Skip to main content

21 Result(s)

within D. E. Carlson Remove this filter

previous disabled Page of 2
and

  1. No Access

    Article

    Temperature Dependence of a Hydrogen Doublet Site in Light-Soaked a-Si:H From 1H NMR

    We investigate the temperature dependence of an additional 1H NMR signal that appears in aSi:H at T = 7 K only after light soaking. This “doublet” signal is attributed to a pair of hydrogen atoms approximately 2....

    T. Su, P. C. Taylor, G. Ganguly, D. E. Carlson in MRS Online Proceedings Library (2011)

  2. No Access

    Article

    1H NMR Evidence for a Change in the Local Hydrogen Environment of Sites Associated with the Staebler-Wronski Effect in a-Si:H

    We study the H NMR line shapes of a sample of a-Si:H under several conditions: 1) as grown, 2) light-soaked for 600 hours, and 3) light-soaked followed by annealing at different temperatures. At T = 7 K, the NMR ...

    T. Su, Robin Plachy, P. C. Taylor, S. Stone, G. Ganguly… in MRS Online Proceedings Library (2011)

  3. No Access

    Article

    Effect of Temperature and Temperature Uniformity on Plasma and Device Stability

    We have investigated the changes in the cathode potential in a dc discharge of silane and hydrogen used to deposit the intrinsic layer of p-i-n type solar cells at deposition rates from 1 to 10Å/s with the sup...

    G. Ganguly, M. S. Bennett, D. E. Carlson, R. R. Arya in MRS Online Proceedings Library (2011)

  4. No Access

    Article

    Room Temperature Recovery of Light Induced Changes in Amorphous Silicon Solar Cells

    We have observed the recovery of the performance of amorphous silicon (a-Si:H) based solar cell (especially the fill factor) at temperatures between 25°C and 170°C after ∼600 hours of light soaking under 1 sun...

    G. Ganguly, D. E. Carlson, M. S. Bennett, F. Willing… in MRS Online Proceedings Library (2011)

  5. No Access

    Article

    Absence of a Steady State in Hydrogen Diluted Silane Plasmas Due to Mass Dependent Gas Pum** Speeds and Its Consequences

    We have investigated the cause for continued changes in the silane related species observed using mass spectroscopy during i-layer deposition process lasting several tens of minutes. Silane decomposition is fo...

    G. Ganguly, G. Wood, J. N. Newton, M. Bennett… in MRS Online Proceedings Library (2011)

  6. No Access

    Article

    Technology transfer challenges in the manufacturing of a-Si tandem solar cells

    BP Solar started commercial production of amorphous silicon tandem solar cells in Toano, Virginia in 1997. The scale-up process has involved overcoming technology challenges in several areas. It was necessary ...

    D. E. Carlson, G. Ganguly, G. Lin, M. Gleaton, M. Bennett… in MRS Online Proceedings Library (2000)

  7. No Access

    Article

    A Comparison of the Degradation and Annealing Kinetics in Amorphous Silicon and Amorphous Silicon-Germaniumsolar Cells

    The degradation and annealing kinetics of both a-Si:H and a-SiGe:H single-junction solar cells were investigated under varying conditions. In every case, the kinetics associated with degradation and annealing ...

    D. E. Carlson, L. F. Chen, G. Ganguly, G. Lin… in MRS Online Proceedings Library (1999)

  8. No Access

    Article

    He-Dilution to Increase Deposition Rate and Feedstock Utilization During the Growth of a-Si:H and a-SiGe:H Alloys

    We report on the development of helium diluted a-Si:H and a-SiGe:H solar cells with higher deposition rates and better feedstock utilization than devices made with hydrogen dilution. Both the initial and the s...

    A. R. Middya, G. Wood, G. H. Lin, D. E. Carlson in MRS Online Proceedings Library (1999)

  9. No Access

    Article

    Advances in amorphous silicon photovoltaic technology

    With the advent of new multijunction thin film solar cells, amorphous silicon photovoltaic technology is undergoing a commercial revival with about 30 megawatts of annual capacity coming on-line in the next ye...

