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Energy

Alternative energy

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Displaying 626 - 650 of 706

First-principles Study of Defect Migration in RE-doped Ceria (RE = Pr, Gd)

February 2, 2011
Author(s)
Pratik Dholabhai, James B. Adams, Peter A. Crozier, Renu Sharma
Oxygen vacancy formation and migration in ceria (CeO2) is central to its performance as an ionic conductor. Ceria doped with suitable aliovalent dopants has enhanced oxygen ion conductivity - higher than that of yttria stabilized zirconia (YSZ), the most

Equations of State on Demand: Application for Surrogate Fuel Development

January 15, 2011
Author(s)
Marcia L. Huber, Thomas J. Bruno, Robert D. Chirico, Vladimir Diky, Andrei F. Kazakov, Eric W. Lemmon, Chris D. Muzny, Michael D. Frenkel
The NIST ThermoData Engine (TDE) is a large electronic database containing experimental data with detailed descriptions of relevant metadata and uncertainties that incorporates expert- system software to automatically generate dynamically evaluated data

Influence of substrate on crystallization in polythiophene/fullerene blends

January 13, 2011
Author(s)
Lee J. Richter, Christine He, David Germack, R Joseph Kline, Dean DeLongchamp, Daniel A. Fischer, Chad R. Snyder, James G. Kushmerick
The nanoscale morphology of the active layer in organic, bulk heterojunction (BHJ) solar cells is crucial to device performance. Often a combination of casting conditions and post deposition thermal treatment are used to optimize the morphology. In general

WATER TRANSPORT ACROSS A POLYMER ELECTROLYTE MEMBRANE UNDER THERMAL GRADIENTS

January 11, 2011
Author(s)
David L. Jacobson, Richard Fu, Takeshi Shiomi, Ugur Pasaogullari, Joshua Preston, Shinichi Miyazaki, Yuichiro Tabuchi, Daniel S. Hussey
A fundamental experimental and numerical study of the water transport across a perfluorosulfonic acid (PFSA) membrane under a temperature gradient is presented. The water transport phenomenon was experimentally investigated through water flux measurement

Efficiency Enhancement of Copper Contaminated Radial p-n Junction Solar Cells

January 7, 2011
Author(s)
Akram Boukai, Paul M. Haney, Aaron Katzenmeyer, Gregg M. Gallatin, Albert A. Talin, Peidong Yang
A significant fraction of the cost of a planar p-n junction silicon solar cell stems from the silicon purification process.1 Eliminating the purification step would decrease the cost, yet also decrease the solar cell efficiency significantly. Here, we have

Application of Microwave Scanning Probes to Photovoltaic Materials

June 20, 2010
Author(s)
Kristine A. Bertness, John B. Schlager, Norman A. Sanford, Atif A. Imtiaz, Thomas M. Wallis, Joel C. Weber, Pavel Kabos, Lorelle M. Mansfield
We demonstrate that near field scanning microwave microscopy (NSMM) can be used to detect photoresponse in photovoltaic materials with potential for submicrometer resolution. In this approach, a radio-frequency scanning tunneling microscopy (RF-STM) tip is
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