Search Results - "Dhere, R.G."

Research strategies toward improving thin-film CdTe photovoltaic devices beyond 20% conversion efficiency by Gessert, T.A., Wei, S.-H., Ma, J., Albin, D.S., Dhere, R.G., Duenow, J.N., Kuciauskas, D., Kanevce, A., Barnes, T.M., Burst, J.M., Rance, W.L., Reese, M.O., Moutinho, H.R.

“…Recent studies of thin-film CdS/CdTe photovoltaic (PV) devices have suggested that a significantly higher device performance will not be achieved unless…”
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Rietveld analysis of CdS/CdTe thin film junctions submitted to a CdCl2 heat treatment by Antolin, G.D.C., Dhere, R.G., de Avillez, R.R., Cruz, L.R.

“…In this work we investigate the effects of a CdCl2 heat treatment on the interface of CdTe/CdS heterojunction solar cells using Rietveld analysis of X-ray…”
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Influence of heat treatment and back contact processing on the performance of CdS/CdTe thin film solar cells produced in a CSS in-line system by Cruz, L.R., Pinheiro, W.A., Medeiro, R.A., Ferreira, C.L., Dhere, R.G., Duenow, J.N.

“…CdS/CdTe photovoltaic cells were grown in a homemade close-spaced sublimation equipment where all steps of cell fabrication are carried out continuously,…”
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The direct correlation of CDTE solar cell stability with mobile ion charge generation during accelerated lifetime testing by Albin, D.S., Dhere, R.G., Glynn, S.C., Metzger, W.K.

“…CdS/CdTe cells deposited on cadmium and zinc stannate (CTO/ZTO) transparent conducting oxide (TCO) substrates show greater degradation than similar devices…”
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Dependence of carrier lifetime on Cu-contacting temperature and ZnTe:Cu thickness in CdS/CdTe thin film solar cells by Gessert, T.A., Metzger, W.K., Dippo, P., Asher, S.E., Dhere, R.G., Young, M.R.

“…Cu diffusion from a ZnTe:Cu contact interface can increase the net acceptor concentration in the CdTe layer of a CdS/CdTe photovoltaic solar cell. This reduces…”
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A comparative study of microstructural stability and sulphur diffusion in CdS/CdTe photovoltaic devices by Taylor, A.A., Major, J.D., Kartopu, G., Lamb, D., Duenow, J., Dhere, R.G., Maeder, X., Irvine, S.J.C., Durose, K., Mendis, B.G.

“…The role of CdCl2 activation in the production of high quality CdTe-based photovoltaic devices remains a subject of much debate. In this study, CdTe-based…”
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Deposition and properties of CBD and CSS CdS thin films for solar cell application by Moutinho, H.R., Albin, D., Yan, Y., Dhere, R.G., Li, X., Perkins, C., Jiang, C.-S., To, B., Al-Jassim, M.M.

“…We deposited cadmium sulfide (CdS) thin films using the chemical-bath deposition (CBD) and close-spaced sublimation (CSS) techniques. The films were then…”
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Fabrication procedures and process sensitivities for CdS/CdTe solar cells by Rose, Doug H., Hasoon, Falah S., Dhere, Ramesh G., Albin, Dave S., Ribelin, Rosine M., Li, Xiaonan S., Mahathongdy, Yoxa, Gessert, Tim A., Sheldon, Pete

“…This paper details the laboratory processes used to fabricate CdS/CdTe solar cells at the National Renewable Energy Laboratory. The basic fabrication technique…”
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Electrical properties of CdTe/CdS solar cells investigated with conductive atomic force microscopy by Moutinho, H.R., Dhere, R.G., Jiang, C.-S., Al-Jassim, M.M., Kazmerski, L.L.

“…We report on the application of conductive atomic force microscopy (C-AFM) for studying the electrical properties of CdTe/CdS solar cells, and discuss the…”
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Processing and Properties of Sub-Micron CIGS Solar Cells by Ramanathan, K., Noufi, R., To, B., Young, D.L., Bhattacharya, R., Contreras, M.A., Dhere, R.G., Teeter, G.

