Impurities and impurity absorption in pure and doped CSS-13 crystals

1993 ◽  
Vol 59 (5-6) ◽  
pp. 884-890
Author(s):  
L. G. Skornyakov ◽  
A. V. Gur'ev ◽  
V. D. Zhuravlev
Keyword(s):  
Impurity Absorption

scholarly journals Shallow Impurity Absorption Spectroscopy in Isotopically Enriched Silicon

2007 ◽  
Author(s):  
M. Steger ◽  
A. Yang ◽  
D. Karaiskaj ◽  
M. L. W. Thewalt ◽  
E. E. Haller ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Impurity Absorption ◽  
Shallow Impurity

scholarly journals Локализованные экситоны в спектре оптического поглощения оксида цинка, легированного марганцем

2019 ◽  
Vol 61 (5) ◽  
pp. 817
Author(s):  
В.И. Соколов ◽  
Н.Б. Груздев ◽  
В.А. Важенин ◽  
А.В. Фокин ◽  
А.В. Дружинин
Keyword(s):  
Zinc Oxide ◽  
Charge Transfer ◽  
Absorption Band ◽  
Optical Absorption ◽  
Absorption Spectra ◽  
Polarized Light ◽  
Threshold Energy ◽  
Impurity Absorption ◽  
Charge Transfer Transitions ◽  
Long Time

AbstractThe results of the study of optical absorption and EPR signals of single crystals of zinc oxide doped with manganese are presented. A broad impurity absorption band with the threshold energy about 2.1 eV, which was treated as a result of charge transfer transitions, has been observed for a long time in ZnO : Mn absorption spectra. In absorption spectra of a polarized light at 4.2 and 77.3 K, we first detected several lines of different intensity in a 1.877–1.936 eV range of energies of the light quanta. The observed lines are attributed to a donor exciton [( d ^5 + h ) e ] that emerges as a result of the Coulomb binding a free s electron and a hole, which is localized on p – d hybridized states. The EPR spectra of Mn^2+ ion signals, when corresponding to the impurity absorption band exposed to light, are found to be not photosensitive. The obtained results indicate that the ZnO : Mn impurity absorption is due to transitions from antibonding p – d hybridized DBH states to the conduction band.

IR Impurity Absorption in GeS2-In2S3-AgI Chalcohalide Glasses

2011 ◽  
pp. 231-234 ◽  
Author(s):  
Taras Kavetskyy ◽  
Nataliya Pavlyukh ◽  
Volodymyr Tsmots ◽  
Wei Wang ◽  
Jing Ren ◽  
...  
Keyword(s):  
Impurity Absorption ◽  
Chalcohalide Glasses

Urbach's rule in impurity absorption

1969 ◽  
Vol 47 (16) ◽  
pp. 1703-1708 ◽  
Author(s):  
Dennis Dunn
Keyword(s):  
Absorption Spectrum ◽  
Absorption Coefficient ◽  
Photon Energy ◽  
Valence Electron ◽  
Impurity State ◽  
Function Technique ◽  
Absorption Process ◽  
Impurity Absorption ◽  
Long Wavelength ◽  
State Electron

We have investigated theoretically the shape of the long-wavelength edge of the impurity absorption spectrum in an insulator (or semiconductor) by means of a Green's function technique. The absorption process is assumed to be the excitation of a valence electron into a previously unoccupied impurity state. We have shown that Urbach's rule is obeyed, that is the absorption coefficient depends exponentially upon the photon energy, if either the valence electron or the impurity state electron is coupled strongly to monoenergetic phonons.

Impurity absorption in spherical quantum dots

1996 ◽  
Author(s):  
E. Menéndez ◽  
C. Trallero-Giner ◽  
E. Casado
Keyword(s):  
Quantum Dots ◽  
Impurity Absorption
Sign in / Sign up

Export Citation Format

Share Document