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Investigation of the impurity tolerance of semicrystalline silicon solar cells silicon impact program

Description: A Veeco resistance heated Czochralski crystal growing furnace was redesigned to allow for the in-situ casting of semicrystalline silicon ingots. The casting technique that is being employed in this program is based upon the Bridgeman technique of crystal growth. Samples of metallurgical grade silicon have been obtained from Ohio-Ferro Alloys corporation and preparation of this material has begun for incorporation into the experimental castings. Initial casting experiments have commenced using p… more
Date: January 1, 1980
Creator: Storti, G.; Regnault, W. & Johnson, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Distribution of zinc, resistivity, and photosensitivity in a Vertical Bridgman grown Cd1-xZnxTe ingot.

Description: We present the results of a comprehensive study of distribution of zinc, resistivity, and photosensitivity in a Cd{sub 1-x}Zn{sub x}Te ingot grown by the Vertical Bridgman method. We used several complementary methods, viz., glow discharge mass spectroscopy, photoluminescence-, resistivity-, and photosensitivity-mapping, along with photo-induced current transient spectroscopy to characterize the material. We identified electronic levels in the band-gap responsible for compensation, recombinatio… more
Date: May 1, 2008
Creator: Babentsov, V.; Franc, J.; Fauler, A.; Fiederle, M. & James, R. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Scintillators with potential to supersede lanthanum bromide

Description: New scintillators for high-resolution gamma ray spectroscopy have been identified, grown and characterized. Our development efforts have focused on two classes of high light yield materials: Europium-doped alkaline earth halides and Cerium-doped garnets. Of the halide single crystals we have grown by the Bridgman method - SrI{sub 2}, CaI{sub 2}, SrBr{sub 2}, BaI{sub 2} and BaBr{sub 2} - SrI{sub 2} is the most promising. SrI{sub 2}(Eu) emits into the Eu{sup 2+} band, centered at 435 nm, with a d… more
Date: June 1, 2009
Creator: Cherepy, Nerine; Payne, Steven; Aszatlos, Steve; Hull, Giulia; Kuntz, J.; Niedermayr, Tom et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Bridgman growth and characterization of bulk single crystals of Ga{sub 1{minus}x}In{sub x}Sb for thermophotovoltaic applications

Description: Thermophotovoltaic generation of electricity is attracting renewed attention due to recent advances in low bandgap (0.5--0.7 eV) III-V semiconductors. The use of mixed pseudo-binary compounds allows for the tailoring of the lattice parameter and the bandgap of the material. Conventional deposition techniques (i.e., epitaxy) for producing such ternary or quaternary materials are typically slow and expensive. Production of bulk single crystals of ternary materials, for example Ga{sub 1{minus}x}In… more
Date: December 1, 1997
Creator: Boyer, J. R. & Haines, W. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Bulk growth of GaSb and Ga{sub 1{minus}x}In{sub x}Sb

Description: GaSb and InGaSb have been demonstrated to be suitable choices for high efficiency thermophotovoltaic (TPV) cells. Synthesis and growth of bulk GaSb single crystals and GaInSb polycrystals have been carried out by the vertical Bridgman technique, with a baffle immersed in the melt and by complete encapsulation of the melt by low melting temperature alkali halides or oxides. The critical roles of the baffle and the encapsulation are discussed. Efforts in obtaining device grade GaSb with superior … more
Date: May 1, 1997
Creator: Dutta, P. S.; Ostrogorsky, A. G. & Gutmann, R. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Analysis of grain boundaries, twin boundaries, and Te precipitates in CdZnTe grown by high-pressure Bridgeman method

Description: Grain boundaries and twin boundaries in commercial Cd{sub 1{minus}x}Zn{sub x}Te, which is prepared by a high pressure Bridgeman technique, have been investigated with transmission electron microscopy, scanning electron microscopy, infrared light microscopy and visible light microscopy. Boundaries inside these materials were found to be decorated with Te precipitates. The shape and local density of the precipitates were found to depend on the particular boundary. For precipitates that decorate g… more
Date: March 1, 1998
Creator: Heffelfinger, J. R.; Medlin, D. L. & James, R. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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