoelectronic devices including…”
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Effect of occupation of the excited states and phonon broadening on the determination of the hot carrier temperature from continuous wave photoluminescence in InGaAsP quantum well absorbers by Esmaielpour, Hamidreza, Whiteside, Vincent R., Hirst, Louise C., Tischler, Joseph G., Ellis, Chase T., Lumb, Matthew P., Forbes, David V., Walters, Robert J., Sellers, Ian R.

“…An InGaAsP quantum well with a type‐II band alignment is studied using continuous wave power and temperature dependent photoluminescence (PL) spectroscopy. The…”
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GaSb‐Based Solar Cells for Full Solar Spectrum Energy Harvesting by Lumb, Matthew P., Mack, Shawn, Schmieder, Kenneth J., González, María, Bennett, Mitchell F., Scheiman, David, Meitl, Matthew, Fisher, Brent, Burroughs, Scott, Lee, Kyu‐Tae, Rogers, John A., Walters, Robert J.

“…In this work, a multijunction solar cell is developed on a GaSb substrate that can efficiently convert the long‐wavelength photons typically lost in a…”
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InP-Based Tunnel Junctions for Microconcentrator Photovoltaics by Schmieder, Kenneth J., Mood, Thomas C., Armour, Eric A., Bennett, Mitchell F., Stevens, Margaret A., Diaz, Martin, Pulwin, Ziggy, Lumb, Matthew P.

“…To further improve the performance of mechanically stacked microconcentrator photovoltaic devices, we have studied high-transparency tunnel junctions for…”
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Design and demonstration of ultra-compact microcell concentrating photovoltaics for space by Ruud, Christian J., Grede, Alex J., Chang, Jan-Kai, Lumb, Matthew P., Schmieder, Kenneth J., Fisher, Brent, Rogers, John A., Gordon, Jeffrey M., Giebink, Noel C.

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What Limits the Voltage of GaAs Photovoltaic Devices under Low Indoor Light? by Hamadani, Behrang H., Stevens, Margaret A., Lumb, Matthew P., Schmieder, Kenneth J.

“…The external radiative efficiency of a photovoltaic device is a useful metric to compare different photovoltaic technologies and material systems. However,…”
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Effect of Growth Temperature on GaAs Solar Cells at High MOCVD Growth Rates by Schmieder, Kenneth J., Armour, Eric A., Lumb, Matthew P., Yakes, Michael K., Pulwin, Ziggy, Frantz, Jesse, Walters, Robert J.

“…Increasing epitaxial growth rate is an important path toward III-V solar cell cost reductions; however, photovoltaic device performance has been shown to…”
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Modeling and analysis of high-performance, multicolored anti-reflection coatings for solar cells by Lumb, Matthew P, Yoon, Woojun, Bailey, Christopher G, Scheiman, David, Tischler, Joseph G, Walters, Robert J

“…In this work solar cell anti-reflection coatings tuned to give a specific hue under solar illumination are investigated. We demonstrate that it is possible to…”
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Hyperspectral Imaging of Localized, Optically-Active Defects in GaAs Solar Cells by Hamadani, Behrang H., Stevens, Margaret A., Conrad, Brianna, Lumb, Matthew P., Armour, Eric, Schmieder, Kenneth J.

“…A novel hyperspectral imaging instrument with dual electroluminescence and photoluminescence capability was used to image and analyze localized radiative…”
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Assessing epitaxial regrowth material quality on a micro-transfer printed GaAs substrate by Schmieder, Kenneth J., Lumb, Matthew P., Bennett, Mitchell F., Haughn, Chelsea R., Mack, Shawn, Yakes, Michael K., Maximenko, Sergey I., Walters, Robert J.

“…•Epitaxial regrowth accomplished on a membrane that was removed from its native substrate.•Power-dependent photoluminescence shows comparable recombination…”
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InP-Based Tunnel Junctions for Micro-Concentrator Photovoltaics by Schmieder, Kenneth J, Mood, Thomas C, Armour, Eric A, Bennett, Mitchell F, Stevens, Margaret A, Diaz, Martin, Pulwin, Ziggy, Lumb, Matthew P

“…To further improve the performance of mechanically stacked micro-concentrator photovoltaic devices, we have studied tunnel junctions for inclusion in triple…”
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Enhanced Hot-Carrier Effects in InAlAs/InGaAs Quantum Wells by Hirst, Louise C., Yakes, Michael K., Bailey, Christopher G., Tischler, Joseph G., Lumb, Matthew P., Gonzalez, Maria, Fuhrer, Markus F., Ekins-Daukes, N. J., Walters, Robert J.

“…Hot-carrier solar cells require absorber materials with restricted carrier thermalization pathways, in order to slow the rate of heat energy dissipation from…”
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Sintered CdTe Nanocrystal Thin Films: Determination of Optical Constants and Application in Novel Inverted Heterojunction Solar Cells by Woojun Yoon, Townsend, Troy K., Lumb, Matthew P., Tischler, Joseph G., Foos, Edward E.

“…In this paper, we report a novel heterojunction solar cell based on sintered CdTe and CdSe nanocrystal thin films using solution-based deposition. For the…”
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Inorganic Photovoltaic Devices Fabricated Using Nanocrystal Spray Deposition by Foos, Edward E., Yoon, Woojun, Lumb, Matthew P., Tischler, Joseph G., Townsend, Troy K.

“…Soluble inorganic nanocrystals offer a potential route to the fabrication of all-inorganic devices using solution deposition techniques. Spray processing…”
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High temperature current–voltage characteristics of InP‐based tunnel junctions by Lumb, Matthew P., González, María, Yakes, Michael K., Affouda, Chaffra A., Bailey, Christopher G., Walters, Robert J.

“…In this paper, we present temperature‐dependent current–voltage measurements of tunnel junctions lattice matched to InP at temperatures ranging from room…”
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Photovoltaics on Transfer Printed III-V Virtual Substrates by Schmieder, Kenneth J., Lumb, Matthew P., Bennett, Mitchell F., Tomasulo, Stephanie, Yakes, Michael K., Mack, Shawn, Moore, James E., Walters, Robert J.

“…We demonstrate a novel concept for III-V engineered substrate cost reduction that does not rely on chemical-mechanical polishing or low-throughput release…”
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Modeling of Partial Shading Tolerance in Micro Concentrator Photovoltaic Modules by Moore, James E., Schmieder, Kenneth J., Wagner, Wolfgang, Lumb, Matthew P.

“…Micro-concentrator photovoltaics (μ-CPV) may provide a cost effective means of producing terrestrial solar power with high area efficiency. By printing CPV…”
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High Growth Rate Rear-Junction GaAs Solar Cell with a Distributed Bragg Reflector by Stevens, Margaret A., Lumb, Matthew P., Armour, Eric A., Bennett, Mitchell F., Pulwin, Ziggy, Frantz, Jesse A., Myers, Jason, Walters, Robert J., Schmieder, Kenneth J.

“…Fast epitaxial growth is an attractive method for reducing III-V photovoltaic device cost. Here, we grow a high-performance, rear-junction GaAs solar cell at 1…”
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