    D. E. Carlson, K. Rajan, R. R. Arya, F. Willing, L. Yang in Journal of Materials Research (1998)

  10. No Access

    Article

    Environmental Applications of Xanes: Speciation of Tc In Cement After Chemical Treatment and Se After Bacterial Uptake

    XANES (X-ray Absorption Near Edge Spectroscopy) has been employed to evaluate the efficacy of a process designed to encapsulate and reduce TcO4- in cement matrices, thereby immobilizing Tc. The oxidation state of...

    D. K. Shuh, N. Kaltsoyannis, J. J. Bucher… in MRS Online Proceedings Library (1994)

  11. No Access

    Chapter

    Hydrogen Motion and the Staebler-Wronski Effect in Amorphous Silicon

    In 1977 Staebler and Wronski (1) discovered that prolonged illumination could induce reversible changes in the photoconductivity and dark conductivity of hydrogenated amorphous silicon (a-Si: H). Subsequently,...

    D. E. Carlson in Disordered Semiconductors (1987)

  12. No Access

    Article

    Hydrogenated microvoids and light-induced degradation of amorphous-silicon solar cells

    Amorphous-silicon solar cells generally exhibit a degradation of conversion efficiency in the first few weeks of exposure to sun light. This degradation is associated with metastable defect centers that influe...

    D. E. Carlson in Applied Physics A (1986)

  13. No Access

    Article

    Impurities and Metastable Centers in Amorphous Silicon Solar Cells

    Amorphous silicon solar cells are adversely affected by impurities through the creation of traps, recombination centers and metastable centers. The microstructure of discharged-produced, hydrogenated amorphous...

    D. E. Carlson in MRS Online Proceedings Library (1986)

  14. No Access

    Chapter

    Amorphous silicon solar cells

    D. E. Carlson, C. R. Wronski in Amorphous Semiconductors (1985)

  15. No Access

    Article

    An investigation of microcrystalline films produced by a dc glow discharge in silane and hydrogen

    Microcrystalline and amorphous Si:H films have been produced in a dc cathodic discharge in atmospheres containing silane diluted in hydrogen. The composition of the discharge atmosphere has a strong effect on ...

    D. E. Carlson, R. W. Smith in Journal of Electronic Materials (1982)

  16. No Access

    Book and Conference Proceedings

    Proceedings of the IUTAM Symposium on Finite Elasticity

    Held at Lehigh University, Bethlehem, PA, USA August 10–15, 1980

    D. E. Carlson, R. T. Shield (1982)

  17. No Access

    Article

    The ferredoxin/thioredoxin system of enzyme regulation in a cyanobacterium

    Cell-free preparations of the cyanobacterium (bluegreen alga) Nostoc muscorum were assayed for thioredoxins and enzymes catalyzing the ferredoxin and NADP-linked reduction of thioredoxin. Nostoc was found to have...

    B. C. Yee, A. de la Torre, N. A. Crawford, C. Lara… in Archives of Microbiology (1981)

  18. No Access

    Chapter and Conference Paper

    The Status of Amorphous Silicon Solar Cells

    The performance of amorphous silicon solar cells has improved significantly in the last several months. Conversion efficiencies as high as 6.1% have been reported by RCA Laboratories in p-i-n cells (area = 1.1...

    D. E. Carlson in Photovoltaic Solar Energy Conference (1981)

  19. No Access

    Article

    Tumor immunity directed against MOPC 104E: Effect of various therapeutic regimens

    Animals bearing the passable plasmacytoma MOPC 104E could be cured of palpable tumors (0.6–2.0×108 cells) with single 10–250 mg/kg doses of cyclophosphamide or single localized x-ray doses greater than 1600 R. Re...

    R. A. Lubet, D. E. Carlson in Cancer Immunology, Immunotherapy (1977)

  20. No Access

    Article

    Solar cells using discharge-produced amorphous silicon

    Thin film solar cells, ≲ 1 μm thick, have been fabricated in p-i-n and Schottky barrier structures using d.c. and r.f. glow discharges in silane. Conversion efficiencies in the range of 2.5 to 4.0% have been o...

    D. E. Carlson, C. R. Wronski in Journal of Electronic Materials (1977)

previous disabled Page of 2