Resource Type
Collection
Serial/Series Title
Country
200 Matching Results
Results open in a new window/tab.
Inverted GaInP/GaAs/InGaAs Triple-Junction Solar Cells with Low-Stress Metamorphic Bottom Junctions
None
Date:
May 1, 2008
Creator:
Geisz, J. F.; Kurtz, S. R.; Wanlass, M. W.; Ward, J. S.; Duda, A.; Friedman, D. J. et al.
System:
The UNT Digital Library
Lattice-Mismatched GaAsP Solar Cells Grown on Silicon by OMVPE
None
Date:
May 1, 2006
Creator:
Geisz, J. F.; Olson, J. M.; Romero, M. J.; Jiang, C S. & Norman, A G.
System:
The UNT Digital Library
Material Resource Considerations for Ex Situ Carbon Sequestration
The conclusions of this report are: (1) There are enough ultramafic resources to sequester all the CO{sub 2} produced by coal-fired powerplants in the US; (2) Sequestering all the CO{sub 2} would require a significant increase in the mining of ultramafic minerals; (3) The increased mining will have an environmental cost; (4) Some man made by product minerals could contribute to CO{sub 2} sequestration although many of these resources are small; and (5) It may be possible in some cases to sequester CO{sub 2} and eliminate hazardous waste in the same ex situ process.
Date:
May 1, 2005
Creator:
Gerdemann, Stephen J.; Dahlin, David C.; O'Connor, William K.; Penner, Larry R. & Rush, Gilbert E.
System:
The UNT Digital Library
Formation of ZnTe:Cu/Ti Contacts at High Temperature for CdS/CdTe Devices
The conclusions of this report are that Cu diffusion from a ZnTe:Cu contact causes good and bad things. The good (Cu in CdS < low 10{sup 18} cm{sup -3})--increase in CdTe N{sub A}-N{sub D} that leads to V{sub oc} and FF improvement. The bad (Cu in CdS > low 10{sup 18} cm{sup -3})--(1) possibly decreased of shunt resistance (?); (2) depletion width in CdTe can become too narrow for optimum current collection at J{sub MPP}; (3) donor reduction in CdS (significant FF loss in LIV); and (4) excessive Cu diffusion into CdS readily observed by red-light bias QE.
Date:
May 1, 2006
Creator:
Gessert, T. A.; Asher, S.; Johnston, S.; Duda, A.; Young, M. R. & Moriarty, T.
System:
The UNT Digital Library
Effects of Cu Diffusion From ZnTe:Cu/Ti Contacts on Carrier Lifetime of CdS/CdTe Thin Film Solar Cells
None
Date:
May 1, 2008
Creator:
Gessert, T. A.; Metzger, W. K.; Asher, S. E.; Young, M. R.; Johnston, S.; Dhere, R. G. et al.
System:
The UNT Digital Library
Renewable Energy and Inter-Island Power Transmission
This presentation summarizes recent findings pertaining to inter-island connection of renewable and other energy sources, in particular, as these findings relate cable options, routing, specifications, and pros and cons.
Date:
May 1, 2011
Creator:
Gevorgian, V.
System:
The UNT Digital Library
Biological Systems for Hydrogen Photoproduction
This presentation summarizes NREL biological systems for hydrogen photoproduction work for the DOE Hydrogen and Fuel Cells Program Annual Merit Review and Peer Evaluation Meeting, May 14-18, 2012. General goal is develop photobiological systems for large-scale, low cost and efficient H{sub 2} production from water (barriers AH, AI and AJ). Specific tasks are: (1) Address the O{sub 2} sensitivity of hydrogenases that prevent continuity of H{sub 2} photoproduction under aerobic, high solar-to-hydrogen (STH) light conversion efficiency conditions; and (2) Utilize a limited STH H{sub 2}-producing method (sulfur deprivation) as a platform to address or test other factors limiting commercial algal H{sub 2} photoproduction, including low rates due to biochemical and engineering mechanisms.
Date:
May 1, 2012
Creator:
Ghirardi, M. L.
System:
The UNT Digital Library
Biological Systems for Hydrogen Photoproduction
None
Date:
May 16, 2007
Creator:
Ghirardi, M. L.
System:
The UNT Digital Library
Biological Systems for Hydrogen Photoproduction
Presentation on Biological Systems for Hydrogen Photoproduction for the 2005 Hydrogen, Fuel Cells & Infrastructure Technologies Program Annual Review held in Arlington, Virginia, May 23-26, 2005.
Date:
May 1, 2005
Creator:
Ghirardi, M. L.; Kim, K.; King, P.; Maness, P. C. & Seibert, M.
System:
The UNT Digital Library
Energy Security: Microgrid Planning and Design
Energy Security: Microgrid Planning and Design presentation to be given at the 2012 WREF in Denver, CO.
Date:
May 1, 2012
Creator:
Giraldez, J.
System:
The UNT Digital Library
Road to Net Zero (Presentation)
A PowerPoint presentation on NREL's Research Support Facility (RSF) and the road to achieving net zero energy for new construction.
