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Showing 1 to 20 of 75 for “"photoconductivity"”.
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Photoconductivity in amorphous silicon
… absorption, dark d.c. conductivity, steady state photoconductivity, step response transient rise photoconductivity and impulse response flash decay photoconductivity have been made. In addition, computer simulation has been used to give an insight into the physical processes involved in the …
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Photoconductivity in Potassium-Bromide
Made available in DSpace on 2015-05-12T21:41:31Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6503198.PDF: 3263550 bytes, checksum: cb9db4e8830e8a46cdb713eda3e5d6fd (MD5) Previous issue date: 1964
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Photoconductivity in potassium bromide
Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-04-13T20:32:34Z No. of bitstreams: 1 1964_crandall.pdf: 5648547 bytes, checksum: b758a4ddd4928e1a4a21e635c61b3c5e (MD5)
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Two Quantum Photoconductivity in Potassium-Iodide
Made available in DSpace on 2015-05-12T21:41:58Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7105051.PDF: 2996332 bytes, checksum: 0afc017075bb441e5e8d8fd72f9e4d5d (MD5) Previous issue date: 1970
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Two quantum photoconductivity in potassium iodide
Photoconductivity associated with two quantum absorption processes have been observed in uncolored crystals of KI. A Q-switched ruby laser and a KDP harmonic generator were used to produce light pulses whose quantum energy is more than half the band gap energy. The phbtbresponse in KI depends upon …
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Photoconductivity in Germanium at Liquid Helium Temperatures
Made available in DSpace on 2015-05-12T17:11:52Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 0010523.PDF: 3093080 bytes, checksum: 37a9a8ff9358076b6676ca90c10f706e (MD5) Previous issue date: 1954
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Photoconductivity in Potassium-Bromide Containing F-Centers
Made available in DSpace on 2015-05-12T17:12:17Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6003987.PDF: 1905892 bytes, checksum: 21a40b8a87ccde0b6689c601daa7e97e (MD5) Previous issue date: 1960
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Thermally stimulated currents and photoconductivity in microcrystalline silicon
This thesis focuses on the characterization of microcrystalline silicon ( c-Si:H) samples by numerically simulated and experimental thermally stimulated currents (TSC). TSC measurements and simulations demonstrate in detail two different retrapping regimes (strong and weak). A combined experiment - …
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Transient Photoconductivity in Silver-Chloride at Low Temperatures
Made available in DSpace on 2015-05-12T17:12:12Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 5805511.PDF: 4297192 bytes, checksum: 84301ac3bfe3c50fad797480b1d4dc14 (MD5) Previous issue date: 1958
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Optical characterization of compound semiconductors using photoconductivity and photoreflectance
… photoreflectance modulation spectroscopy and photoconductivity spectroscopy set-ups were constructed and used to characterize semiconductor materials. The ternary Cd1--xZnxTe compound was studied to achieve fine control over its composition to provide lattice-matched substrates for the growth …
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Time and frequency resolved photoconductivity studies on amorphous semiconductors
Time and frequency domain photoconductivity experiments and analysis assuming the multiple trapping transport model are used in a complementary fashion to investigate the density of states (DOS) and associated trapping and recombination parameters of amorphous semiconductors. The solution of the …
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Photoconductivity studies of the ferrocyanide ion under high pressure
… apparatus was developed for the investigation of photoconductivity phenomena in liquids pressurized up to 10 kbar. A variety of exciting light sources could be used. In nonpolar solvents, with an applied d.c. voltage, photo-currents as small as 10 p.a. could be resolved. In aqueous solutions, with …
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Steady state and transient photoconductivity in n-type amorphous silicon
Comprehensive measurements of secondary photoconductivity with steady optical excitation (SSPC), transient excitation (TPC), and steady state optical bias plus transient excitation (OB) were carried out on samples of glow-discharge produced n-type a-Si:H from two sources, lightly doped with …
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Persistent photoconductivity and deep levels in aluminum gallium indium phosphide
… related to the observation of persistent photoconductivity at certain compositions. In this thesis the persistent photoconductivity and related deep levels in ($\rm Al\sb{x}Ga\sb{1-x})\sb{0.5}In\sb{0.5}P$ were studied by capacitance versus temperature measurements and by constant …
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Experimental and phenomenological study of persistent photoconductivity in YBa2Cu3O6 thin films
Persistent Photoconductivity in YBa_2Cu_3O_{6+x} thin films is studied by means of infrared photoconductivity measurements after the films have been illuminated with visible light at low temperature. Experimentally, the effect is characterized by the samples' electrical response to infrared light, …
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Mechanism and Applications of large and persistent photoconductivity in cadmium sulfide
Photoconductivity is the phenomenon where electrical conductivity changes as a result of photoexcitation of new charge carriers. In some semiconductors, photoconductivity is accompanied with enormous conductivity change and long decay time after photoexcitation is ceased. This effect is called …
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Photoconductivity and minority carrier lifetime in tin sulfide and gallium arsenide semiconductors for photovoltaics
… of 1018 cm-3, 1016 cm-3, and 1015 cm-3 through photoconductivity measurements. Films are 1 [mu]m thick and have a four-bar and two-bar contact configuration to model carrier conductivity as a sheet. For calculations, two methods of modeling charge carrier generation are considered; a uniform …
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A far-infrared Michelson interferometer and its application to the study of photoconductivity in ultra-pure germanium
Contains fulltext : mmubn000001_026603683.pdf (Publisher’s version ) (Open Access)
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Effect of synthesis conditions on large and persistent photoconductivity in chemical bath deposited cadmium sulfide thin films
Persistent photoconductivity (PPC) has been observed in numerous semiconductors and dielectrics. It refers to the phenomenon that photoconductivity can last for a long time after photo-excitation is terminated. In most cases, the causes of PPC are unknown, and the connections between synthesis …
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Experimental validation of the predicted emergent magnetism in diamagnetic cadmium sulfide (Cds) doped with boron
The large and persistent photoconductivity displayed by some semiconductors provides a way to control magnetism with light, through illumination-control of free carrier concentration and thereby magnetic interaction in dilute magnetic semiconductors. CdS is a wide band-gap semiconductor that …
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