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Photoelectromotive force

It was found that preliminary ultraviolet irradiation alters the photoelectrical sensitivity. Figure 23 represents the spectral response curves for the photoconductivity (curve 1) and the photoelectromotive force (curve 3) of poly (PiP -diethynylazobenzene). [Pg.38]

Fig. 23. Spectra photoconductivity of poly(p,p -diethynylazobenzene ]), the same after 10 min under ultraviolet irradiation (2) photoelectromotive force (3) absorption in diffuse reflection (4) [95]... Fig. 23. Spectra photoconductivity of poly(p,p -diethynylazobenzene ]), the same after 10 min under ultraviolet irradiation (2) photoelectromotive force (3) absorption in diffuse reflection (4) [95]...
The presence of a photoconductivity peak at 610 nm at the threshold of the absorption spectrum (curve 4) is a common phenomenon in inorganic semiconductors and is explained by competition between surface and volume recombination processes of the charge carriers. The optical activation energy determined from the spectral photoconductivity threshold is equal to 1.82 + 0.02 eV. The thresholds of the photoelectromotive force and the absorption spectra are likewise in agreement with this value. It is remarkable that the same value has been found for the activation energy of the dark conductivity in this polymer... [Pg.39]

Fig. 40. Photoelectromotive force (1J) and luminescence (3,4) spectra of polycopperphenylacetylen-ide before (1,3) and after (2,4) preliminary ultraviolet illumination [270]... Fig. 40. Photoelectromotive force (1J) and luminescence (3,4) spectra of polycopperphenylacetylen-ide before (1,3) and after (2,4) preliminary ultraviolet illumination [270]...
Fig. 44. Spectra for the photoelectromotive force of polycopperphenylacetylenide curve (/) before, curves (22) after immersing in 1 x 10 3 ethanol solution of methylene blue curve (5) - absorption spectrum of the solution [20]... Fig. 44. Spectra for the photoelectromotive force of polycopperphenylacetylenide curve (/) before, curves (22) after immersing in 1 x 10 3 ethanol solution of methylene blue curve (5) - absorption spectrum of the solution [20]...
Fig. 45. Photoelectromotive force spectra for polycopperphenylacetylenide sensitized by methylene Hue. Curves (1,1 ) after 10 min stay in air curves (2,T) the same sample after 24 hours stay curves (3,3 ) the same after five days stay [20]... Fig. 45. Photoelectromotive force spectra for polycopperphenylacetylenide sensitized by methylene Hue. Curves (1,1 ) after 10 min stay in air curves (2,T) the same sample after 24 hours stay curves (3,3 ) the same after five days stay [20]...
Fig. 49. Photoelectromotive force spectra of the magnesium phthalocyanine in polystyrol (/), polyvinyl carbazole (2), luvican (i) [285]... Fig. 49. Photoelectromotive force spectra of the magnesium phthalocyanine in polystyrol (/), polyvinyl carbazole (2), luvican (i) [285]...
The scheme of reactions (5)-(8) is similar in certain aspects to that of electron transfer processes occurring in the membranes of photosynthesiz-ing organisms, where the light absorption also induces a trans-membrane potential difference. The above scheme of processes in multilayer systems explaining the appearance of the photoelectromotive force requires further refinement. But even the data available at present allow these systems to be regarded firstly as convenient models for analyzing the processes occurring... [Pg.322]

The detectors oommonly used in laser ultrasonics include various types of interferometers, which are sensitive to the displacement or velocity of the surface, and of knife-edge e.g. photoelectromotive force reoeivers) detectors, which are sensitive to the tilt of the sample surface [27]. [Pg.306]

The applications of semiconductors materials are discussed in Volume 2. The various topics on semiconductor devices include Si/GeSi heterostructures for Si-based nanoelectronics, impact ionization in compound semiconductor devices, quantum dot optoelectronic devices, failure mechanisms in compound semiconductors, electron devices, semiconductor quantum materials and their applications in electronics and optoelectronics, and photoelectromotive force effects in semiconductors. [Pg.367]


See other pages where Photoelectromotive force is mentioned: [Pg.255]    [Pg.49]    [Pg.66]    [Pg.53]    [Pg.51]    [Pg.255]    [Pg.49]    [Pg.66]    [Pg.53]    [Pg.51]   
See also in sourсe #XX -- [ Pg.322 ]




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