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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:33 |
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Conference: Bucharest University Faculty of Physics 2002 Meeting
Section: Electricity and Biophysics: Honorary Session Dedicated to Professors: Victor Gheorghe (Head of the Dept. 1972-1984) and Grigore Turcu
Title:
The Effect Of The Electron Irradiation On The Electrical Properties Of A2-B6 Thin Polycrystalline Layers: A Review
Authors:
S. Antohe, L. Ion, V. Ruxandra and V. A. Antohe
Affiliation:
Faculty of Physics, University of Bucharest, P.O. Box MG-11, Bucharest-Magurele,76900 - Romania,
E-Mail of corresponding author: s_antohe@yahoo.com
santohe@solid.fizica.unibuc.ro
E-mail
Keywords:
Abstract:
The electrical properties of the non-irradiated and electron irradiated structures, containing polycrystalline thin layers of CdSe and CdS, sandwiched between two gold electrodes, were investigated . The thin films of CdSe and CdS were obtained through thermal-vacuum evaporation on the glass substrate at temperature of 220 *C. After the investigation of their structure by X-ray diffraction (XRD), the samples were subjected to two sessions of irradiation with 7 MeV electrons to different fluences. The current-voltage characteristics, recorded at temperatures in the range 150÷400 K, showed that the Ohm’s law is followed at low-applied voltages, in both non-irradiated and irradiated CdSe and CdS layers. In the range of high-applied voltages, the space-charge-limited-current (SCLC), controlled by different types of trap distribution, placed in the band gape of the semiconducting layer, has been identified as the dominant conduction mechanism. An analysis in the frame of SCLC theory allowed us to obtain the parameters characterizing the trap distributions and the changes induced by electron irradiation.
Keywords: polycrystalline layers, CdSe, CdS, electron irradiation
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