Date:
May 1, 2011
Creator:
Glover, B.
System:
The UNT Digital Library
Performance Boundaries in Nb3Sn Superconductors
None
Date:
May 1, 2006
Creator:
Godeke, Arno
System:
The UNT Digital Library
Update on Titanium Drip Shield
None
Date:
May 8, 2006
Creator:
Gordon, G.M.; Mon, K. & Hua, F.
System:
The UNT Digital Library
Purdue Hydrogen Technology Program
Presented at the 2006 DOE Hydrogen, Fuel Cells & Infrastructure Technologies Program Annual Merit Review in Washington, D.C., May 16-19, 2006.
Date:
May 1, 2006
Creator:
Gore, J.; Ramachandran, P. V.; Zheng, Y.; Kramer, R.; Varma, A.; Fisher, T. et al.
System:
The UNT Digital Library
Purdue Hydrogen Systems Laboratory
None
Date:
May 1, 2007
Creator:
Gore, J.; Ramachandran, P.; Gagare, P.; Varma, A.; Shafirovich, E.; Diakov, V. et al.
System:
The UNT Digital Library
Transparent Conducting Contacts Based on Zinc Oxide Substitutionally Doped with Gallium
None
Date:
May 1, 2008
Creator:
Gorrie, C. W.; Reese, M.; Perkins, J. D.; Alleman, J. L.; S., Dabney M.; To, B. et al.
System:
The UNT Digital Library
Novel Tertiary Amine Solid Adsorbents Used for the Capture of Carbon Dioxide
None
Date:
May 1, 2006
Creator:
Gray, M. L.; Fauth, D. J.; Champagne, Kenneth; Beckman, Eric & Tarka, Thomas
System:
The UNT Digital Library
Do the Defects Make it Work? Defect Engineering in π - Conjugated Polymer Films and Their Solar Cells
The summaries of this report are: (1) charged defects produce 10{sup 15}-10{sup 17} cm{sup -3} free carriers; (2) treatment with nucleophiles decreases p{sub f} and {sigma} while treatment with electrophiles does not change p{sub f} but increases {sigma}; (3) both treatments increase {mu}{sub p}, L{sub ex} and stability against photo-degradation; (4) charged defects can improve OPV by increasing conductivity and creating interfacial electric fields but they hurt {mu}{sub p}, L{sub ex} and chemical stability; and (5) a better way--synthesize materials without covalent defects and dope with purposely added, bound dopants.
Date:
May 1, 2008
Creator:
Gregg, B. A.; Wang, D.; Reese, M. O. & Kopidakis, N.
System:
The UNT Digital Library
2016 Paid Leave Analysis Grants: Prospective Applicant Webinar
This presentation is a webinar to discuss eligibility, application and submission requirements, evaluation criteria, and Review and Selection Process for the paid leave analysis grants.
Date:
May 12, 2016
Creator:
Gupta, Pronita & Watson, Laura
System:
The UNT Digital Library
Research Opportunities in Reliability of Photovoltaic Modules
The motivation for an increased scope and a more proactive effort in reliability research of photovoltaic modules and systems includes reducing the levelized cost of energy and gaining better confidence in the energy and financial payback for photovoltaic systems. This increased reliability and confidence will lead to greater penetration of photovoltaics in the energy portfolio and greater employment in photovoltaics and related industries. Present research needs include the fundamental degradation mechanisms of polymers, connectors and other module components, mapping of failure mechanisms observed in the field to those in accelerated lifetime tests, determining the acceleration factors, and improving standards for modules such that tests can appropriately be assigned to evaluate their long term durability. Specific mechanisms discussed are corrosion in module components, metastability in thin-film active layers, delamination and loss of elastic properties in module polymeric materials, and inverter failure. Presently, there is hiring of reliability scientists and engineers at many levels of the value chain for photovoltaics.
Date:
May 1, 2010
Creator:
Hacke, P.
System:
The UNT Digital Library
Initial Results of IEC 62804 Draft Round Robin Testing
This presentation discusses the Initial round robin results of the IEC 62804 system voltage durability qualification test for crystalline silicon modules.
Date:
May 1, 2013
Creator:
Hacke, P.; Terwilliger, K.; Koch, S.; Weber, T.; Berghold, J.; Hoffmann, S. et al.
System:
The UNT Digital Library
Renewable Electrolysis Integrated System Development and Testing
None
Date:
May 15, 2007
Creator:
Harrison, K.
System:
The UNT Digital Library
Hydrogen Production: Fundamentals and Case Study Summaries
This presentation summarizes hydrogen production fundamentals and case studies, including hydrogen to wind case studies.
Date:
May 19, 2010
Creator:
Harrison, K.; Remick, R.; Hoskin, A. & Martin, G.
System:
The UNT Digital Library
Ethanol Production, Distribution, and Use: Discussions on Key Issues
From production to the environment, presentation discusses issues surrounding ethanol as a transportation fuel.
Date:
May 14, 2008
Creator:
Harrow, G.
System:
The UNT Digital Library