Search Results - "Shafarman, W.N."

Effect of Rapid Thermal Processing on the structural and device properties of (Ag,Cu)(In,Ga)Se2 thin film solar cells by Simchi, H., McCandless, B.E., Kim, K., Boyle, J.H., Shafarman, W.N.

“…(AgwCu1−w)(In1−xGax)Se2 alloy absorber layers with w≈0.8 and x≈0.78 ratios were deposited using multi-source elemental evaporation and analyzed by glancing…”
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pin double-heterojunction thin-film solar cell p-layer assessment by Spies, J.A., Schafer, R., Wager, J.F., Hersh, P., Platt, H.A.S., Keszler, D.A., Schneider, G., Kykyneshi, R., Tate, J., Liu, X., Compaan, A.D., Shafarman, W.N.

“…The simplest realization of a pin double-heterojunction thin-film solar cell would consist of a lightly doped, moderate-bandgap absorber i-layer; a heavily…”
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First quadrant phototransistor behavior in CuInSe2 photovoltaics by Rockett, A., van Duren, J.K.J., Pudov, A., Shafarman, W.N.

“…Temperature-dependent current voltage measurements on a CuInSe2 (CIS) solar cell are described and analyzed in detail. At relatively low temperatures, the…”
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Distinguishing metastable changes in bulk CIGS defect densities from interface effects by Heath, J.T., Cohen, J.D., Shafarman, W.N.

“…The deep defect distributions affecting majority carrier trapping in polycrystalline CuIn 1− x Ga x Se 2 (CIGS) have been studied using drive level capacitance…”
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Structural, optical, and surface properties of WO3 thin films for solar cells by Simchi, H., McCandless, B.E., Meng, T., Shafarman, W.N.

“…•WO3 films were deposited by RF reactive sputtering, and annealed in different temperatures.•As deposited films were amorphous while >400°C annealed films were…”
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Losses in CuInSe/sub 2/-based thin film monolithic tandem solar cells by Shafarman, W.N., Paulson, P.D.

“…Two critical aspects for the development of tandem solar cells using CuInSe/sub 2/-alloy materials are addressed. First a structure for monolithic tandem solar…”
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Thin-film solar cells: device measurements and analysis by Hegedus, Steven S., Shafarman, William N.

“…Characterization of amorphous Si, CdTe, and Cu(InGa)Se2‐based thin‐film solar cells is described with focus on the deviations in device behavior from standard…”
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The growth by the hybrid sputtering and evaporation method and microstructural studies of CuInSe2 films by YANG, L.-C, XIAO, H. Z, ROCKETT, A, SHAFARMAN, W. N, BIRKMIRE, R. W

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Structural characterization of the (AgCu)(InGa)Se 2 thin film alloy system for solar cells by Boyle, J.H., McCandless, B.E., Hanket, G.M., Shafarman, W.N.

“…A detailed structural analysis of the (AgCu)(InGa)Se 2 thin film alloy system was undertaken via X-ray diffraction in order to determine its phase behavior and…”
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Structural characterization of the (AgCu)(InGa)Se2 thin film alloy system for solar cells by BOYLE, J. H, MCCANDLESS, B. E, HANKET, G. M, SHAFARMAN, W. N

“…A detailed structural analysis of the (AgCu)(InGa)Se2 thin film alloy system was undertaken via X-ray diffraction in order to determine its phase behavior and…”
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High efficiency CIGS and CIS cells with CVD ZnO buffer layers by Olsen, L.C., Wenhua Lei, Addis, F.W., Shafarman, W.N., Contreras, M.A., Ramanathan, K.

“…This paper describes investigations of CIS and CIGS solar cells with ZnO buffer layers. These studies are a result of a team effort between investigators at…”
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New Cd-free buffer layer deposited by PVD: In2S3 containing Na compounds by Barreau, N., Bernède, J.C., Marsillac, S., Amory, C., Shafarman, W.N.

“…In2S3 containing sodium (BINS) thin films can be grown on glass substrates heated at 200 C. The films have a n-type electrical conductivity and their optical…”
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Surface sulfurization studies of Cu(InGa)Se2 thin film by SINGH, Udai P, SHAFARMAN, William N, BIRKMIRE, Robert W

“…Sulfurization of copper indium gallium diselenide (CIGS) thin films solar cell absorber has been used to enhance the open-circuit voltage of the device by…”
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Soft X-rays shedding light on thin-film solar cell surfaces and interfaces by Bär, M., Pookpanratana, S., Weinhardt, L., Wilks, R.G., Schubert, B.A., Marsen, B., Unold, T., Blum, M., Krause, S., Zhang, Y., Ranasinghe, A., Ramanathan, K., Repins, I., Contreras, M.A., Nishiwaki, S., Liu, X., Paudel, N.R., Fuchs, O., Niesen, T.P., Yang, W., Karg, F., Compaan, A.D., Shafarman, W.N., Noufi, R., Schock, H.-W., Heske, C.

“…► S/Se gradient-driven chemical interaction at the CdS/CIG(S)Se interface. ► Depth-dependent band gap in chalcopyrites. ► Band alignment at the CdS/Cu2ZnSnS4…”
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Comparison of device performance and measured transport parameters in widely-varying Cu(In,Ga) (Se,S) solar cells by Repins, I. L., Stanbery, B. J., Young, D. L., Li, S. S., Metzger, W. K., Perkins, C. L., Shafarman, W. N., Beck, M. E., Chen, L., Kapur, V. K., Tarrant, D., Gonzalez, M. D., Jensen, D. G., Anderson, T. J., Wang, X., Kerr, L. L., Keyes, B., Asher, S., Delahoy, A., Von Roedern, B.

“…We report the results of an extensive study employing numerous methods to characterize carrier transport within copper indium gallium sulfoselenide (CIGSS)…”
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Characterization and device performance of (AgCu)(InGa)Se2 absorber layers by Hanket, G.M., Boyle, J.H., Shafarman, W.N.

“…The study of (AgCu)(InGa)Se 2 absorber layers is of interest in that Ag-chalcopyrites exhibit both wider bandgaps and lower melting points than their Cu…”
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In-situ post-deposition thermal annealing of co-evaporated Cu(InGa)Se2 thin films deposited at low temperatures by Wilson, J.D., McCandless, B.E., Birkmire, R.W., Shafarman, W.N.

“…The effects of deposition temperature and in-situ post-deposition annealing on the microstructure of co-evaporated Cu(InGa)Se 2 thin films and on the…”
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Near-surface defect distributions in Cu(In,Ga)Se2 by Rockett, A., Liao, D., Heath, J.T., Cohen, J.D., Strzhemechny, Y.M., Brillson, L.J., Ramanathan, K., Shafarman, W.N.

“…Authors overview recent results on surface chemistry, transient photocapacitance spectroscopy (TPC) and depth-resolved cathodoluminescence (CL) for…”
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Near-surface defect distributions in Cu(In,Ga)Se 2 by Rockett, A., Liao, D., Heath, J.T., Cohen, J.D., Strzhemechny, Y.M., Brillson, L.J., Ramanathan, K., Shafarman, W.N.

“…The density and distribution of point defects in Cu(In,Ga)Se 2 (CIGS) layers used for solar cell applications is critical to the resulting device performance…”
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New Cd-free buffer layer deposited by PVD: In 2S 3 containing Na compounds by Barreau, N., Bernède, J.C., Marsillac, S., Amory, C., Shafarman, W.N.

“…In this paper it is first shown that In 2S 3 containing sodium (BINS) thin films can be grown on glass substrates heated at 200 °C. The films have a n-type…”
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