Ograniczanie wyników
Czasopisma help
Lata help
Autorzy help
Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników
Znaleziono wyników: 19
first rewind previous Strona / 1 next fast forward last
Wyszukiwano:
w słowach kluczowych:  photoconductivity
help Sortuj według:

help Ogranicz wyniki do:
1
100%
Polish Journal of Chemistry
2006 Vol. 80, nr 11 1899-1907
EN The properties of low molecular weight molecules, in which the electron-acceptor fullerene unit was linked by malonate group and flexible long alkyl chains to two biphenyl-phenyl units, were studied. Cyclic voltammetry measurements showed five consecutive one-electron, reversible electro-reductions [...]
2
80%
Materials Science Poland
2009 Vol. 27, No. 3 781--795
EN Some optical and electrical properties of 3-diethylamino-1-propylsulfonamide substituted zinc and metal-free phthalocyanines are presented. These materials are sensitive to NO2 even at concentrations as low as 0.1-2.5 ppm. Electrical conductivity and photoconductivity were used as the detection meth[...]
3
80%
Opto - Electronics Review
EN The mechanisms of photocarrier transport through a barrier in the surface space-charge region (SCR) of 2D macroporous silicon structures have been studied at photon energies comparable to that of the silicon indirect band-to-band transition. It was found that the photoconductivity relaxation time wa[...]
4
80%
Opto - Electronics Review
EN In the present paper, ZnO nanoparticles (NPs) with particle size of 20-50 nm have been synthesized by hydrothermal method. UV-visible absorption spectra of ZnO nanoparticles show absorption edge at 372 nm, which is blue-shifted as compared to bulk ZnO. Photoluminescence (PL) and photoconductive devi[...]
5
80%
Polish Journal of Chemistry
EN Photoelectric and photodielectric properties of thin films of diethyl 2,5-dianilinoterephthalate were studied. Both phenomena are strongly influenced by charge carrier trapping. A weak photodielectric response (about 0.5% and 0.01% at the frequencies 102 and 104 Hz, respectively) seems to be associa[...]
6
80%
Materials Science Poland
2005 Vol. 23, No. 4 985--988
EN Measurements of current in the dark and under illumination were carried out at room temperature on samples of semi-insulating (SI) InP:Fe, on which a layer of low resistivity InP:Fe was deposited. A voltage of 25 mV was applied. After the illumination was switched off, a remaining current was observ[...]
7
80%
Opto - Electronics Review
EN Some of the most recent results on the photoconducting and photorefractive properties of cyclometalated complexes are reviewed. Pure compounds show good photoconducting properties, which can be increased by orders of magnitude by doping with fullerenes. In addition, photorefractivity has been observ[...]
8
80%
Opto - Electronics Review
2004 Vol. 12, No. 1 161--164
EN The paper presents investigations of optoelectric and thermal properties of ternary and quaternary II-VI mixed crystals Zn₀.₇Mg₀.₃Se, Zn₀.₈₈Be₀.₁₂Se, Zn₀.₈₃Mg₀.₁₃Be₀.₀₄Se, Zn₀.₈₆Mn₀.₀₈B₀.₀₆Se grown from the melt. The photoluminescence, photoconductivity and photoacoustic amplitude and phase spectra [...]
9
70%
Materials Science Poland
EN Single crystals of good optical quality, made of potassium dihydrogen phosphate (KDP) doped with urea were grown by slow evaporation solution growth technique at a constant temperature of 35 C. Optical absorption and dielectric properties were studied for pure and urea doped KDP crystals. Using powd[...]
10
70%
International Letters of Chemistry, Physics and Astronomy
EN Nanocrystalline thin films of cadmium sulphide were prepared by chemical bath deposition technique onto glass substrate at 60 °C. The deposition parameters were optimized to obtain good quality of nanocrystalline thin films such as, time, precursor concentration, temperature of deposition and pH of [...]
11
70%
Materials Science Poland
2018 Vol. 36, No. 2 235--241
EN High-quality CdS nanocrystalline thin films were grown by sol-gel spin coating method at different solution temperatures on glass substrates. As-deposited films exhibited nanocrystalline phase with hexagonal wurtzite structure and showed good adhesion and smooth surface morphology. It was clearly ob[...]
