The C–V and G/ω–V Electrical Characteristics of 60Co γ-Ray Irradiated Al/Si3N4/p-Si (MIS) Structures

doi:10.1088/0256-307X/30/7/077306

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Abstract：The influence of ⁶⁰Co (γ-ray) irradiation on the electrical characteristics of Al/Si₃N₄/p-Si (MIS) structures is investigated using capacitance-voltage (C–V) and conductance-voltage (G/ω–V) measurements. The MIS structures are exposed to a ⁶⁰Co γ radiation source at a dose of 0.7 kGy/h, with a total dose range of 0–100 kGy. The C–V and G/ω–V properties are measured before and after ⁶⁰Co γ-ray irradiation at 500 kHz and room temperature. It is found that the capacitance and conductance values decrease with the increase in the total dose due to the irradiation-induced defects at the interface. The results also indicate that γ radiation causes an increase in the barrier height ?_B, Fermi energy E_F and depletion layer width W_D. The interface state density (N_ss), using the Hill–Coleman method and dependent on radiation dose, is determined from the C–V and G/ω–V measurements and decreases with an increase in the radiation dose. The decrease in the interface states can be attributed to the decrease in the recombination centers and the passivation of the Si surface due to the deposition insulator layer (Si₃N₄). In addition, it is clear that the acceptor concentration N_A decreases with increasing radiation dose. The profile of series resistance R_s for various radiation doses is obtained from forward and reverse-biased C–V and G/ω–V measurements, and its values decrease with increasing radiation dose, while it increases with increasing voltage in the accumulation region

收稿日期: 2013-03-05 出版日期: 2013-11-21

:	73.40.-c	(Electronic transport in interface structures)
	73.40.Qv	(Metal-insulator-semiconductor structures (including semiconductor-to-insulator))
	42.88.+h	(Environmental and radiation effects on optical elements, devices, and systems)

引用本文:

. [J]. 中国物理快报, 2013, 30(7): 77306-077306.
S. Zeyrek, A. Turan, M. M. Bülbül. The C–V and G/ω–V Electrical Characteristics of ⁶⁰Co γ-Ray Irradiated Al/Si₃N₄/p-Si (MIS) Structures. Chin. Phys. Lett., 2013, 30(7): 77306-077306.

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https://cpl.iphy.ac.cn/CN/10.1088/0256-307X/30/7/077306 或 https://cpl.iphy.ac.cn/CN/Y2013/V30/I7/77306

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