Schottky barrier parameters and low frequency noise characteristics of graphene-germanium Schottky barrier diode

Хэвлэлийн нэр: Superlattices and Microstructures

Зохиогч:  Х.Загарзүсэм

Хамтран зохиогч: Zagarzusem Khurelbaatar, Yeon-Ho Kil, Kyu-Hwan Shim, Hyunjin Cho, Myung Jong Kim, Sung-Nam Lee, Jae-chan Jeong, Hyobong Hong, Chel-Jong Choi

Хэвлүүлсэн огноо: 2016-01-22

Хуудас дугаар: Volume 91, March 2016, Pages 306-312

Өгүүллийн хураангуй:

We investigated the electrical properties of chemical vapor deposition-grown monolayer graphene/n-type germanium (Ge) Schottky barrier diodes (SBD) using current–voltage (I–V) characteristics and low-frequency noise measurements. The Schottky barrier parameters of graphene/n-type Ge SBDs, such as Schottky barrier height (ФB), ideality factor (n), and series resistance (Rs), were extracted using the forward I–V and Cheung's methods. The ФB and n extracted from the forward ln(I)–V plot were found to be 0.63 eV and 1.78, respectively. In contrast, from Cheung method, the ФB and n were calculated to be 0.53 eV and 1.76, respectively. Such a discrepancy between the values of ФB calculated from the forward I–V and Cheung's methods indicated a deviation from the ideal thermionic emission of graphene/n-type Ge SBD associated with the voltage drop across graphene. The low-frequency noise measurements performed at the frequencies in the range of 10 Hz–1 kHz showed that the graphene/n-type Ge SBD had 1/f γ frequency dependence, with γ ranging from 1.09 to 1.12, regardless of applied forward biases. Similar to forward-biased SBDs operating in the thermionic emission mode, the current noise power spectral density of graphene/n-type Ge SBD was linearly proportional to the forward current.

Өгүүллийн төрөл: Томсон-Ройтерсийн индекстэй(IF-JCR) сэтгүүл

Өгүүллийн зэрэглэл: Гадаад

Түлхүүр үг: #Current noise #Ge #1/f noise #Schottky contact #Graphene #power spectral density

Өгүүлэл нэмсэн: Х.Загарзүсэм

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