12
70%
Journal of New Technologies in Environmental Science
EN The method of measuring the electrical conductivity and photoconductivity of semiconductor films with high electrical resistance is described. The developed computer program providing automation of measurements, as well as registration and initial processing of data is presented. The photoelectric p[...]
13
61%
Materials Science
EN Semiconductor sensor selectivity is of the most importance for environment monitoring. The surfach modifications and multi-sensor systems are widely used for the selectivity increasing in commercial sensors. The work presented is an experimental study aimed to show the use of fine vibrational phenom[...]
14
61%
Prace Naukowe Instytutu Technologii Organicznej i Tworzyw Sztucznych Politechniki Wrocławskiej. Konferencje
PL Przeprowadzono syntezę nowych polimerów metakrylanowych z dwufunkcyjnymi monomerami zawierającymi fragment karbazolowy i azofenylosulfonową grupę chromoforową. Określono właściwości fizykochemiczne otrzymanych homo i kopolimerów. Przeprowadzone badania wykazały dobre właściwości fotoelektrycznych ba[...]
EN A novel bi-functional photorefractive methacrylate polymer with carbazolyl fragments and chromophoric azophenyl sulfonyl group were synthesized and characterized. Photoelectrical properties were revealed by the generation of photocurrents on illumination. The addition of TNF resulted in a considerab[...]
15
61%
Elektronika : konstrukcje, technologie, zastosowania
PL W pracy dokonano klasyfikacji wszystkich, stosowanych w technice źródeł promieniowania elektromagnetycznego, w zakresie energii od kilku eV do tysięcy eV. Stwierdzono, że między monochromatycznymi wiązkami promieniowania pochodzącymi ze wzbudzonych gazów lub par a promieniowaniem rentgenowskim wystę[...]
EN In the work, all electromagnetic sources of radiation from few eV to thousands eV are classified, wchich may be applied in technics and physics. It was noticed that "empty" range of energies (11...-100 eV) exists between the monochromatic beams originating from gas lamps or vapour lamps and the X-ra[...]
16
61%
Elektronika : konstrukcje, technologie, zastosowania
PL Warstwy krzemu porowatego otrzymano metodą elektochemicznej anodyzacji krzemu typu p. Wykonano pomiary krzemu typu p. Wykonano pomiary przebiegów czasowych fotonapięcia dla różnych długości fal światła wzbudzającego w różnych temperaturach. Pomiary pozwoliły wyznaczyć ruchliwość nośników prądu oraz [...]
EN Porous silicon layers were produced by electrochemical anodisation method. Photocurrent curves at different wavelength of excitation, temperatures and polarization voltages have been measured. Mobility of carriers and deep level energies were determined from photovoltage curves.
17
61%
Materials Science Poland
2015 Vol. 33, No. 4 826--834
EN Synthesis and characterization of a highly efficient photoconductive nanocomposite comprising of two common metal oxides: copper oxide (CuO) and silicon dioxide (SiO2>/sub>) are being reported in this paper. The CuO/SiO2 nanocomposite has been synthesized using a cost-effective and f[...]
18
61%
Opto - Electronics Review
EN This paper presents the current state of a photoconductive semiconductor switch engineering. A photoconductive semiconductor switch is an electric switch with its principle of operation based on the phenomenon of photoconductivity. The wide application range, in both low and high-power devices or in[...]
19
51%
Przegląd Elektrotechniczny
2017 R. 93, nr 10 103--106
PL Półprzewodnikowy przełącznik fotokonduktancyjny to urządzenie, w którym w wyniku pobudzenia sygnałem optycznym, następuje wzrost koncentracji nośników ładunku powodując zmniejszenie oporności materiału półprzewodnikowego nawet o kilka rzędów wielkości. W artykule przedstawiono wybrane aspekty projek[...]
EN A photoconductive semiconductor switch is a device in which density of charge carriers increases causes decreases resistivity of semiconductor as a result of optically triggered. This paper shows selected aspects of photoconductive semiconductor switches designing with regards issue related to the s[...]
first rewind previous Strona / 1 next fast forward last