X-ray irradiation effects on the interface of polypyrrole/p-Si structure
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Date
2006
Journal Title
Journal ISSN
Volume Title
Publisher
Azerbaijan National Academy of Sciences Institute of Radiation Problems ve Turkish Atomic Energy Authority
Abstract
The samples were prepared using mirror cleaned and polished (as received from the manufacturer) p-type Si wafers with (100) orientation and 15-20 Q cm resistivity and 300-400 pm thickness. The ohmic contact was made by evaporating A1 on the back of the substrate, followed by a temperature treatment at 600 °C for 3 min in a N2 atmosphere. The native oxide on the front surface of p-Si was removed in a HF:H20 (1:15) soluüon and finally the wafer was rinsed in deionized water before polymerization was carried out. The ohmic contact made and the edges of the p-Si substrate used as an anode were carefully covered by wax so that the polished and cleaned front side of the sample was exposed to the electrolyte by mounüng it in an experimental set-up employed for anodizaüon. A Pt plate was used as the cathode. Anodization process was carried out under constant current conditions of I = 1mA. The polypyrrole/p-Si diode was fabricated by an electrolyte being held at a constant temperature of 55 °C that was composed of 0.40 M pyrrole and 0.1 M tetrabutylammonium tetrafluoroborate. The electrolyte solution was prepared in a propylene carbonate solvent (Merck). The Polypyrrole/p-Si/Al structure has demonstrated rectifying behavior by the current-voltage cuives studied at room temperature. The sample was exposed to x-ray irradiation up to 50 keV at constant doses in order to determine effect of x-ray radiation on interface between polypyrrole and Si semiconductor. The parameters of the structure such as barrier height, ideality factor, series resistance and interface state density are determined how to change with the irradiation. The interface state density distribution curves of device was obtained from forward bias current-voltage (I-V) characteristic.
Description
Keywords
X-rays, X-ışınları, Irradiation effects, Işınlama etkileri, Polypyrrole/p-Si structure, Poliprol/p-Si yapısı
Citation
Biber, M. ... [ve arkadaşları]. (2006). X-ray irradiation effects on the interface of polypyrrole/p-Si structure. The Fourth Eurasian Conference on Nuclear Science and Its Application : Presentations, (s. 395-398). 31 October-3 November 2006. Baku, Azerbaijan.