“…We report on the progress in fabricating CIGS solar cells where the absorber thickness is nominally about 1-mum. This is done with the objective of reducing…”
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CdS/CdTe thin film solar cells on low cost substrates by Ramanathan, K., Dhere, R.G., Coutts, T.J., Chu, T.L., Chu, S.

“…CdS/CdTe polycrystalline thin-film solar cells have been fabricated on tin oxide coated soda-lime glass substrates. CdS thin-films were grown from aqueous…”
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Investigation of junction properties of CdS/CdTe solar cells and their correlation to device properties by Dhere, R.G., Zhang, Y., Romero, M.J., Asher, S. E., Young, M., To, B., Noufi, R., Gessert, T.A.

“…Secondary-ion mass spectrometry analysis of the CdS/CdTe interface shows that S diffusion in CdTe increases with substrate temperature and CdCl 2 heat…”
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Investigation of induced recrystallization and stress in close-spaced sublimated and radio-frequency magnetron sputtered CdTe thin films by Moutinho, H. R., Dhere, R. G., Al-Jassim, M. M., Levi, D. H., Kazmerski, L. L.

“…We have induced recrystallization of small grain CdTe thin films deposited at low temperatures by close-spaced sublimation (CSS), using a standard CdCl 2…”
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Beam injection methods for characterizing thin-film solar cells by Romero, Manuel J., Al-Jassim, Mowafak M., Dhere, Ramesh G., Hasoon, Falah S., Contreras, Miguel A., Gessert, Timothy A., Moutinho, Helio R.

“…II–VI and I–III–VI solar cells are promising for future thin‐film photovoltaics. In this paper, the roles of electron‐beam‐induced current (EBIC) and…”
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Effects of Cu diffusion from ZnTe:Cu/Ti contacts on carrier lifetime of CdS/CdTe thin film solar cells by Gessert, T.A., Metzger, W.K., Asher, S.E., Young, M.R., Johnston, S., Dhere, R.G., Moriarty, T., Duda, A.

“…We study the performance of CdS/CdTe thin film PV devices processed with a ZnTe:Cu/Ti contact to investigate how carrier lifetime (τ) in the CdTe layer is…”
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Recrystallization of PVD CdTe thin films induced by CdCl2 treatment - A comparison between vapor and solution processes by Moutinho, H.R., Dhere, R.G., Romero, M.J., Jiang, C.-S., To, B., Al-Jassim, M.M.

“…The untreated physical-vapor-deposited CdTe films had small grains, with ≪111≫ texture, and a large concentration of deep levels. For CdCl 2 treatments at…”
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Comparison of transparent back contacts for CdTe top cells in tandem thin-film photovoltaic devices by Duenow, J.N., Barnes, T.M., Dhere, R.G., Bergeson, J.D., Larson, B.A., Blackburn, J.L., Duda, A., Teeter, G., Gessert, T.A.

“…Two-junction tandem thin-film photovoltaic cells are composed of a wide-bandgap top cell overlying a narrower-bandgap bottom cell. CdTe, with a bandgap of 1.5…”
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The influence of post-deposition treatment on the physical properties of CdTe films deposited by stacked elemental layer processing by Cruz, L.R., Kazmerski, L.L., Moutinho, H.R., Hasoon, F., Dhere, R.G., de Avillez, R.

“…Cadmium telluride thin films have been deposited on glass and glass/SnO 2/CdS substrates using the stacked elemental layer (SEL) technique. After the films…”
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Cross-sectional atomic force microscopy imaging of polycrystalline thin films by Ballif, C, Moutinho, H.R, Hasoon, F.S, Dhere, R.G, Al-Jassim, M.M

“…Atomic force microscopy (AFM) can be used to image cross-sections of thin-film samples. So far, however, it has mainly been used to study cross-sections of…”
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Cross-Sectional Conductive Atomic Force Microscopy of CdTe/CdS Solar Cells: Effects of Etching and Back-Contact Processes by Moutinho, H.R., Dhere, R.G., Jiang, C.-S., Gessert, T., Duda, A., Young, M., Metzger, W.K., Li, X., Al-Jassim, M.M.

“…We investigated the effects of the etching processes using bromine and nitric-phosphoric acid solutions, as well as of Cu, in the bulk electrical conductivity…”
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