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5 results on '"Franz, Amy"'

1. Tunable SrTiO3 varactors using parallel plate and interdigital structures

Author

Mueller, Carl H., Treece, Randolph E., Rivkin, Tania V., Miranda, Felix A., Moutinho, Helio R., Swartzlander-Franz, Amy, Dalberth, Mark, and Rogers, Charles T.

Subjects
Dielectric films -- Research, Varactors -- Research, Business, Electronics, Electronics and electrical industries
Abstract

Dielectric SrTiO3/YBCO and SrTiO3 films deposited on LaAlO3 substrates are proposed for varactor applications with capacitances subjected to a direct current voltage applied across the films. The films exhibited an optimal growth temperature of 800-degrees celsius. Results prove that lower losses and higher tunabilities may be achieved using interdigital varactors made up of STO films directly deposited on LaAlO3 substrates.

Published
1997

2. Long-term variation in concentrations and mass loads in a semi-arid watershed influenced by historic mercury mining and urban pollutant sources

Author

McKee, Lester J., primary, Bonnema, Autumn, additional, David, Nicole, additional, Davis, Jay A., additional, Franz, Amy, additional, Grace, Richard, additional, Greenfield, Ben K., additional, Gilbreath, Alicia N., additional, Grosso, Cristina, additional, Heim, Wesley A., additional, Hunt, Jennifer A., additional, Leatherbarrow, Jon E., additional, Lowe, Sarah, additional, Pearce, Sarah A., additional, Ross, John R.M., additional, and Yee, Donald, additional

Published
2017
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3. High efficiency Cu(In,Ga)Se2-based solar cells: Processing of novel absorber structures

Author

Contreras, Miguel A., Tuttle, John, Gabor, Andrew, Tennant, Andrew, Ramanathan, Kannan, Asher, Sally, Franz, Amy, Keane, James, Wang, L., Scofield, John, and Noufi, Rommel

Abstract

Our effort towards the attainment of high performance devices has yielded several devices wi{h total-area conversion efficiencies above 16%, the highest measuring 16.8% under standard reporting conditions (ASTM E892-87, Global 1000 W/m2). The first attempts to translate this development to larger areas resulted in an efficiency of 12.5% for a 16.8-cm 2 monolithically interconnected submodule test structure, and 15.3% for a 4.85-cm 2 single cell. Achievement of a 17.2% device efficiency fabricated for operation under concentration (22-sun) is also reported. All high efficiency devices reported here are made from graded bandgap absorbers. Bandgap grading is achieved by compositional GaJ(In+Ga) profiling as a function of depth. The fabrication schemes to achieve the graded absorbers, the window materials and contacting will be described.

Published
2002

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