Ionizing radiation effects on Au/TiO2/n-Si metal-insulator-semiconductor (MIS) structure


Ertugrul-Uyar R., Buyukbas-Ulusan A., Tataroglu A.

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, cilt.31, sa.22, ss.19846-19851, 2020 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 31 Konu: 22
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1007/s10854-020-04508-y
  • Dergi Adı: JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
  • Sayfa Sayıları: ss.19846-19851

Özet

This paper presents the ionizing radiation effects on current-voltage (I-V) characteristics of Au/TiO2/n-Si metal-insulator-semiconductor (MIS) structure. The TiO(2)film as the dielectric interface layer of Au/n-Si was deposited using RF magnetron sputtering method. The MIS structure was exposed to gamma irradiation from Co-60 source with the dose rate of 0.69 kGy/h, and it was irradiated in the range of 0-100 kGy. The electronic parameters such as barrier height (phi(b0)), ideality factor (n), series resistance (R-s), and interface state density (N-ss) of the MIS structure were calculated from the measured I-V data. Experimental results showed that all calculated parameters change with the irradiation dose rate. To determine current conduction mechanisms of the MIS structure, the In (I-F) vs In (V) and In (I-R) vsV(1/2)curves for all irradiation doses are plotted under both forward bias and reverse bias, respectively.