Results 81 to 90 of about 8,900 (218)

A Soft Measurement Method for the Tail Diameter in the Growing Process of Czochralski Silicon Single Crystals

Applied Sciences
In the Czochralski silicon single crystal growth process, the tail diameter is a key parameter that cannot be directly measured. In this paper, we propose a real-time soft measurement method that combines a deep belief network (DBN) and a support vector ...
Lei Jiang, Da Teng, Yue Zhao
doaj   +1 more source

Birefringence Gradient and Exposure Energy of Hf:Yb:Nd:LiNbO3 Crystals with Various [Li]/[Nb] Ratios

Crystals, 2018
A series of Hf:Yb:Nd:LiNbO3 crystals with different [Li]/[Nb] ratios (0.946, 1.05, 1.20, and 1.38) were grown using the Czochralski method. X-ray diffraction phase results of the samples show that the LiNbO3 doped Hf4+, Yb3+, and Nd3+ only have a slight ...
Li Dai, Yu Shao, Xianbo Han, Luping Wang, Yuheng Xu   +4 more
doaj   +1 more source

Advanced Czochralski silicon growth technology for photovoltaic modules [PDF]

Several economic analyses had indicated that large-diameter, multiple ingot growth using a single crucible with melt replenishment would be required for Cz growth to be economically viable. Based on the results of these analyses, two liquid and two solid
Daud, T., Kachare, A. H.
core   +1 more source

Structure of deformed silicon and implications for low cost solar cells [PDF]

The microstructure and minority carrier lifetime of silicon were investigated in uniaxially compressed silicon samples. The objective of the investigation was to determine if it is feasible to produce silicon solar cells from sheet formed by high ...
Digges, T. G., Jr., Leipold, M. H., Mardesich, N., Turner, G. B.   +3 more
core   +1 more source

Copper doped polycrystalline silicon solar cell [PDF]

, 1981
Fabrication of improved performance photovoltaic cells is described.
Daud, T., Koliwad, K. M.
core   +1 more source

Space processing of crystals for opto-electronic devices: The case for solution growth [PDF]

The results obtained during a six month program aimed at determining the viability of space processing in the 1980's of dielectric-elastic-magnetic single crystals were described.
Cross, L. E., Hayden, S. C.
core   +1 more source

Radioactive contamination of ZnWO4 crystal scintillators

, 2010
The radioactive contamination of ZnWO4 crystal scintillators has been measured deep underground at the Gran Sasso National Laboratory (LNGS) of the INFN in Italy with a total exposure 3197 kg x h.
Belli, P., Bernabei, R., Cappella, F., Cerulli, R., d'Angelo, S., Danevich, F. A., Dubovik, A. M., Galashov, E. N., Grinyov, B. V., Incicchitti, A., Kobychev, V. V., Laubenstein, M., Nagornaya, L. L., Nozzoli, F., Poda, D. V., Podviyanuk, R. B., Polischuk, O. G., Prosperi, D., Shlegel, V. N., Tretyak, V. I., Tupitsyna, I. A., Vasiliev, Ya. V., Vostretsov, Yu. Ya.   +22 more
core   +1 more source

Cold crucible Czochralski for solar cells [PDF]

The efficiency and radiation resistance of present silicon solar cells are a function of the oxygen and carbon impurities and the boron doping used to provide the proper resistivity material.
Trumble, T. M.
core   +1 more source

Tests of Sapphire Crystals Produced with Different Growth Processes for Ultra-stable Microwave Oscillators

, 2015
We present the characterization of 8-12 GHz whispering gallery mode resonators machined in high-quality sapphire crystals elaborated with different growth techniques.
Dubois, Benoit, Fluhr, Christophe, Giordano, Vincent, Grop, Serge   +3 more
core   +3 more sources

Crystal Growth and Spectroscopy of Yb²⁺-Doped CsI Single Crystal

Crystals
The single crystals of CsI-Yb2+ were grown, and their spectroscopic studies were conducted. The observed luminescence in CsI-Yb2+ is due to 5d–4f transitions in Yb2+ ions.
Dmitriy Sofich, Alexandra Myasnikova, Alexander Bogdanov, Viktorija Pankratova, Vladimir Pankratov, Ekaterina Kaneva, Roman Shendrik   +6 more
doaj   +1 more source