Results 271 to 280 of about 17,007 (304)

Stark effect in individual luminescent centers observed by tunneling luminescence

Applied Physics Letters, 1996
We have measured photon emission from individual luminescent states in GaInP/InP heterostructures, containing InP dots, using local injection from a scanning tunneling microscope tip. By changing the tip-sample bias we are able to see the Stark shift of the emission peaks, as well as the onset of impact ionization.
J. Lindahl, M.-E. Pistol, L. Montelius, L. Samuelson   +3 more
openaire   +1 more source

Luminescence centers in α-Bi2O3 ceramics

Journal of Applied Spectroscopy, 2008
Luminescence photoexcitation spectra of α-Bi2O3 ceramics are investigated. Luminescence spectra were deconvoluted into fundamental components using the Alentsev-Fok method. It is established that the luminescence spectra of α-Bi2O3 ceramics consist of three fundamental bands with maxima at 2.75, 2.40, and 1.97 eV. A comparison of the results with those
O. M. Bordun, I. I. Kukharskii, V. V. Dmitruk, V. G. Antonyuk, V. P. Savchin   +4 more
openaire   +1 more source

Luminescence spectrum of the f-center in CaO

Physics Letters A, 1974
Abstract Measurements of the F-center luminescence spectrum in additively colored CaO show that previously reported bands at 1.8 and 2.5 eV are not related to transitions of this two-electron defect.
J.B. Bates, R.F. Wood
openaire   +1 more source

The energy transfer to the luminescence centers in PbWO4

Radiation Measurements, 1998
Abstract The luminescence spectra, rise and decay kinetics and the yield of luminescence in undoped PbWO 4 crystals were studied after pulsed electron beam irradiation. The luminescence intensity rise observed after irradiation pulse showed two mechanisms—excitonic relaxation and electron–hole recombination—were involved in the formation of the ...
D. Millers, S. Chernov, L. Grigorjeva, V. Pankratov   +3 more
openaire   +1 more source

Luminescence centers in Pb2Bi6O11 and Sn2Bi6O11 ceramics

Journal of Applied Spectroscopy, 2006
We have studied the luminescence spectra and luminescence excitation spectra of Pb2Bi6O11 and Sn2Bi6O11 ceramics at 80 K. We have used the Alentsev-Fock to decompose the spectra into elementary components. We have established that the luminescence spectra of Pb2Bi6O11 and Sn2Bi6O11 ceramics contain three elementary bands each with maxima at 2.60, 2.32,
O. M. Bordun, I. I. Kukharskii, V. V. Dmitruk, Yu. B. Kotsan   +3 more
openaire   +1 more source

Luminescence of Oxygen Centers in Aluminum Nitride

1973
The electronic structure of the luminescent centers of non-activated AlN is studied by the method of emission and excitation spectra. Besides the UV-band with the maximum at 3.37 eV, “self-activated” AlN reveals a band at 2.33 eV in the visible, the position of which depends on the wavelength of the exciting radiation.
J. Pastrnák, S. Pacesová, J. Schanda, J. Rosa   +3 more
openaire   +1 more source

Luminescence centers in Y2O3

Journal of Applied Spectroscopy, 1995
O. M. Bordun, I. M. Bordun, S. S. Novosad   +2 more
openaire   +1 more source

Phonon-Assisted Luminescence in Defect Centers from Many-Body Perturbation Theory

Physical Review Letters, 2022
Francesco Libbi, Pedro Miguel M C de Melo, Zeila Zanolli   +2 more
exaly  

Amphoteric center of luminescence in CdS

2017
The impurity photoluminescence of cadmium sulphide crystals is studied. The luminescence intensity dependences on temperature from 80 to 300 K are obtained for the bands at 1.7 and 2 eV. The thermal curve of 1.7 eV luminescence intensity has a peak between 100 and 150 K.
Artem'jeva, O. O., Vakulenko, O. V., Dacenko, O. I.   +2 more
openaire   +1 more source

Nature and shape of the luminescence spectra of surface luminescence centers

Journal of Applied Spectroscopy, 1974
V. V. Styrov, V. D. Khoruzhii
openaire   +1 more source