Search Results - "Khattak, C."

A reflectance spectroscopy-based tool for high-speed characterization of silicon wafers and solar cells in commercial production by Sopori, B, Rupnowski, P, Guhabiswas, D, Devayajanam, S, Shet, S, Khattak, C P, Albert, M

“…Some new applications of reflectance spectroscopy using the GT FabScan are described, which make this system highly desirable for process monitoring in…”
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Fabrication and analysis of record high 18.2% efficient solar cells on multicrystalline silicon material by Rohatgi, A., Narasimha, S., Kamra, S., Khattak, C.P.

“…Solar cell efficiencies of 18.2% (1 cm 2 areas) have been achieved using a process sequence which involves impurity gettering on 0.65 /spl Omega/-cm…”
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Record high 18.6% efficient solar cell on HEM multicrystalline material by Rohatgi, A., Narasimha, S., Kamra, S., Doshi, P., Khattak, C.P., Emery, K., Field, H.

“…Solar cells with efficiencies as high as 18.6% (1 cm/sup 2/ area) have been achieved by a process which involves impurity gettering and effective back surface…”
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Influence of KCl on the growth of YBa2Cu3O6+δ from high temperature solutions by RAO, S. M, CHANG, R. H, LAW, K. S, WU, M. K, KHATTAK, C. P

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Kerf reduction using shaped wire by Schmid, F., Smith, M.B., Khattak, C.P.

“…The photovoltaic industry is expected to grow at an increased rate and most modules use crystalline silicon wafers. Since silicon material and slicing costs…”
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Residual infrared absorption in As-grown and annealed crystals of Ti:Al2O3 by AGGARWAL, R. L, SANCHEZ, A, STUPPI, M. M, FAHEY, R. E, STRAUSS, A. J, RAPOPORT, W. R, KHATTAK, C. P

“…Data for as-grown and partially oxidized samples of Ti:Al2O3 grown by the vertical-gradient-freeze technique show that the residual infrared absorption in…”
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Characteristics of HEM silicon produced in a reusable crucible by Khattak, C.P., Schmid, F., Schubert, W.K., Cudzinovic, M., Sopori, B.L.

“…A reusable crucible has been developed for directional solidification of multicrystalline silicon ingots by HEM. Up to five 40 kg, 33 cm square cross section…”
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Growth of the world's largest sapphire crystals by Khattak, C P, Schmid, F

“…Sapphire crystals up to 34 cm diameter, 65 kg, are grown in production using the heat exchanger method (HEM). The properties of sapphire that are important for…”
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The optimization and fabrication of high efficiency HEM multicrystalline silicon solar cells by Narasimha, S., Kamra, S., Rohatgi, A., Khattak, C.P., Ruby, D.

“…Solar cell efficiencies as high as 18.2% (1 cm/sup 2/ area) have been achieved using a process sequence which involves impurity gettering on 0.65 /spl…”
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High-efficiency solar cells using HEM silicon by Khattak, C.P., Schmid, F., Schubert, W.K.

“…Developments in heat exchanger method (HEM) technology for production of multicrystalline silicon ingot production have led to growth of larger ingots (55 cm…”
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Sapphire sparkles in many optical elements by SCHMID, F, KHATTAK, C. P, FELT, D. M

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A simple process to remove boron from metallurgical grade silicon by Khattak, Chandra P, Joyce, David B, Schmid, Frederick

“…It is necessary to develop solar grade (SoG) silicon for the photovoltaic industry. A desirable approach is to upgrade metallurgical grade (MG) silicon. The…”
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Low-Cost Multicystalline Silicon Wafers by Purifying Metallurgical Grade Silicon with Tin Solution by Yuepeng Wan, Raghavan, P.S., Chartier, C., Talbott, J., Khattak, C.

“…The PV industry is currently facing serious difficulty in finding silicon feedstock to shore up their expansion plan to meet the rapid growth of the solar cell…”
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Fabrication and analysis of record high 18.2%25 efficient solar cellson multicrystalline silicon material by Rohatgi, A, Narasimha, S, Kamra, S, Khattak, C P

“…Solar cell efficiencies of 18.2% (1 cm(2) areas) have been achieved using a process sequence which involves impurity gettering on 0.65 Omicron-cm…”
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Growth of the world's largest sapphire crystals by Khattak, Chandra P., Schmid, Frederick

“…Sapphire crystals up to 34cm diameter, 65kg, are grown in production using the heat exchanger method (HEM). The properties of sapphire that are important for…”
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Effect of non-isoelectronic cation substitution on lattice parameters of barium sodium niobate by Mukherjee, Jahar L., Khattak, Chandra P., Gupta, Kedar P., Wang, Franklin F. Y.

“…Ceramic samples of Ba2NaNb5O15, with the cations selectively substituted by Gd or Cr, showed that the changes in their orthorhombic lattice parameters a, b,…”
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Comment on: Jun Dong and Peizhen Deng, “Ti:sapphire crystal used in ultrafast lasers and amplifiers”, Journal of Crystal Growth 261 (2004) 514–519 by Khattak, Chandra P., Joyce, David B.

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Residual infrared absorption in as-grown and annealed crystals of Ti:Al(2)O(3) by Aggarwal, R L, Sanchez, A, Stuppi, M M, Fahey, R E, Strauss, A J, Rapoport, W R, Khattak, C P

“…Data for as-grown and partially oxidized samples of Ti:Al(2 )O(3) grown by the vertical-gradient-freeze technique show that the residual infrared absorption in…”
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Residual infrared absorption in as-grown and annealed crystals of Ti:Al sub(2)O sub(3) by Aggarwal, R L, Sanchez, A, Stuppi, M M, Fahey, R E, Strauss, A J, Rapoport, W R, Khattak, C P

“…Data for as-grown and partially oxidized samples of Ti:Al sub(2)O sub(3) grown by the vertical-gradient-freeze technique show that the residual infrared…”
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Off-diagonal magnetoelectric susceptibility in single crystal Cr2O3 by Khattak, C., Wang, F.

“…Previous studies of magnetoelectric effect in Cr 2 O 3 employed collinear electric and magnetic fields along the rhombohedral c axis or perpendicular to it…”
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