Physics – Condensed Matter – Materials Science
Scientific paper
2011-01-28
Acta physica polonica A, Vol. 117, No. 1, 2010, p. 333-338
Physics
Condensed Matter
Materials Science
6 pages, 3 figures, Proceedings of the International Workshop "Oxide Materials for Electronic Engineering" (OMEE-2009), Lviv 2
Scientific paper
As a result of absorption of X-ray quantum in a semiconductor, the generation of electron-hole pairs takes place in a small volume (diameter < 0.5 mkm). Their surplus energy is lost due to the scattering on phonons of the crystal lattice. Spatial distribution of the charge carriers makes the form of current pulse on electrodes of the crystal complicated when an external electric field is applied. We present a logical chart of construction of basic kinetic model of X-ray conductivity in semiconductors that uses the successive in time calculation of the spatial distribution of free charge arriers and the diffusive-drift model of motion of free carriers in a solid. The basic form of current pulse in an external circle was obtained in the analytical kind for the case of an ideal semiconductor, e.g. that does not contain deep traps and recombination centers, as well as for the case of a crystal with dominant shallow or deep traps of electrons and holes.
Degoda Ya. V.
Sofienko A. O.
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